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I don't see any duplicate pages in the TekWiki copy of the 7934 manual.

Also, the May 1986 PDF ends with section 7. My copy (Aug 1987) has sections 8 and 9.

I'm a bit confused. It would be helpful if someone out there has an original, printed copy of the May 1987 (unrevised) copy of the manual.

DaveD
KC0WJN

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Thanks.

DaveD
KC0WJN


On Sat, Mar 22, 2025 at 07:24 mst3krules via groups.io <mst3krules=
[email protected]> wrote:

Pages 459 - 467

Bob

Pages 459 - 467

Bob

Could you send to me the logical PDF page numbers of the pages to which you
refer?

Thanks.

DaveD
KC0WJN


On Sat, Mar 22, 2025 at 07:15 mst3krules via groups.io <mst3krules=
[email protected]> wrote:

I forgot to mention but I also noticed that there appears to be duplicate
pages 6-16 to 6-20 and 7-18 to 7-21 at the rear of the manual. I did not
compare them to see if there was any differences.

Bob

I forgot to mention but I also noticed that there appears to be duplicate pages 6-16 to 6-20 and 7-18 to 7-21 at the rear of the manual. I did not compare them to see if there was any differences.

Bob

Dang. I forgot to write that I also added the missing page 3-1 to the May 1986 revision.

DaveD
KC0WJN

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All,

Ok, I've unbound my 7934 manual and I started scanning the missing pages.

It turns out that my manual copy is Revision May 1986, but *Revised Aug 1987*.

Per Bob's email below:
Pages x, 9-12 and 9-24 are the last pages of their respective sections and are blank pages in my manual with no page numbers (but the facing pages are consistent).

My section 7 ("Replaceable Electrical Parts") is much different than the section 7 in the May 1986 revision. Updating the May 1986 revision with my section 7 would make the former revision inconsistent, so I do not plan to do that. My manual has no page 7-61; my section 7 ends at page 7-54. However, I would guess that page 7-61 in the May 1986 revision is the last page of section 7 and therefore blank and not numbered.

I have added pages 6-22 and 6-23 to my local copy of the May 1986 revision that is on the TekWiki site. I think that that omission is the only true error in the TekWiki manual revision. I will update the copy on TekWiki, hopefully later today (I am on EDT). In the meantime, I can send a copy of pages 6-22 and 6-23 to anyone that can't wait for me to update the copy on TekWiki. Please PM me in that case. kc0wjn at gmail dot com.

Comments and questions welcome; those should probably be handled privately at this point so as to not clutter up the list.

DaveD
KC0WJN

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On Friday, March 21, 2025 at 06:57:58 PM PDT, Roy Thistle via groups.io <roy.thistle@...> wrote:

On Thu, Mar 20, 2025 at 06:54 PM, Craig Cramb wrote:

Where did you come up with the Tek-derived US Army service manual

It's on Tekwiki, at least it is there now.

--
Roy Thistle

On Thu, Mar 20, 2025 at 06:54 PM, Craig Cramb wrote:

Where did you come up with the Tek-derived US Army service manual

It's on Tekwiki, at least it is there now.

--
Roy Thistle

Andy,

By your video, the high voltage condensers are ceramic. It is possible/likely one or more of the 5W blue resistors will be open. I have seen these open in 500 series before due to being run close to or over the rated wattage.

Mark

Thank you.

Sigh. I guess I'll have to unbind my copy and add those to the copy on
TekWiki.

DaveD
KC0WJN


On Fri, Mar 21, 2025 at 17:56 mst3krules via groups.io <mst3krules=
[email protected]> wrote:

Looking through the manual, of the pages with numbers, the following are
missing:

X, 3-1, 6-22, 6-23, 7-61, 9-12, 9-24

Bob

Looking through the manual, of the pages with numbers, the following are missing:

X, 3-1, 6-22, 6-23, 7-61, 9-12, 9-24

Bob

It occurs to me that, if I am going to unbind my 7934 manual (re-binding is
a pain) to scan pages 6-22 and 6-23 in order to update the copy on TekWiki,
it would be useful to know if there are any other pages missing from the
online copy. This would require someone to go through the online manual
page-by-page to verify that those two pages are the only ones missing. I
don't have time to do that right now. If someone is willing to do that,
please let me know ASAP.

DaveD
KC0WJN


On Fri, Mar 21, 2025 at 16:25 Dave Daniel via groups.io <kc0wjn=
[email protected]> wrote:

I should probably update the PDF of the manual on the TekWiki site. That'll
take a bit longer.

DaveD
KC0WJN


On Fri, Mar 21, 2025 at 16:08 Dave Daniel via groups.io <kc0wjn=
[email protected]> wrote:

I have been skimming this thread, since I have a 7934, but not really
paying close attention to it.

I have an original 7934 manual from Tektronix, dated May 1986. It does

have

pages 6-22 and 6-23. I can scan and upload them or send them privately.
It'll take me a day or two to do that.

DaveD
KC0WJN


On Fri, Mar 21, 2025 at 15:51 Bill via groups.io <wpgold3637=
[email protected]> wrote:

After looking at 3 totally different scans of the same printing of the
7934 manual I don't believe that pages 6-22 and 6-23 were in any

manuals

from the first printing. My three scans show file sizes of:
1. 112,361 KB Title "7934 Oscilloscope (1986) WW.pdf" 464 pages
long
2. 210,637 KB Title "7934.pdf" (SECURED)
470 pages long
3. 72,903 KB Title "Tektronix-7934-service,user-ID2530.pdf"

501

pages long
#3 in the "schematics" section, the pages have been scanned 1/2 page

at a

time for those pages that were probably "B"size in the original manual.

In

some cases they were scanned in 1/3 page at a time.
#2 in the "schematics" section the pages are scanned the whole page at

a

time.
#1 same as #2.
There are other differences in the "schematics" sections with sizes of

the

pages, when I go through the pages at the same magnification settings

of

the Adobe Reader. #2 has some protection applied and is "SECURED". I
can't use the "Snapshot Tool" from the "Tools" menu. In one scan I can

see

the holes for the spiral binding which the others don't have on the

same

page. There are other differences on the placement of some texts. But
that could be from the scanning process. I don't know.
My conclusion and best guess is that, believe it or not, Tektronix did

NOT

print those missing pages in the first printing dated "May 1986".

GASP!

There are pages of "CHANGE INFORMATION" in the back of each scan. One
shows signs of being stapled while others don't show this.
However is anyone can find those missing pages please scan and post

them.

Bill

"In the hv section, see if the .01mfd condensers are ceramic or tubular" Are the ones you refer to high voltage types IE 1KV +?

Yesterday I pulled the CRT in order to clean the X & Y plates connecting pins. I cleaned the CRT, it wasn't too mucky. I checked the connections at the start but always a bit wary of them due to corrosion etc elsewhere in the scope. I tried to removed the oxidation of the pins with 800 grit wet & dry as well as twisting by hand a small drill bit inserted into the spade type crimped connections.

I noticed the trace had moved to the right a bit after this & whilst trying to take V measuements on the X/Y CRT pins my meter probe slipped, big sparks & a small bang, switched off. I'd vaporized a wire lead to V574B and a 47r grid stopper. Interestingly the trace is now the opposite of what it was stuck on the RHS.

This leads to once again suspect the horizontal amplifier but I'll still check the EHT supplies etc & make sure all connected components are in spec or caps not leaky. I can test up components up to 10KV using a vintage equivalent of a Megger. Here's a link to the videos so far - not the best filmed & produced films but should show whats what.

Thanks again for all your help & support, Andy.

I should probably update the PDF of the manual on the TekWiki site. That'll
take a bit longer.

DaveD
KC0WJN


On Fri, Mar 21, 2025 at 16:08 Dave Daniel via groups.io <kc0wjn=
[email protected]> wrote:

I have been skimming this thread, since I have a 7934, but not really
paying close attention to it.

I have an original 7934 manual from Tektronix, dated May 1986. It does have
pages 6-22 and 6-23. I can scan and upload them or send them privately.
It'll take me a day or two to do that.

DaveD
KC0WJN


On Fri, Mar 21, 2025 at 15:51 Bill via groups.io <wpgold3637=
[email protected]> wrote:

After looking at 3 totally different scans of the same printing of the
7934 manual I don't believe that pages 6-22 and 6-23 were in any manuals
from the first printing. My three scans show file sizes of:
1. 112,361 KB Title "7934 Oscilloscope (1986) WW.pdf" 464 pages
long
2. 210,637 KB Title "7934.pdf" (SECURED)
470 pages long
3. 72,903 KB Title "Tektronix-7934-service,user-ID2530.pdf" 501
pages long
#3 in the "schematics" section, the pages have been scanned 1/2 page at a
time for those pages that were probably "B"size in the original manual.

In

some cases they were scanned in 1/3 page at a time.
#2 in the "schematics" section the pages are scanned the whole page at a
time.
#1 same as #2.
There are other differences in the "schematics" sections with sizes of

the

pages, when I go through the pages at the same magnification settings of
the Adobe Reader. #2 has some protection applied and is "SECURED". I
can't use the "Snapshot Tool" from the "Tools" menu. In one scan I can

see

the holes for the spiral binding which the others don't have on the same
page. There are other differences on the placement of some texts. But
that could be from the scanning process. I don't know.
My conclusion and best guess is that, believe it or not, Tektronix did

NOT

print those missing pages in the first printing dated "May 1986". GASP!
There are pages of "CHANGE INFORMATION" in the back of each scan. One
shows signs of being stapled while others don't show this.
However is anyone can find those missing pages please scan and post them.
Bill

I have been skimming this thread, since I have a 7934, but not really
paying close attention to it.

I have an original 7934 manual from Tektronix, dated May 1986. It does have
pages 6-22 and 6-23. I can scan and upload them or send them privately.
It'll take me a day or two to do that.

DaveD
KC0WJN


On Fri, Mar 21, 2025 at 15:51 Bill via groups.io <wpgold3637=
[email protected]> wrote:

After looking at 3 totally different scans of the same printing of the
7934 manual I don't believe that pages 6-22 and 6-23 were in any manuals
from the first printing. My three scans show file sizes of:
1. 112,361 KB Title "7934 Oscilloscope (1986) WW.pdf" 464 pages
long
2. 210,637 KB Title "7934.pdf" (SECURED)
470 pages long
3. 72,903 KB Title "Tektronix-7934-service,user-ID2530.pdf" 501
pages long
#3 in the "schematics" section, the pages have been scanned 1/2 page at a
time for those pages that were probably "B"size in the original manual. In
some cases they were scanned in 1/3 page at a time.
#2 in the "schematics" section the pages are scanned the whole page at a
time.
#1 same as #2.
There are other differences in the "schematics" sections with sizes of the
pages, when I go through the pages at the same magnification settings of
the Adobe Reader. #2 has some protection applied and is "SECURED". I
can't use the "Snapshot Tool" from the "Tools" menu. In one scan I can see
the holes for the spiral binding which the others don't have on the same
page. There are other differences on the placement of some texts. But
that could be from the scanning process. I don't know.
My conclusion and best guess is that, believe it or not, Tektronix did NOT
print those missing pages in the first printing dated "May 1986". GASP!
There are pages of "CHANGE INFORMATION" in the back of each scan. One
shows signs of being stapled while others don't show this.
However is anyone can find those missing pages please scan and post them.
Bill

After looking at 3 totally different scans of the same printing of the 7934 manual I don't believe that pages 6-22 and 6-23 were in any manuals from the first printing. My three scans show file sizes of:
1. 112,361 KB Title "7934 Oscilloscope (1986) WW.pdf" 464 pages long
2. 210,637 KB Title "7934.pdf" (SECURED) 470 pages long
3. 72,903 KB Title "Tektronix-7934-service,user-ID2530.pdf" 501 pages long
#3 in the "schematics" section, the pages have been scanned 1/2 page at a time for those pages that were probably "B"size in the original manual. In some cases they were scanned in 1/3 page at a time.
#2 in the "schematics" section the pages are scanned the whole page at a time.
#1 same as #2.
There are other differences in the "schematics" sections with sizes of the pages, when I go through the pages at the same magnification settings of the Adobe Reader. #2 has some protection applied and is "SECURED". I can't use the "Snapshot Tool" from the "Tools" menu. In one scan I can see the holes for the spiral binding which the others don't have on the same page. There are other differences on the placement of some texts. But that could be from the scanning process. I don't know.
My conclusion and best guess is that, believe it or not, Tektronix did NOT print those missing pages in the first printing dated "May 1986". GASP! There are pages of "CHANGE INFORMATION" in the back of each scan. One shows signs of being stapled while others don't show this.
However is anyone can find those missing pages please scan and post them.
Bill

Based upon the command syntax that is documented in the 070-9650-02 manual, I have begun writing a Node-Red interface to fully control the system using a dashboard2 interface. I use the RS232 port into hardware running Node-Red ( as Raspberry Pi will do). The dashboard can be formatted to be mobile phone friendly, so I can control the unit with a handheld "remote" Kinda cool. I can post the .json file once I get it more user friendly, if there is any interest.

Hello Peter,

On my scope U4 is not mounted so there is no setting.
On U3 I got the following configuration:
KD24 KD25 KD26 KD27 KD28 KD29 KD30 KD31
U3 0 0 0 1 1 0 0 0

Any suggestion how to setup the scope to TDS640 with the configuration?

Regards,

Wamor

Craig, here’s one link:



Ron