Date   

Re: 2430 service manual

Chuanxiao Li \(Pholink\)
 

Thank Mighty excellent and detailed analysis (3 pages). I think the
TekScopes delete the attachment. If some one need 2430A military version
table of contents (I only have the table of the contents). I will email to
individual.

Li


581A/585A schematics/manual

coldvolcanouk <clintongodleman@...>
 

Please Help!

I need a copy of the circuit diagram for a Tek 581A.
I've got a problem with the vertical amplifier.
I've been told that the circuit diagram for the vertical amp in the 585A is
almost the same so if you have a copy that it might be helpful.
If you have a copy of the complete manual, original, copy or as an
adobe acrobat file I would be very interested.

Thanks!
Clint (London,England)


Re: 2430 service manual

JJ <jimmy.joe@...>
 

Tom Gootee writes:

[Here is some more-detailed information about searching for military
manuals:]

But also note that if you go to that mil download site and do a
search in the "TM Number" field, for 11-6625-3241, which is the TM
(technical manual) number listed in the eBay description, minus the "-
12" suffix, you'll see *three* 2430 manuals with the same prefix,
with suffixes of "-12", "-40", and "-24P". (NOTE that a trailing
search-wildcard is automatically implied, in the logsa mil website's
search fields.)
<lots more snipped...>

Mighty excellent and detailed analysis. Thank you for this post.

JJ


Re: 2430 service manual

Thomas P. Gootee
 

--- In TekScopes@yahoogroups.com, "Chuanxiao Li &#92;(Pholink&#92;)"
<cli@p...> wrote:

I think the military version (TM 09045B-40/2) is different from Tek
service manual 070-6330-00. Attached is "table of contents" of
military version.
(I can't see any attachment.) In general, it *might* be very
different from the Tektronix-printed version or it might NOT be too
different at all. It depends on the manual. Many of the mil-version
manuals for Tek (and other) equipment are verbatim copies of the
commercial manuals, for the most part, often with some added
material. But, in some cases, the military felt compelled to write
the entire manual themselves.


One can not download from www.logsa.army.mil/etms/show_etm.cfm if
you is not contractor of DOD.
Anyone may download any manual from that site, as long as the
manual's URL contains "/A/" after the "...army.mil/etms". Regarding
the Tek 2430A manuals, the three ops/service/parts manuals for the
2430A are not publicly accessible. The fourth one, the 2430A
Calibration manual IS publicly downloadable.

See my related post, in this thread, for information about more-
effectively searching for military service/maintenance manuals.

<snipped>

Regards,

Tom

Tom Gootee, tomg@fullnet.com, http://www.fullnet.com/u/tomg, Jasper,
Indiana, USA


Re: 2430 service manual

Thomas P. Gootee
 

--- In TekScopes@yahoogroups.com, "JJ" <jimmy.joe@m...> wrote:
Chuanxiao Li writes:

There are lot of 2430 service manuals on eBay, price is $5.00.
2430A service manual is rare, start from $100, some one ask
$250. I have looked for long time.

Li
You might ask the eBay guy selling this military version of the
2430A about his 'Operators and Maintenance Manual', with an opening
bid of $10. The Tek 212 military version of a similar manual, down-
loadable from www.logsa.army.mil, has block diagrams, component
layouts, exploded views and schematics. About the same coverage as
a Tek Service Manual.

http://cgi.ebay.com/ws/eBayISAPI.dll?
ViewItem&item=2539646473&category=25409

Jimmy Joe
[Here is some more-detailed information about searching for military
manuals:]

But also note that if you go to that mil download site and do a
search in the "TM Number" field, for 11-6625-3241, which is the TM
(technical manual) number listed in the eBay description, minus the "-
12" suffix, you'll see *three* 2430 manuals with the same prefix,
with suffixes of "-12", "-40", and "-24P". (NOTE that a trailing
search-wildcard is automatically implied, in the logsa mil website's
search fields.)

Most likely, the "-40" manual is the full service manual (but
possibly not including the parts lists), while the "-12" one may be
mostly just an operator's manual. All of the manuals that end
with "P" are just parts-list manuals (except for those with "&P").
But the parts list manuals sometimes also include board and component
layout diagrams and exploded views.

Note that manuals with TM numbers that end with "&P" are usually full
service manuals that also include the parts lists. Manuals with
titles that include "depot" and "general" support or maintenance are
usually full service manuals. Their titles usually ALSO
include "Operator's" and/or "Organizational", and "Support"
and/or "Maintenance". But, if a title includes ONLY "Operator's"
and/or "Organizational" and NOT "Depot" and/or "General", even though
it says "Support" and/or "Maintenance", it's probably basically just
an operator's manual.

Meanwhile, noticing, on the LOGSA site's search-results page (from
above), that placing my mouse pointer on any of the three manual
links (or right-clicking on them and selecting Properties) shows a
URL/address that does NOT have an "A" after the string "etms" in, for
example, http://www.logsa.army.mil/etms/D/042550.pdf (notice that it
has "D" instead of "A"), I then realized that none of the three 2430A
manuals are available to the general public. *** Only manuals with
an "A" in that position in their URLs are available for public
download. ***

Also, noticing, on the search results page, that the descriptions
refer to the scope by its military model designation of "OS-291/G", I
performed a new search, using the "TM Title Text" field, with "OS-
291". The search-results page then also shows a *fourth* 2430A
manual: "070750 TB 9-6625-2251-35 CALIBRATION PROCEDURE FOR
OSCILLOSCOPE OS-291/G." This is a TB (Technical Bulletin). And this
one DOES have an "A" in its URL. So it's publicly downloadable. It is
only the calibration procedure. But it does at least diagram the
adjustment locations and the cal jumper's location.

One could also look for the corresponding NSN (National Stock Number)
for the 2430A, either in the descriptions on the search-results page,
or inside one of the manuals (er, not in this case, though), or, use
the Federal Logistics Database (I bought it, on disks. Don't know if
it's available on line.) In the case of this 2430A variant, the NSN
is 6625-01-258-0022. Eliminating the prefix, "6625-", gives the NIIN
(National Item identification Number) (Note that the "6625" is also
the FSC (Federal Supply Class) code for electronic test and
measurement equipment.). One can then perform another search for
2430A manuals, using the "NIIN Search" field, entering the NIIN
without the dashes, as in 012580022. (I did. Only the same four
manuals are found, in this case.)

From the Federal Logistics 2002 database, I see that there are eight
distinct NSNs for the Tektronix 2430A, each for variations of
options, etc. One could do a search for each of their derived NIINs,
in case there are other 2430A manuals that don't include the
strings "2430A" or "OS-291" in their descriptions and that have a
different TM number "root". (I did. There are none found for any of
the other seven NIINs.)

Also, if you do manage to find (and download) at least one manual for
any piece of equipment, you can usually look in the "References"
section of the manual and find a list of any other available TM
numbers for the unit, except that the calibration manuals (TBs)
often/usually do not include that information, unless it's in the
text at the very beginning of the manual.

Also, inside the service manuals, there are often lists of the test
equipment required for service or calibration, which often include
either NSN or military model designation information that can help in
locating a manual for THAT equipment.

Another fairly-useful military site, with a searchable database of
information about apparently ALL military equipment manuals, both
printed and pdf, and both obsolete and current (but NOT the actual
manuals, themselves), is at
http://www.usapa.army.mil/pamdocs/pam2530_main.htm . That site took
me quite a lot of time and effort to find. (Be warned that I have
heard that it may not work for Netscape users.) Pulling down the drop-
down list for the "Search Field" box and selecting "Title" from the
list and then entering "2430A" in the "Search For" box and
clicking "Submit" brings up another window that shows, eventually,
just the "-40" manual that we first found, above, at the LOGSA site.
Clicking on its TM number brings up a description, which also notes
that it has a "distribution restriction - limited to government
agencies only". It also notes that it is available in electronic form
at the LOGSA website. Doing a second search, for "OS-291", brings up
a list of the same four manuals that were found on the LOGSA site,
and no others. One could also search using the NSN or NIIN (but
*with* dashes, on this website).

I hope that this information is helpful.

Regards,

Tom Gootee, tomg@fullnet.com, http://www.fullnet.com/u/tomg , Jasper,
Indiana, USA

"There are 10 types of people in the world: those who understand
binary and those who don't."


545a , 545b anyone,,

kathnrich <kathnrich@...>
 

If anyone has a 545a or b in the NJ area, I would consider a purchase of the scope itself, no modules or carts are needed.
Thanks,,,Rich


Re: 7B85

Stan & Patricia Griffiths <w7ni@...>
 

This sounds like a CRT problem to me, also.

Stan
w7ni@easystreet.com

----- Original Message -----
From: "Robert Morein" <morepub@comcast.net>
To: "Tekscopes (E-mail)" <TekScopes@yahoogroups.com>
Sent: Tuesday, June 17, 2003 7:43 PM
Subject: Re: [TekScopes] 7B85


I have a 7704A with a focus control that defocuses from center to left,
while the trace is in reasonable focus from center to right.
It actually looks pretty good, though I imagine the trace would be sharper
if the control were fully functional.

Suggestions as to statistically likely causes?








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Re: "Forming capacitors" - means what?

KB6NAX
 

Yes, using a current source is the best way to go. You set its
compliance to the rated voltage of the capacitor and its current to a
value that will not produce excessive dissipation in the cap at full
voltage. Problem is, most reforming goes on with caps still in the
equipment and any one of several or more caps can be leakers that
need reforming time. The nice thing about power supplies with vacuum
tube rectifiers is that when the rectifier's heater is running at
substantially lower voltage the cathode is emission limited and the
plate resistance is high, providing you with a nice current limiting
resistor. Still, a variac is the simplest way to effectively control
the reforming process. Never run the voltage up to fast if you don't
want to ruin a potentially good cap and make yourself more work.

Arden


Tek 115

rprice722000 <rprice72@...>
 

hello, anyone have any info on a tek 115 pulse gen will be glad to
pay.

Thanks! Rob


545b/l20

kathnrich <kathnrich@...>
 

Hi all;
Will a Tek 545b work with a 1L5, or a L20 spectrum analysers?
Thanks,,,Rich


Re: 545b/l20

Craig Sawyers <c.sawyers@...>
 

According to the 1L5 manual it says that a modification is
required for the
1L5 to be used with the 545 scopes.
Absolutely true. And although there is no mention of this in the 1L20
manual *exactly* the same problem occurs, with the same cure.

Craig


Re: "Forming capacitors" - means what?

Miroslav Pokorni
 

The gradual voltage increase seems just to extend time of the process and
does not seem to buy anything effective. Checking temperature is probably
good thing, but you have to be checking very often and be a damn fast gun to
react to any increase.

It seems to me to be much more effective to have a current source that would
limit current to, say 10 mA, and ram full rated voltage to the cap. If cap
shorts, 10 mA at 450V is below 5W, not enough to destroy anything, and if
cap reforms current will drop. That is how caps are made, in first place,
then reforming can be done in same way.

Current source is quite a simple thing, a power FET on a moderate heat sink,
an opamp and a voltage reference of any kind would do the job.

Regards

Miroslav Pokorni

----- Original Message -----
From: "Mark Gulbrandsen" <cinerama84106@yahoo.com>
To: <TekScopes@yahoogroups.com>
Sent: Sunday, June 22, 2003 8:30 AM
Subject: [TekScopes] Re: "Forming capacitors" - means what?


I use an EICO 1030 variable high voltage bench supply to re-form
caps. This not only has adjustable DC voltage output of up to 400
volts but it also has a ma meter on the front panel as well for
monitoring leakage. This unit has been valualable to reform
capacitors,and I agree on the temperature idea..... A warm capacitor
is definately a leaking capacitor. It does take about 48 hours to
properly reform a cap!! I start out at 100 volts(for a 450 volt cap),
50 volts(for a 350 volt cap) then dial it up by about 50 volts every
4 hours or so. When its at the max cap voltage I let it run another
24 hours checking the caps temperature frequently t be sure its not
too hot. Sometimes they will get a tad bit warm, but eventually the
caps temp goes back down to room temperature. Never had one leak or
explode on me this way.
Mark


Re: Replacement probes

Miroslav Pokorni
 

Hello Stan,

Those that you say were crimped are probably for P610X probes. I never tried
to repair those cables, I only replaced them. The P610X were modular and you
could buy box, cable and tip. I do not think those probes were pinnacle of
Tektronix' quality, connectors that mated to cable were pretty poor. It
happened more then few times that probe would quit working again shortly
after cable replacement 'repair'. Mating and unmating cable and end piece of
probe would fix the problem but that was a short term solution, the end
piece needed to be replaced. I found it overly expensive to repair those
probes and at one point I started to buy new probes when an old developed
trouble and just saved old ones to use as spare parts.

The cables that I tried to repair were for P600X. Cable ends were spot
welded and soldering worked with lot of scraping and use of Aspirin as flux.
That soldering taught me to treat probes with respect.

I am not really surprised that Tektronix did their own cable, a probe cable
does not have other applications. The Beldens of this world would not design
and make 10000 yards of probe cable just for Tektronix and hp. Maybe now a
common cable manufacturer might use one of their machines to make one run of
customer designed cable and price it accordingly, there seems to be more
custom runs now than there was in 60s.

Regards

Miroslav Pokorni

----- Original Message -----
From: "Stan & Patricia Griffiths" <w7ni@easystreet.com>
To: "Miroslav Pokorni" <mpokorni2000@yahoo.com>
Cc: "TekScopes" <TekScopes@yahoogroups.com>
Sent: Saturday, June 21, 2003 6:26 PM
Subject: Re: [TekScopes] Replacement probes


Back in the "old days" (before about 1980, or so), Tek used to manufacture
their own probe cables. They did this because, like all components that
Tek
manufactured, they could not find suitable cable on the market from other
manufacturers. If you have ever had occasion to try to repair a Tek
probe,
you probably have noticed that the coax used for the probe cable has a
VERY
fine center conductor and you can't really solder to it either. It is
wire
with distributed resistance and the connections at both ends are crimped.
Repairing a damaged probe cable generally means replacing the probe cable
with a new one. I have no idea what Tek does these days for good probe
cable. My guess is that, by now, other suppliers of cable have figured
out
how to make quality cable.

Tek even made the machines that made the cable. Watching a machine weave
a
braided shield over an insulated center conductor is a process that defies
description . . . so I won't even try it . . . I probably have some
pictures of these huge machines somewhere in my 10,000+ pictures that I
salvaged when Tek threw out their photography archives. In all fairness
to
Tek, they saved a thousand or so pictures and I got the left-overs.

Stan
w7ni@easystreet.com

----- Original Message -----
From: "Miroslav Pokorni" <mpokorni2000@yahoo.com>
To: "Stan & Patricia Griffiths" <w7ni@easystreet.com>
Cc: <TekScopes@yahoogroups.com>
Sent: Tuesday, June 17, 2003 5:59 PM
Subject: Re: [TekScopes] Replacement probes


Hello Stan,

I think in your career you saw more then few probes that were dirty and
customer was asking you how comes that the other guy could make them for
less.

What I noticed about 'third party probes' is that the only specification
given is the bandwidth. I have never seen that any of them go into rise
time, let alone signal aberrations. The rise time spec for this 'Texas
probe
' is just an extension of declared bandwidth, a calculated value. That
seller got quite a bit money for something that is quite questionable.

As for switch, I also wonder about its effects on performance, even at
100
MHz. Tektronix had one of those, too.

I understand that one of tuff things for probe is the cable. When you
deal
with high impedance at cable ends, the effects of dielectric absorption
(charge in dielectric remaining after bringing voltage to zero) become
noticeable and that leads to unwanted ringing.

Regards

Miroslav Pokorni


Re: 545b/l20

Dave Henderson <nr1dx@...>
 

According to the 1L5 manual it says that a modification is required for the 1L5 to be used with the 545 scopes. Sounds like you have to move a wire from the R1153 / R1152 junction to the other end of R1153 which changes the +225 volt supply to the "Vertical Signal Out CF" whatever that means 8^).Sounds like it will work without the mod but you get a lopsided (distorted) display on CW signals.

Dave
NR1DX

At 04:58 PM 6/22/2003 -0700, kathnrich wrote:
Hi all;
Will a Tek 545b work with a 1L5, or a L20 spectrum analysers?
Thanks,,,Rich








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Re: 2430 service manual

Chuanxiao Li \(Pholink\)
 

I think the military version (TM 09045B-40/2) is different from Tek service manual 070-6330-00. Attached is "table of contents" of military version. One can not download from www.logsa.army.mil/etms/show_etm.cfm if you is not contractor of DOD.
j5w23 sold 3 military version service manuals on eBay. The price are:
eBay item number 2533784289 for $51.00 + S/H
eBay item number 2535456274 for $33.56 + S/H
eBay item number 2537390086 for $9.99 + S/H

I think the military version is only maintenance manual???

----- Original Message -----
From: <TekScopes@yahoogroups.com>
To: <TekScopes@yahoogroups.com>
Sent: Sunday, June 22, 2003 9:30 AM
Subject: [TekScopes] Digest Number 773



You might ask the eBay guy selling this military version of the
2430A about his 'Operators and Maintenance Manual', with an opening
bid of $10. The Tek 212 military version of a similar manual, down-
loadable from www.logsa.army.mil, has block diagrams, component
layouts, exploded views and schematics. About the same coverage as
a Tek Service Manual.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2539646473&category=25409

Jimmy Joe


634 video monitor

Craig Sawyers <c.sawyers@...>
 

Hi folks

I've ransacked every source that I know of to get a manual for the 634 video
monitor; even Deane Kidd doesn't have one! Anyone on the list got one that
they would either part with (for cash of course!) or would lend me so that I
can take a copy?

Thanks and regards

Craig


Re: I need a manual for a 545B...

KB6NAX
 

I've had a 545B as one of my favorite bench scopes going on 15 years. For
the size of the manual and how much you saved on your purchase I would
recommend buying an original manual from one of the test equipment manual
vendors. Probably $50-$75 you are looking at. No sweep? Or no beam (no
HV)? Good luck.

Arden

----- Original Message -----
From: "nywfre" <pat@mrblooze.com>
To: <TekScopes@yahoogroups.com>
Sent: Sunday, June 22, 2003 2:45 AM
Subject: [TekScopes] I need a manual for a 545B...


Hello out there--

I just acquired a beautiful 545B with a bunch of plugins, including,
happily, the calibrator, and a passle of tubes. It was 'working'
when I acquired it through a third party (for the princely sum of
$10, so I'm hardly complaining..), but when I fired it up found no
sweep.

Does anyone have a manual that they can tell me how big a tome I'm
looking at copying? Cost permitting, I'll pay the possessor of said
manual to reproduce it at some print shop and post it to me. At the
moment, even a scan off the appropriate section of the scats would be
wonderful, as something to start from.

Any help is appreciated...

Oh, and does anyone out there have a spare power supply for a 2246
that they're willing to part with, or know where I might find one?

Tks...

Pat





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Re: 2430 service manual

Don Black <jeans@...>
 

If you mean the LOGSA site, there's a variety of information, some classified,
some not. You need a password to download the operating manual for a Patriot
Missile for instance but much of it if free to download.
I guess the Tektronix 2430A and 2465B hasn't been released yet, perhaps they're
concerned about copyright or something. They seem to be the only two Tektronix
that's barred at LOGSA.
The 2665B service manual and 3430 user manuals are available from
<http://www.teknetelectronics.com/> to download.
Don Black.

JJ wrote:

Ed Fallon writes:

-----Original Message-----
From: ed_fallon [mailto:edfallon@cablespeed.com]
That military site looks interesting for downloading manuals but
whats up with the "authorized access only" warning screen? I didn't
go any further once I saw that.

-Ed
It's beyond my ken why a anyone would place such an ominous warning
about 'Authorized Access Only' and then put downloadable information
on a server that is accessible to all the world with a 'net connection.

Jimmy Joe




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Re: 7B85

Stan & Patricia Griffiths <w7ni@...>
 

I'll take a guess . . .

This is probably for rear panel external triggering and to be effective, the
mainframe has to have a mating connector installed with a cable routed to
the rear panel. There is probably an internal switch installed somewhere
inside the 7B85 that allows you to switch from the front panel external
trigger to the rear panel external trigger. This is just a guess.

Stan
w7ni@easystreet.com

----- Original Message -----
From: "Morris Odell" <morriso@vifp.monash.edu.au>
To: "Tekscopes (E-mail)" <TekScopes@yahoogroups.com>
Sent: Tuesday, June 17, 2003 6:47 PM
Subject: [TekScopes] 7B85


Hi all,

I have a 7B85 with option "JA". It seems to work as normal, but there is a
coax cable inside leading to a pin in one of those little plastic holes in
the block above the plug-in edge connector. Neither my 7603 nor my 7834
seems to have a mating connection for it.

Anyone know what this option is?

Thanks,

Morris




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Reforming Capacitors.....

cinerama84106
 

Here is an interesting link about the process and Proceedure of
reforming caps......
Mark

http://www.vcomp.co.uk/tech_tips/reform_caps/reform_caps.htm

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