Date   

Re: B+ delay circuit elimination?

Craig Sawyers <c.sawyers@...>
 

I have wondered if any great
harm is done
by bypassing that if new filter caps are installed, and the
rectifiers are
replaced.
Well, it is nothing to do with the filter caps and rectifiers. It is to do
with getting a long life out of the tubes in the 'scope. As Tek says in
"Typical Oscillosope Circuitry" (this is a book all about the design details
of the 545):

"Initial Operation. When we turn on the power switch in the system of Fig
12-16 [the 545A power supply circuit], we first want to allow time for the
heaters to reach operating temperature before we energise the DC supplies to
apply most of the plate and screen voltages......It is to allow this initial
heater warm up time that we include the thermal time delay relay K600 and
its associated magnetic relay K601.......K600 is rated for an applied
voltage of 6V. To maximise operation reliability, K600 operates here from
12.6V through R600 [12 ohms] so the applied voltage is at least 6V even if
the line voltage is somewhat low"

If yours if duff (although quite how I'm not sure - it is just a heater and
bimetal strip in a glass envelope - so it should work or totally fail, not
go intermittent) I would consider replacing it with a solid state delay
circuit (capacitor, few resistors and a couple of transistors) running off
rectified and smoothed 12.6V, and use that output to fire off relay K601.

Craig


clock calibration

Craig Sawyers <c.sawyers@...>
 

Hi folks

There is a abit of Tek content here, but the general content I thought might
be interesting. Some time ago I bought a 10MHz ovenised crystal oscillator.
This has about the same specs as the HP10544A unit, but was a lot less
expensive. It also doesn't have an electrically adjustable frequency (the
10544A can be tuned over +/-1Hz with an electrical control input).

Problem is, how to set up the frequency using the coarse and fine frequency
controls?

Well, here in the UK, the colour sub-carrier on broadcast TV is referenced
at the BBC to a Rb clock, and has an uncerainty of around 1 in 10^12. This
colour burst sub-carrier at 8.8672375MHz is used to phase lock an oscillator
in the TV - so there is a source of frequency in the domestic TV that is
good to 1 part in 10^12 when the TV is tuned to a station.

So what I did was hitch a 10:1 scope probe to the oscillator input pin. The
risk here is that the loading of the probe will upset the crystal oscillator
so much that it loses lock. However, if it does loose lock, the colour on
the picture disappears or goes otherwise loopy. Carefully choosing a
passive probe seemed to work OK, but the other option if this didn't work
was to use a FET probe, which has much lower capacitance.

I then boosted the signal level using a 7704A as an amplifier! Signal into
a 7A26, and the output taken from the vertical out rear panel connector.
That fed into the input of an HP 5328A counter. Mine has the high
performance input section, which jitters the clock with a noise source to
reduce quantisation error, and is good on time average measurements to
better than 0.01ps.

The OCXO was used as an external clock for the counter.

Of course if the crystal was on frequency, the counter would register
8.8672375MHz. In fact the last digit was 7, not 5, indicating an error of
around 2e-8. In fact I did the adjustments with reference to the time
interval measurement, since that gives an extra digit of resolution. Before
adjustment this read 112.7746915ns, and I was looking for 45 as that last
two digits. The final digit here is slightly fictitious - I took around 100
readings of the last "real" digit (the "1" or the "4" in the above numbers),
which is randomly distributed. Taking the average you can then interpolate
to one more digit of resolution. I think that this is allowable because of
the jitter system in the 5328A.

It took a little while, because inserting an adjustment tool into the
enclosure upsets the temperature a little, and it takes a few minutes to
restabilise. However, after half an hour or so I got the desired result,
and now I estimate my oscillator is set to 10MHz with an error of around
1:10^9.

Oh yes - the oven has been on for over a week to allow it to stabilise.

Craig


Mysterious error messages from 11801 series

Mark KAHRS <kahrs@...>
 

They've started to show up on ebay... Dead 11801s with mysterious
numeric error codes, for example, E5622. Does anyone know how to find
out what these mean? Of course the hardware manual is useless for an
instrument of this vintage...

Any assistance would be appreciated, as always.


B+ delay circuit elimination?

Mark Anton
 

Yes, lets get back to and continue on with fixing scopes:)
I do have an old 531 and a 545 rackmount sitting around that I would like to get into sometime. Don't know if soon though. Still looking at my 310 yet which is coming along nicely:)
This brings up a question on the 530 and 540 series.
Those have a B+ delay circuit. I have wondered if any great harm is done by bypassing that if new filter caps are installed, and the rectifiers are replaced. At least one of these scopes has a funky relay. If I turn it on and see no trace, I can tap on the case of the relay and bingo there it is.

Mark Anton




----Original Message Follows----
From: "Stefan Heinzmann <stefan_heinzmann@yahoo.com>" <stefan_heinzmann@yahoo.com>
To: TekScopes@yahoogroups.com
Subject: [TekScopes] Re: Reply woes
Date: Tue, 04 Feb 2003 13:57:28 -0000

--- In TekScopes@yahoogroups.com, "Mark Anton" <heightstv@h...> wrote:
I havent been here a very long time, but seems like this group is going
fine

_________________________________________________________________
MSN 8 with e-mail virus protection service: 2 months FREE* http://join.msn.com/?page=features/virus


Re: B+ delay circuit elimination?

donlcramer@...
 

In a message dated 2/4/03 10:34:59 AM Pacific Standard Time,
dcrowe314@yahoo.com writes:


Removing the B+ delay is probably not a good thing.
I don't know specifically about this scope, but the literature suggests you
can get cathode stripping of the tubes if the B+ is available before the
heaters come up fully.

Don


Lesson learned from scanning the 7104 Manual

ebayatessnh
 

Hi everyone,

About 18 months ago, I decided that there was a good business
oppurtunity to scan and sell Tektronix manuals on the web. Permission
was obtained from Tektronix. Manuals were rented or purchased. Adobe
was purchased, and a scanner with an automatic document feeder.
Overall and investment of about $1000 was made.

The 7104, 7T11, and 7S11 manual were scanned into good quality
images, including multiple views of the 11x17 schematics. The plan
was to require a faxed agreement from each buyer, and mark each
manual with and identifing mark so that the source could be traced in
the event the manuals showed up elsewhere on the web.

Here are the lessons learned :

1) Manuals take many hours to scan well, even with an automatic
document feeder. (Figure a total of about 2 min per page from
removing the spine, to a finished, formatted manual)

2) Schematics are the bulk of the time, and difficult to scan without
an 11x17 scanner. Getting good quality, straight scans on an 8.5x11
bed takes multiple scans.

3) Resulting PDF files are huge (300 MB+ for the 7104). This makes
them inpractical to distribute on the web.

4) By the time I retire and have time to get into the business, the
oppurtunity will be lost.

5) The built in Adobe OCR (it does have one) is good for the bulk of
the manual text, but has lots of problems with the non text Tektronix
fonts. And even 1% errors in text are very difficult to fix.

One possibility is to hire a high school kid that was good with
computers and could provide cheap labor. However things got very busy
at work, and the project was dropped.

As a result of the project, I do have some interesting scans. If a
regular user of this group is interested in a copy on CD drop me an
email. My preference is to trade for something else, but would
consider selling copies. And you would have to FAX some kind of
agreement not to re-distribute in digital form.

Dave


Re: Reply woes

Stefan Heinzmann <stefan_heinzmann@yahoo.com>
 

--- In TekScopes@yahoogroups.com, "Mark Anton" <heightstv@h...> wrote:
I havent been here a very long time, but seems like this group is going
along fine. It is much worse the other way, I belong to another
group that
moderater is gone from, and now are getting porn advertisements on.
So would think that if anyone has a specific problem to take it up
with list
owner.
I second that. I am quite happy with this group in general. I'm
already a bit sorry that I kicked off this discussion, just because I
was a bit annoyed by the reply options. Now that I know it was
conciously set the way it is I can comfortably live with that. Stan's
quite right saying that the problem is minor.

The discussion about the moderation policy has gone too far already, I
think. There may be conflicting opinions about it, but I am sure in a
group of several hundred people there always will be and if the policy
wouldn't "work" people would vote "with their feet". From that
viewpoint it often is better to have an opinion and apply it rather
than trying to please everybody. I am happy that there is a moderator
who does his mostly hidden and thankless work as a service to the
community. He deserves some latitude in the way he does his work.

What I don't understand fully is Stan's assertion that the group is
something like the private property of the moderator. Stan contributes
such a lot to this group that I find it difficult to believe that he
thinks he gave all this into the private property of the moderator. I
much rather like to think he (and all the other contributors) wanted
to put it into the public domain (or at least the part of the public
domain that likes Tek scopes). But maybe I misunderstand what he wrote.

But I don't really want to carry this any further. Time can be spent
in a more useful way...

Cheers
Stefan

----Original Message Follows----
From: "Stan & Patricia Griffiths" <w7ni@e...>
To: "TekScopes" <TekScopes@yahoogroups.com>
Subject: Re: [TekScopes] Reply woes
Date: Sun, 2 Feb 2003 16:25:30 -0800

Hey, in defense of Michael, it is HIS reflector and I will defend,
to the
maximum, his right to rule it any way he wants. I certainly hope, if I
write another book, I don't have to put it to a vote regarding content
before I can publish it . . . This all has something to do with the
principle of private property rights, I think . . .

This discussion isn't getting any Tek scopes fixed . . . Those of
us who
have been here for awhile know that defaulting replies to the entire
list
ends up getting a lot of personal messages posted to the list which
wastes
alot of time, bandwidth, etc. If you happen to goof and not reply
to the
list when you intended to do it, you can simply send the message
again . . .
this time to the list. No harm done.

Stan
w7ni@e...

----- Original Message -----
From: "Miroslav Pokorni" <mpokorni2000@y...>
To: <TekScopes@yahoogroups.com>; <stefan_heinzmann@y...>
Sent: Thursday, January 30, 2003 3:28 PM
Subject: Re: [TekScopes] Reply woes


> Hello Stefan,
>
> You seem to be new to the group and do not know about group's dirty
laundry.
> Default reply used to be 'reply to all', I guess that is Yahoo's
custom.
The
> guy who moderates this group, Michael Dunn from Canada, not to be
confused
> with a gentleman from Australia with same name, have somewhat
strange
idea
> about replies. He wants all history of correspondence trimmed,
what is
> pretty silly if you want an easy way to follow content. Trouble
is that
> Michael's manners seem to be those of a German mustached man, one
of 30s
> fame, who said: 'ein folks, ein fuehrer. So, Michael man enacted
rules,
> unilaterally, and would suspend someone's postings without
telling people
> that they are suspended. When you 'confront' him (as much as you can
> confront someone over e mail) he would say that Yahoo is slow and
by God,
> your postings appear on the forum.
>
> So, after going back and forth, Ashton Brown even calling for
rebellion,
> default reply was changed to 'reply to sender' and I think that
saved us
all
> a lot of aggravation.
>
> If you want to reply to the whole group, you can use 'reply to all'
button.
> There are other ways to effect reply to the group, or maybe these are
> different settings of e mail program, and result is that
originator of e
> mail gets two mailings, one as author of original e mail and one as a
group
> member.
>
> Regards
>
> Miroslav Pokorni
>
> ----- Original Message -----
> From: <stefan_heinzmann@y...>
> To: <TekScopes@yahoogroups.com>
> Sent: Thursday, January 30, 2003 3:00 AM
> Subject: [TekScopes] Reply woes
>
>
> > Hi all,
> >
> > I just accidentally sent two replies to two group members directly
> > instaed of sending them to the entire group. That was because I
used
> > the Yahoo web forms, and when hitting reply there it seems that the
> > default address is not the list address, but the sender's address.
> > Annoying!
> >
> > I use the web form because I receive digests by email rather than
> > individual messages.
> >
> > How do you deal with that? Is there some hidden option that can
be set
> > to make the list address the default reply address?
> >
> > Cheers
> > Stefan
> >
> >
> >
>
>
>
>
> Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
>
>




_________________________________________________________________
Tired of spam? Get advanced junk mail protection with MSN 8.
http://join.msn.com/?page=features/junkmail


Re: Copyright of Tektronix manuals

Don Black <jeans@...>
 

Hi Stan,
I respect your work. If you're getting good results that's fine by
me.
Don Black.

Stan & Patricia Griffiths wrote:

I know this is the TekScope reflector, but since I am using Adobe Acrobat to
put Tek Catalogs on CD, I would not like anyone to think they will get
"fuzzy images" from my CD's. Acrobat incorporates scanned images in a PDF
format that I will put on a CD. Whether they are fuzzy or not will depend
on what resolution the scanner was set to or how clear the originals are and
has nothing to do with Adobe Acrobat itself . . . except that Adobe Acrobat
allows the maker of the CD to screw up by choosing too low of a resolution
when scanning as do all the other programs that I am aware of . . .

As far as how fast can you scan through images . . . How fast is your
computer?

Of course you can always trade display speed for resolution . . . You can
put up low resolution images really fast or high resolution images slowly.
The trick is to pick a good compromise. I don't think there is a software
solution to getting fast, high resolution images . . . but I could be wrong
. . . Please educate me.

Stan
w7ni@easystreet.com

----- Original Message -----
From: "Don Black" <jeans@nex.net.au>
To: <amorphousfish@netscape.net>
Cc: <TekScopes@yahoogroups.com>
Sent: Saturday, February 01, 2003 5:18 PM
Subject: Re: [TekScopes] Re: Copyright of Tektronix manuals

Acrobat has been around for a while now but it has some limitations; slow
to
scroll through and fuzzy images.


Re: Copyright of Tektronix manuals

Stan & Patricia Griffiths <w7ni@...>
 

I know this is the TekScope reflector, but since I am using Adobe Acrobat to
put Tek Catalogs on CD, I would not like anyone to think they will get
"fuzzy images" from my CD's. Acrobat incorporates scanned images in a PDF
format that I will put on a CD. Whether they are fuzzy or not will depend
on what resolution the scanner was set to or how clear the originals are and
has nothing to do with Adobe Acrobat itself . . . except that Adobe Acrobat
allows the maker of the CD to screw up by choosing too low of a resolution
when scanning as do all the other programs that I am aware of . . .

As far as how fast can you scan through images . . . How fast is your
computer?

Of course you can always trade display speed for resolution . . . You can
put up low resolution images really fast or high resolution images slowly.
The trick is to pick a good compromise. I don't think there is a software
solution to getting fast, high resolution images . . . but I could be wrong
. . . Please educate me.

Stan
w7ni@easystreet.com

----- Original Message -----
From: "Don Black" <jeans@nex.net.au>
To: <amorphousfish@netscape.net>
Cc: <TekScopes@yahoogroups.com>
Sent: Saturday, February 01, 2003 5:18 PM
Subject: Re: [TekScopes] Re: Copyright of Tektronix manuals


Acrobat has been around for a while now but it has some limitations; slow
to
scroll through and fuzzy images.


TAS465 fixed! Report follows:!

donlcramer@...
 

I've noticed some of the same symptoms on other TAS465 scopes I find, either
in person or via ebay photos. So now that mine is completely fixed (crossed
fingers), I thought I should relay to the group what I found.

When I got my scope, the trace appeared to be off the left side of the
screen, though the front panel LEDs lit up as if a self test was successfully
running. The right side center of the screen was darker (discolored) even
when the scope was off. Behind the blue filter were "undulations", somewhat
reminiscent of the credits background to an "I Love Lucy" show.

My scope was Tek refurbished (identified by a sticker), with serial number
BR10900. I take that to mean it was and early instrument, something like
B010900 originally, before the refurb.

Upon disassembly, I found the darkened area was dust (!). Turns out the
scope was missing the CRT dust gasket. The "undulations" were the result of
the clear implosion shield delaminating. I originally thought that perhaps
the protective liners were not removed during assembly, but the replacement
part didn't come with liners. The stuff sloughing off was like bits of
cellophane wrapper--actually more like the thin transparent edible rice paper
layer on those Japanese candies (an analogy probably even further out there
than the "I Love Lucy" reference....). There is another TAS465 at work with
exactly the same symptoms, and I've seen them on ebay also, so take heart
these symptoms can be fixed fairly easily. It's not a bad CRT!

Next, 2 of the 4 corner CRT rubber cushions were missing, so the tube rocked
around in the plastic bezel a bit. At this point, I contacted Tek and bought
new parts--clear implosion shield, rubber cushions, dust gasket, and while I
was at it, a new blue filter (by the way, the blue filter PN is shared with
the 2400 series). This scope came out around 1991, and it has 1994 firmware,
so I was pleased that not only were the parts still available, but they were
also relatively inexpensive. I don't think Agilent is so forgiving (anyone
with a CRT Drive Board for an '8920, contact me!).

In addition, one of the back corner feet (doubling as a cord wrap post) was
broken, so I also ordered a new plastic back panel. This was a bit more
tricky as the only part Tek still stocks doesn't have the Lexan labels on it.
However, I was able to carefully remove the labels from the old back panel
(by breaking up the old panel in critical places). I removed what was left
of the old adhesive, then resprayed them with 3M 'Super 77' aerosol adhesive
and reapplied them to the new panel. The advantage of spray adhesive is you
get uniform coverage to the edges of the label (and don't spray the back
cover), and after application, any adhesive which might have got around to
the front of the label can be easily removed with adhesive remover.

BTW, the Tek part order went in on an afternoon, and they were at my house
the next day. Including the blue filters which were supposed to be 12wks
back ordered. Sure I live in Beaverton, too, but wow!

So, including a good clean, the cosmetics were as good as new. One thing I
think that helps these scopes, is that they are so light, it's not likely the
can will get dented due to mishandling.

Next, a ribbon cable had caught on the case and became unplugged, which was
the reason for the trace being off screen. I'd actually looked into this
before I went through the CRT bits above. Problem was I then found the scope
worked, but the readouts were intermittently moving downscreen. This was
tracked to an intermittent short on an input of the large Analog board
hybrid. In fact, the fault was coming from *inside* the hybrid (drat!). As
background, the CRT on-screen readouts are driven from two differential
output current DACs on the CPU board, one for vertical deflection and one for
horizontal. The signals from the DACS go to the large analog hybrid where
there are combined with the scope input channels. This component is amazing,
as most of the analog stuff is done in this one very big hybrid IC. I found
I could rebias the circuit so that one could short the bad input to ground
and drive the hybrid "single ended", but I was uncomfortable with this
approach as this same DAC is part of the voltage cursor feature (so needs
high accuracy and stability). So there was more to it than just getting the
readouts back on screen and positioned 'about right'.

Another thing I found wrong was that the power supply was replaced with a
newer version (no line selector switch needed), but would you believe the
power supply output was not adjusted? So, as stated in step one of the cal
procedure, I adjusted the supply up to spec. At this point, with the missing
parts and a misadjusted power supply, with similar symptoms on other TAS465
scopes, I was really beginning to believe Tek suffered through some dark days
in mid-to-late 90s.

Back to the hybrid, later that same year: Trust me, I made double-double
sure it was the hybrid and not something else. To cut to the chase, the
hybrid is not available from Tek anymore, nor is the entire Analog circuit
board assembly. But with patience, I eventually found another Analog board
on ebay from a TAS465 that was being scrapped out. So when it came time to
do the swap, would you believe, the old board had *fixed* itself and wouldn't
show the problem again. Dinked around with it for days, and no further
problems. I guess that new board scared it into behaving..... (something
about Murphy to come I suppose)

With the supply recal'd to spec, the horizontal and vertical gain
calibrations were off, so I performed a recal. It was actually quite easy,
as much of it is done with built in cal routines. Vertical and trigger cal is
done with (precision) DC levels being input, and much of the horizontal is
done using the front panel "knob" and cursors. I checked, but didn't
readjust HF and attenuator compensation, because I haven't got a nice PG506
type pulse generator. I'm hoping the supply tweak doesn't impact those
adjustments much--they seem fine--but would be glad to hear from anyone who
knows.

BTW, another interesting bit was the CPU board didn't have the later cal
lockout jumper, though the firmware seems to be up-to-date. I assume the
refurb included new firmware but left the old board in place (?). The bad
bit is one can enter the factory cal routines from the front panel at
anytime. Memo: don't loan the scope out.

So, it appears it is done. Fingers crossed about the readout problem not
coming back....

And a very grateful thanks once again to Andrew in Australia who was able to
source the service manual for me. I owe you a beer, mate!

I hope this of use to others.

Don


DM44 working! Or so it appear... ;-)

msiddalingaiah <msiddalingaiah@yahoo.com>
 

After lots of great suggestions, I was able to secure an LD110 for the
DM44 on my 475A. It was acting up in strange ways. I couldn't say for
sure, but it was looking like that part was the culprit. Sometimes it
would work, and sometimes it wouldn't. The signals on the LD110 were
all correct, but the display would not stabilize. It seemed odd to me
that a device could partly work. In my experience, it either works or
it doesn't.

The LD110 is no longer in production, so it was not particularly easy
to find. I contacted Deane Kidd and when I asked him if he knew where
I could find one of these parts, his dry reply was "In a parts bin
down the hall".

The LD110 arrived. I just popped it in, and guess what? It worked!!
I just hope it keeps working, I saved the old LD110 just in case.

The moral of the story:

1. Integrated circuits can partially fail
2. Deane Kidd is the go to guy


Apology

Miroslav Pokorni
 

Hello Michael,

I owe you an apology. All my past complaints were based on assumption that
this forum is a public property and that you were an appointed moderator.
Few members of the forum wrote to me over past few days, explaining how
those 'list' things are run on Internet. That was new to me and fact that
this forum is your private property certainly changes all relations on the
list.

Please, accept my apology. All came from my misunderstanding of lists; it
would help if someone, you not excluded, told me that list is private and
not public property.

Regards

Miroslav Pokorni


Re: Reply woes

Mark Anton
 

I havent been here a very long time, but seems like this group is going along fine. It is much worse the other way, I belong to another group that moderater is gone from, and now are getting porn advertisements on.
So would think that if anyone has a specific problem to take it up with list owner.

Mark






----Original Message Follows----
From: "Stan & Patricia Griffiths" <w7ni@easystreet.com>
To: "TekScopes" <TekScopes@yahoogroups.com>
Subject: Re: [TekScopes] Reply woes
Date: Sun, 2 Feb 2003 16:25:30 -0800

Hey, in defense of Michael, it is HIS reflector and I will defend, to the
maximum, his right to rule it any way he wants. I certainly hope, if I
write another book, I don't have to put it to a vote regarding content
before I can publish it . . . This all has something to do with the
principle of private property rights, I think . . .

This discussion isn't getting any Tek scopes fixed . . . Those of us who
have been here for awhile know that defaulting replies to the entire list
ends up getting a lot of personal messages posted to the list which wastes
alot of time, bandwidth, etc. If you happen to goof and not reply to the
list when you intended to do it, you can simply send the message again . . .
this time to the list. No harm done.

Stan
w7ni@easystreet.com

----- Original Message -----
From: "Miroslav Pokorni" <mpokorni2000@yahoo.com>
To: <TekScopes@yahoogroups.com>; <stefan_heinzmann@yahoo.com>
Sent: Thursday, January 30, 2003 3:28 PM
Subject: Re: [TekScopes] Reply woes


Hello Stefan,

You seem to be new to the group and do not know about group's dirty
laundry.
Default reply used to be 'reply to all', I guess that is Yahoo's custom.
The
guy who moderates this group, Michael Dunn from Canada, not to be
confused
with a gentleman from Australia with same name, have somewhat strange
idea
about replies. He wants all history of correspondence trimmed, what is
pretty silly if you want an easy way to follow content. Trouble is that
Michael's manners seem to be those of a German mustached man, one of 30s
fame, who said: 'ein folks, ein fuehrer. So, Michael man enacted rules,
unilaterally, and would suspend someone's postings without telling people
that they are suspended. When you 'confront' him (as much as you can
confront someone over e mail) he would say that Yahoo is slow and by God,
your postings appear on the forum.

So, after going back and forth, Ashton Brown even calling for rebellion,
default reply was changed to 'reply to sender' and I think that saved us
all
a lot of aggravation.

If you want to reply to the whole group, you can use 'reply to all'
button.
There are other ways to effect reply to the group, or maybe these are
different settings of e mail program, and result is that originator of e
mail gets two mailings, one as author of original e mail and one as a
group
member.

Regards

Miroslav Pokorni

----- Original Message -----
From: <stefan_heinzmann@yahoo.com>
To: <TekScopes@yahoogroups.com>
Sent: Thursday, January 30, 2003 3:00 AM
Subject: [TekScopes] Reply woes


Hi all,

I just accidentally sent two replies to two group members directly
instaed of sending them to the entire group. That was because I used
the Yahoo web forms, and when hitting reply there it seems that the
default address is not the list address, but the sender's address.
Annoying!

I use the web form because I receive digests by email rather than
individual messages.

How do you deal with that? Is there some hidden option that can be set
to make the list address the default reply address?

Cheers
Stefan





Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/




_________________________________________________________________
Tired of spam? Get advanced junk mail protection with MSN 8. http://join.msn.com/?page=features/junkmail


Re: Reply woes

Miroslav Pokorni
 

'Michael, it is HIS reflector', what does that mean? Does that mean that
this TekScope is Michael's private property and all of us are his guests,
some of us quite ungracious? If that is the case, I have been less that
fully informed, I always thought that this forum is a communal property,
like most public things on Internet.

Regards

Miroslav Pokorni

----- Original Message -----
From: "Stan & Patricia Griffiths" <w7ni@easystreet.com>
To: "TekScopes" <TekScopes@yahoogroups.com>
Sent: Sunday, February 02, 2003 4:25 PM
Subject: Re: [TekScopes] Reply woes


Hey, in defense of Michael, it is HIS reflector and I will defend, to the
maximum, his right to rule it any way he wants. I certainly hope, if I
write another book, I don't have to put it to a vote regarding content
before I can publish it . . . This all has something to do with the
principle of private property rights, I think . . .

This discussion isn't getting any Tek scopes fixed . . . Those of us who
have been here for awhile know that defaulting replies to the entire list
ends up getting a lot of personal messages posted to the list which wastes
alot of time, bandwidth, etc. If you happen to goof and not reply to the
list when you intended to do it, you can simply send the message again . .
.
this time to the list. No harm done.

Stan
w7ni@easystreet.com

----- Original Message -----
From: "Miroslav Pokorni" <mpokorni2000@yahoo.com>
To: <TekScopes@yahoogroups.com>; <stefan_heinzmann@yahoo.com>
Sent: Thursday, January 30, 2003 3:28 PM
Subject: Re: [TekScopes] Reply woes


Hello Stefan,

You seem to be new to the group and do not know about group's dirty
laundry.
Default reply used to be 'reply to all', I guess that is Yahoo's custom.
The
guy who moderates this group, Michael Dunn from Canada, not to be
confused
with a gentleman from Australia with same name, have somewhat strange
idea
about replies. He wants all history of correspondence trimmed, what is
pretty silly if you want an easy way to follow content. Trouble is that
Michael's manners seem to be those of a German mustached man, one of 30s
fame, who said: 'ein folks, ein fuehrer. So, Michael man enacted rules,
unilaterally, and would suspend someone's postings without telling
people
that they are suspended. When you 'confront' him (as much as you can
confront someone over e mail) he would say that Yahoo is slow and by
God,
your postings appear on the forum.

So, after going back and forth, Ashton Brown even calling for rebellion,
default reply was changed to 'reply to sender' and I think that saved us
all
a lot of aggravation.

If you want to reply to the whole group, you can use 'reply to all'
button.
There are other ways to effect reply to the group, or maybe these are
different settings of e mail program, and result is that originator of e
mail gets two mailings, one as author of original e mail and one as a
group
member.

Regards

Miroslav Pokorni

----- Original Message -----
From: <stefan_heinzmann@yahoo.com>
To: <TekScopes@yahoogroups.com>
Sent: Thursday, January 30, 2003 3:00 AM
Subject: [TekScopes] Reply woes


Hi all,

I just accidentally sent two replies to two group members directly
instaed of sending them to the entire group. That was because I used
the Yahoo web forms, and when hitting reply there it seems that the
default address is not the list address, but the sender's address.
Annoying!

I use the web form because I receive digests by email rather than
individual messages.

How do you deal with that? Is there some hidden option that can be set
to make the list address the default reply address?

Cheers
Stefan





Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/



PDF Creation of Tek manuals

william smith <decalreter@...>
 

Having recently purchased a TEK manual for just under
$60, it would be nice to recover some of the expense.
Also I figure other folks looking for the same manual
to troubleshoot their scope would appreciate the same
information at a fraction of the price, if they could
get a CD of it. I know I would have. So I wrote
Tektronix and was given the same information about
older equipment no longer supported by Tek was open to
be copied. Again this did not apply to copier
equipment or equipment other than scopes (in so many
words). While my scope fit this acceptable category,
they did not currently have a "list" of which
equipment fell in this arena.

I wanted to make PDF images and found a "free" pdf
generator at http://www.pdf995.com/. However while it
worked well on color, or black and white scans, I have
a problem with grey scaled images. As such it has
taken over two months to put something I considered
acceptable together. It ended up all in JPG format. I
don't consider this unacceptable, as any "clean up"
that the end user wanted to make, could be done. Let's
fnothingsothing's perfect and if the end user can
"adjust" the quality with MS Photo Editor then they
may do so.

Do I wish to sell thcertainly9;s. I certianly wish to
recover my cost, and my time should be worth a few
dollars. My best cost to consider when I was looking
was a paper "copy" of a manual for $40. A CD shouldn't
be over $15 in my view. At least my time should be
worth a couple of bucks after the cost of supplies
etc. If a CD for $15 was available, I would have
jumped on it (had I known about it).

Well I did find out one thing.....A 300 page plus
manual is a "B----" to scan, and scan well. It's not
just scanning, but also organizing folders and naming
the scans to make sense (and spend every bit of your
life on it). In the end you know someone will complain
about it...Oh well I still have a job that's supports
me.

In the end, yes you can scan in Tek manuals without
violating their copyright, or at least without them
going after you (from their legal dept.). They don't
care, provided they no longer support it.

There are free pdf generators out there. Using Google
search on "pdf" to find them. They all have their
quirks, some are acceptable quirks and some are just
garbage. The one I tried to use, I like, but have a
problem with grey scale only! I plan to spend the $10
to register it (when to grey scale quirk is worked
out). That will eliminate the advertisement (which can
be eliminated if one stays "off-line").

BTW on various "other" lists (I'm on a couple cancer
lists) they have their "in-fighting" also, much more
than this list. So I do like this list and the way
everyone contributes......

Bill N8OTM

__________________________________________________
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Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
http://mailplus.yahoo.com


Re: Copyright of Tektronix manuals

Don Black <jeans@...>
 

Hmmm. Abby Finereader 5.0 home edition was released here as a magazine cover
disk a little while ago. it's the best OCR program I've come across.
Don Black.

John Miles wrote:

A better way to create PDF documents involves running the scanned pages
though OCR software and re-creating the original document layout with page
layout software. That is a very time consuming and complicated process, so
most of the scanned manuals you find on the web will simply be made up of
scanned images. The real benefit of re-creating documents in this manner,
is that they can then be professionally printed and the resulting PDF
files created from the OCR'd text can be searched through with recent
versions of Adobe's Acrobat Reader.
I have had good results with ABBYY FineReader
(http://www.abbyy.com/ocr_products.asp?param=1615). It's quite a bit
cheaper (US $100 or so) than Adobe Acrobat, and includes OCR recognition
(which Acrobat doesn't). Its main disadvantage is that you *have* to use
its OCR feature in order to generate .PDF files, whether you want it or not.
You can work around that by using its built-in image markup editor to draw
an image-only block around each page prior to recognition. I have both
Acrobat and FineReader Pro 5.0, and the resulting image-only .PDF files are
essentially identical. Strongly recommended.

There are some other formats out there that attempt solve some of the
limitations/problems with PDF. Some of those formats are also created
with freely available software.
It's true that there are better formats than PDF (such as the aforementioned
DjVu), but please don't use them! PDF is a government- and
industry-standard document format that will probably outlast us all. Five
or ten years from now, there will be NO way for many people in need of Tek
manuals to read a DjVu file. Meanwhile, storage space will be even cheaper
than it is today, making the decision to give up widespread compatibility
for efficiency's sake a poor one.

Yes, DjVu is more "browsable" than PDF, but who browses Tek manuals on their
monitor anyway? For printing, which is all that counts, they all work
exactly the same.

-- jm



Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/


Re: WTB: Scope Cart

Stan & Patricia Griffiths <w7ni@...>
 

HI Don,

One has to wait until I get finished with it. I let out a couple of Beta test copies and got some feedback for problems and improvements I have to implement. I will announce it on TekScopes when it is ready in a week or two . . .

Thanks for asking, Don.

Stan

----- Original Message -----
From: DonLCramer@cs.com
To: w7ni@easystreet.com
Sent: Thursday, January 30, 2003 10:52 PM
Subject: Re: [TekScopes] WTB: Scope Cart


In a message dated 1/29/03 10:27:57 PM Pacific Standard Time, w7ni@easystreet.com writes:



You need a copy of my "1975 Tektronix Catalog on CD"

Stan
w7ni@easystreet.com




Say, how does one get one?

Best rgds,

Don


Re: Reply woes

Stan & Patricia Griffiths <w7ni@...>
 

Hey, in defense of Michael, it is HIS reflector and I will defend, to the
maximum, his right to rule it any way he wants. I certainly hope, if I
write another book, I don't have to put it to a vote regarding content
before I can publish it . . . This all has something to do with the
principle of private property rights, I think . . .

This discussion isn't getting any Tek scopes fixed . . . Those of us who
have been here for awhile know that defaulting replies to the entire list
ends up getting a lot of personal messages posted to the list which wastes
alot of time, bandwidth, etc. If you happen to goof and not reply to the
list when you intended to do it, you can simply send the message again . . .
this time to the list. No harm done.

Stan
w7ni@easystreet.com

----- Original Message -----
From: "Miroslav Pokorni" <mpokorni2000@yahoo.com>
To: <TekScopes@yahoogroups.com>; <stefan_heinzmann@yahoo.com>
Sent: Thursday, January 30, 2003 3:28 PM
Subject: Re: [TekScopes] Reply woes


Hello Stefan,

You seem to be new to the group and do not know about group's dirty
laundry.
Default reply used to be 'reply to all', I guess that is Yahoo's custom.
The
guy who moderates this group, Michael Dunn from Canada, not to be confused
with a gentleman from Australia with same name, have somewhat strange idea
about replies. He wants all history of correspondence trimmed, what is
pretty silly if you want an easy way to follow content. Trouble is that
Michael's manners seem to be those of a German mustached man, one of 30s
fame, who said: 'ein folks, ein fuehrer. So, Michael man enacted rules,
unilaterally, and would suspend someone's postings without telling people
that they are suspended. When you 'confront' him (as much as you can
confront someone over e mail) he would say that Yahoo is slow and by God,
your postings appear on the forum.

So, after going back and forth, Ashton Brown even calling for rebellion,
default reply was changed to 'reply to sender' and I think that saved us
all
a lot of aggravation.

If you want to reply to the whole group, you can use 'reply to all'
button.
There are other ways to effect reply to the group, or maybe these are
different settings of e mail program, and result is that originator of e
mail gets two mailings, one as author of original e mail and one as a
group
member.

Regards

Miroslav Pokorni

----- Original Message -----
From: <stefan_heinzmann@yahoo.com>
To: <TekScopes@yahoogroups.com>
Sent: Thursday, January 30, 2003 3:00 AM
Subject: [TekScopes] Reply woes


Hi all,

I just accidentally sent two replies to two group members directly
instaed of sending them to the entire group. That was because I used
the Yahoo web forms, and when hitting reply there it seems that the
default address is not the list address, but the sender's address.
Annoying!

I use the web form because I receive digests by email rather than
individual messages.

How do you deal with that? Is there some hidden option that can be set
to make the list address the default reply address?

Cheers
Stefan





Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/


Re: Tek 570 vacuum tube curve tracer for sale to good home

Stan & Patricia Griffiths <w7ni@...>
 

I have found with some old meters, if you loosen the bearings slightly
(about 10 degrees on the screw that adjusts them for play), they stickiness
seems to go away. Might be worth a try . . .

Stan
w7ni@easystreet.com

----- Original Message -----
From: "Dale H Cook" <radiotest@juno.com>
To: <TekScopes@yahoogroups.com>
Sent: Thursday, January 30, 2003 3:02 PM
Subject: Re: [TekScopes] Tek 570 vacuum tube curve tracer for sale to good
home


On Thu, 30 Jan 2003 17:17:40 -0500 John Rehwinkel <jrehwin@fgm.com>
writes:

Actually, I've been considering selling my 570. I've been slowly
repairing it, and it's mostly working (except the meter has acquired
a memory, which I don't understand at all).
John -

If the needle keeps hanging at the same spot it could be that dust has
gotten into the meter bearings.

Dale H. Cook, Chief Engineer, WWWR Roanoke VA, WCQV Moneta VA, WKBA WZZI
Vinton VA, WKPA WLNI WZZU Lynchburg VA, WMNA / WMNA-FM Gretna VA




Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/


Re: Should we start a Wiki?

Stan & Patricia Griffiths <w7ni@...>
 

For what its worth, I cannot afford any more time to participate in another
group about Tek stuff, no matter how interesting it may be. I have thought
many times about unsubscribing from TekScopes . . . not because I don't like
it, not because it is not interesting . . . but because it seems to take
over my life at times and important stuff just does not get done . . . The
idea of a Wiki may be a great one for lots of you. I just can't
participate.

Stan
w7ni@easystreet.com

----- Original Message -----
From: "Craig Sawyers" <c.sawyers@tech-enterprise.com>
To: "Stan & Patricia Griffiths" <w7ni@easystreet.com>
Cc: "TekScopes" <TekScopes@yahoogroups.com>
Sent: Thursday, January 30, 2003 1:13 AM
Subject: RE: [TekScopes] Should we start a Wiki?


On the Wiki idea: the now defunct forum on Reprise.com was (is)
supposed to
be updatated and turned back on in the future. Bill hoped to
archive all of
the postings and make them all searchable by key word or phrase.
My tuppence (two cents) worth - I generally prefer e-mail based forums to
web based ones. E-mail has the advantage that it is entirely passive.
Start up the mail program and *pow* there are the messages. With a web
based one (and the reprise one contained lots of useful information) the
user has to actively remember to open the browser and have a look at what
is
new.

Craig

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