Date   
Re: Strange Probe ...

 

Hi Håkan,
Thanks for the P6033 manual.
The entire PDF appeared to download just fine in my web browser (Chrome) but I could only see the first 3 or 4 pages that way.
When I saved it to my hard disk I was able to see it all.
Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
zenith5106
Sent: Friday, September 07, 2018 3:34 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Strange Probe ...

On Fri, Sep 7, 2018 at 06:11 PM, Mike Harmon wrote:


Please let me know if you can enlighten me on this thing!
See the manual here: http://hakanh.com/dl/temp/P6033.pdf

Sorry about the relative poor quality. it was made from microfiche using
an EPSON Photo scanner not having quite the high resolution needed. But
better than nothing, I guess.

/Håkan



--
Dennis Tillman W7PF
TekScopes Moderator

Re: 7K series - Conceptual question - What's the 3rd most useful plugin

Harvey White
 

On Fri, 07 Sep 2018 11:59:09 -0700, you wrote:

Bonus question for extra points: what is the _least_ useful 7000 plugin?

For a long time I thought it must the 7D13 DMM, but now I have one I've changed my mind :-)
7A19P, 7B90P, very specialized, although when you need them, they're
indispensible.

Of course, the obligatory answer is the blank slot cover....

Harvey



EJP


Re: 7K series - Conceptual question - What's the 3rd most useful plugin

 

Hi Dave,
I have to admit that I have not found a use for the 7A17 yet but I keep
thinking about it and maybe someday I will come up with a useful application
for it. The 7A17 was in the catalogs from 1972 until 1986 so somebody must
have been using them for something.

The 7A21N would be a close tie for the 7A17. It was in the catalogs from
1972 until 1979. It was used with the 500MHz 7904 when the 7904 was the
fastest 7000 scope. It boosted the bandwidth to over 1GHz by going direct to
the 8cm x 10 cm CRT's deflection plates. The combined sensitivity was 4V/Div
or 2V/Div differential. It was the only way to get to 1GHz until 1979 other
than the 519. It sure was a lot better than a 519 (10V/cm) with a tiny 2cm x
6cm screen. I did use the 7A21N for several weeks more as an experiment than
anything else. When the 7104 was introduced in 1979 it made the 7A21
obsolete.

I disagree about the 7A18 but that is probably because you haven't found the
right 7A18! There is a wonderful option for the 7A18 and the 7A18A. Option
06 gives it offset capability which comes in very handy in certain cases,
especially if you don't have a 7A13. The only other plugins to have offset
were the 7A11, 7A12, and a very rare version of the 7A15.

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Artekmedia
Sent: Friday, September 07, 2018 12:16 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] 7K series - Conceptual question - What's the 3rd
most useful plugin

7A17, followed by 7A18 .... and just about all of the 7D series (stand
alone DMM and Counters generally do a better job)

On 9/7/2018 2:59 PM, EJP wrote:
Bonus question for extra points: what is the _least_ useful 7000 plugin?

For a long time I thought it must the 7D13 DMM, but now I have one
I've changed my mind :-)

EJP
--
Dave
Manuals@...
www.ArtekManuals.com



--
Dennis Tillman W7PF
TekScopes Moderator

Re: Strange Probe ...

Tom Gardner
 

On 07/09/18 23:33, zenith5106 wrote:
On Fri, Sep 7, 2018 at 06:11 PM, Mike Harmon wrote:

Please let me know if you can enlighten me on this thing!
See the manual here: http://hakanh.com/dl/temp/P6033.pdf

Sorry about the relative poor quality. it was made from microfiche using an EPSON Photo scanner
not having quite the high resolution needed. But better than nothing, I guess.
It is readable, not on the TekWiki, therefore definitely better than nothing!

Thanks.

Progress in scanning the RPR

 

Now that the Vintage Tek Museum has its shiny new microfiche scanner, I've
been hoping that the RPR which was identified as the "first" candidate for
scanning would be done.

As I've not heard anything, does anyone have any information ?

Thanks
Dave

Re: Invoice for Services

Roy Morgan
 

Sergey,

I used to get tele[hone invitations to “Take a very short survey”. I would say “I’d be glad to, I charge $ 50 per minute for surveys, so just send me a purchase order and I’ll call you back.”

They were often baffled for a minute.

Roy Morgan
k1lky68@... <mailto:k1lky68@...>

On Sep 6, 2018, at 8:42 PM, Sergey Kubushyn <ksi@... <mailto:ksi@...>> wrote:

On Thu, 6 Sep 2018, scott pawelka wrote:

LOL :)

Dear,

Your last invoice is available.

Thank you for your business - we appreciate it very much.

Wanted cabinet for 2465B with DMM

 

Looking for the large blue metal cabinet that goes on 2465 series scopes with the DMM option. Must be in very good or better condition.

Manuel W4SSB

Re: Wanted cabinet for 2465B with DMM

 

Found a case.

Thanks,
Manuel W4SSB

Re: Wanted cabinet for 2465B with DMM

Dale Chayes
 

Having recently bought a refurbished 2465BDV (which I am very happy with) I am curious what this cabinet looks like.

Can you provide a link to a picture, drawing, etc?

Thanks,
-Dale

On Sep 8, 2018, at 16:31 , Manuel Maseda <mmaseda@...> wrote:

Looking for the large blue metal cabinet that goes on 2465 series scopes with the DMM option. Must be in very good or better condition.

Manuel W4SSB



067-0587-01 Calibrator Fixture

Tomas Alori
 

Hi, I got my hands on one of these. I noticed two things on the gain mode (grid).

A) The separation between the lines decreases when increasing the repetition speed. I dont understand why this would happen and pretty much defeats the purpose of this mode.

B) The lines are kind of dirty, particularly the center line. It looks very thick when untriggered, almost double the size than the others. If I trigger on the lines and 'zoom in' I can see some spikes on the lines, looks like overshoot.

Any thoughts on this? Thanks!!

Re: 067-0587-01 Calibrator Fixture

Craig Sawyers
 

What scope?

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Tomas Alori
Sent: 08 September 2018 23:28
To: TekScopes@groups.io
Subject: [TekScopes] 067-0587-01 Calibrator Fixture

Hi, I got my hands on one of these. I noticed two things on the gain mode (grid).

A) The separation between the lines decreases when increasing the repetition speed. I dont
understand why this would happen and pretty much defeats the purpose of this mode.

B) The lines are kind of dirty, particularly the center line. It looks very thick when untriggered,
almost
double the size than the others. If I trigger on the lines and 'zoom in' I can see some spikes on
the
lines, looks like overshoot.

Any thoughts on this? Thanks!!

Re: 067-0587-01 Calibrator Fixture

Harvey White
 

On Sat, 08 Sep 2018 15:28:14 -0700, you wrote:

Hi, I got my hands on one of these. I noticed two things on the gain mode (grid).

A) The separation between the lines decreases when increasing the repetition speed. I dont understand why this would happen and pretty much defeats the purpose of this mode.
Don't think I noticed this, it may be a bandwidth limit.


B) The lines are kind of dirty, particularly the center line. It looks very thick when untriggered, almost double the size than the others. If I trigger on the lines and 'zoom in' I can see some spikes on the lines, looks like overshoot.
The center line is supposed to be brighter, to identify it. You're
supposed to center it on the screen.

I did notice some fuzzyness on the waveforms. It was due to ringing
on the switching input to the main frame, if you trigger it just
right.

Harvey



Any thoughts on this? Thanks!!


Re: 067-0587-01 Calibrator Fixture

Tomas Alori
 

It's a 7704A mainframe.

I just realized that lines look alright on all repetition rates except 1MHz (fastest). At fastest speed the center line pretty much doubles in size.

Here is what it looks like when I trigger at medium repetition speed: https://i.imgur.com/K53nTaM.jpg

Re: 067-0587-01 Calibrator Fixture

Harvey White
 

On Sat, 08 Sep 2018 18:06:32 -0700, you wrote:

It's a 7704A mainframe.

I just realized that lines look alright on all repetition rates except 1MHz (fastest). At fastest speed the center line pretty much doubles in size.

Here is what it looks like when I trigger at medium repetition speed: https://i.imgur.com/K53nTaM.jpg
I see the same switching transients on a 7904, using the same
standardizer as you have.

Not so sure that it is a problem.

You are, of course, not supposed to sync on the switching rate.

Harvey




Re: 067-0587-01 Calibrator Fixture

Tomas Alori
 

Good to know, seems to be correct then.

Any ideas about the decreasing separation of lines when I increase repetition rate?

Thanks!

Re: 7K series - Conceptual question - What's the 3rd most useful plugin

Scott McGrath
 

I think the vote for least useful plug in needs to be for the 7M13, which allowed you to place text on the screen.

The 7M11 - may be a close second as its a dual 75 ns delay line which uses the scope only for power

Content by Scott
Typos by Siri

Re: 067-0587-01 Calibrator Fixture

Harvey White
 

On Sat, 08 Sep 2018 18:33:13 -0700, you wrote:

Good to know, seems to be correct then.

Any ideas about the decreasing separation of lines when I increase repetition rate?
This does not happen on mine. Try triggering on the switching
frequency and see if you have a change in observable rise time.

It almost sounds as if there's a frequency limit coming into play
here.

Have you another 7000 series mainframe you can try this in? How about
swapping this to a horizontal slot and putting a horizontal sweep
plugin into the vertical slot?



Harvey


Thanks!


Tek 7603 Followed Me Home

bobh@joba.com
 

I have seen this Tek 7603 scope sitting on the table at the Tek Country store for at least three years.  I have tried to power it up and twist some knobs several times over the years with no response.  They have been asking $35 for it and I noticed today there are about 5-6 price stickers stacked up under the current one.

I have been thinking a 7603 would fit into my ensemble if I clear space for it by giving another scope to the Tek Museum.   So, I asked if they would take $25 for it and they did.  So, here it sits with the covers off and the power supply hanging out the back.  It doesn't do nut-tin when powered up.

The main fuse, the fuse on the regulator board and the one on the power supply board above the caps are good. I checked the power supply voltages on the regulator board with the following results:

Volt        VDC      VAC
130       114          11
50            44           5
5            4.396       0.25
15           13.2        1.4
-15         -13.17      1.3
-50          -44          4.8

Unregulated Voltages

50           66            0.16
-50        -52              13
15           24              0.04
-15       -24               0.1
5           12.4             0.05

Seems to be discrepancies between the ripple on the corresponding regulated and unregulated supplies which I don't understand.

The 130 volt supply is partly made up from the 50 volt supply and the voltage on the emitter of Q850 should add about 40 volts but I measure 10.8 volts DC there.  Maybe I see it now, if the 50v supply is at 44 volts there is no way the emitter of Q850 can get to 40 v.

I appreciate any ideas from folks especially those who have been thru a 7603 before.  Haven't had a chance to research the archive but will do that before doing more troubleshooting.  I can't take another scope to the Tek Museum until I know we can bring this one back to service.

Bob.

Re: Tek 7603 Followed Me Home

Chuck Harris
 

What plugins do you have installed?

Without plugins, you might get the green power lamp to
light... assuming it isn't burned out.

-Chuck Harris

Robert Hay wrote:

I have seen this Tek 7603 scope sitting on the table at the Tek Country store for at
least three years. I have tried to power it up and twist some knobs several times
over the years with no response. They have been asking $35 for it and I noticed
today there are about 5-6 price stickers stacked up under the current one.

I have been thinking a 7603 would fit into my ensemble if I clear space for it by
giving another scope to the Tek Museum. So, I asked if they would take $25 for it
and they did. So, here it sits with the covers off and the power supply hanging out
the back. It doesn't do nut-tin when powered up.

The main fuse, the fuse on the regulator board and the one on the power supply board
above the caps are good. I checked the power supply voltages on the regulator board
with the following results:

Volt VDC VAC
130 114 11
50 44 5
5 4.396 0.25
15 13.2 1.4
-15 -13.17 1.3
-50 -44 4.8

Unregulated Voltages

50 66 0.16
-50 -52 13
15 24 0.04
-15 -24 0.1
5 12.4 0.05

Seems to be discrepancies between the ripple on the corresponding regulated and
unregulated supplies which I don't understand.

The 130 volt supply is partly made up from the 50 volt supply and the voltage on the
emitter of Q850 should add about 40 volts but I measure 10.8 volts DC there. Maybe I
see it now, if the 50v supply is at 44 volts there is no way the emitter of Q850 can
get to 40 v.

I appreciate any ideas from folks especially those who have been thru a 7603 before.
Haven't had a chance to research the archive but will do that before doing more
troubleshooting. I can't take another scope to the Tek Museum until I know we can
bring this one back to service.

Bob.






Re: Tek 7603 Followed Me Home

bobh@joba.com
 

So far no plugins and the light isn't lit.  I'll check it.

Bob.

On 9/8/2018 7:43 PM, Robert Hay wrote:
I have seen this Tek 7603 scope sitting on the table at the Tek Country store for at least three years.  I have tried to power it up and twist some knobs several times over the years with no response.  They have been asking $35 for it and I noticed today there are about 5-6 price stickers stacked up under the current one.

I have been thinking a 7603 would fit into my ensemble if I clear space for it by giving another scope to the Tek Museum.   So, I asked if they would take $25 for it and they did.  So, here it sits with the covers off and the power supply hanging out the back.  It doesn't do nut-tin when powered up.

The main fuse, the fuse on the regulator board and the one on the power supply board above the caps are good. I checked the power supply voltages on the regulator board with the following results:

Volt        VDC      VAC
130       114          11
50            44           5
5            4.396       0.25
15           13.2        1.4
-15         -13.17      1.3
-50          -44          4.8

Unregulated Voltages

50           66            0.16
-50        -52              13
15           24              0.04
-15       -24               0.1
5           12.4             0.05

Seems to be discrepancies between the ripple on the corresponding regulated and unregulated supplies which I don't understand.

The 130 volt supply is partly made up from the 50 volt supply and the voltage on the emitter of Q850 should add about 40 volts but I measure 10.8 volts DC there.  Maybe I see it now, if the 50v supply is at 44 volts there is no way the emitter of Q850 can get to 40 v.

I appreciate any ideas from folks especially those who have been thru a 7603 before.  Haven't had a chance to research the archive but will do that before doing more troubleshooting.  I can't take another scope to the Tek Museum until I know we can bring this one back to service.

Bob.