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Ryan, I sent you an e-mail directly, check junk if you don't see it. Someone in this group was kind enough to send me an unbuilt Dennis Tillman PCB. I bought the majority of the parts from

There is a revised Service Manual that shows the trimmer on the HV Board. That manual is labeled "REV B May 1980" on the first page of the Table of Contents. So this was a Tektronix factory

Hi, my name's Hachiroku. 1.36V and -1.25V Ref tested OK according to this post: /g/TekScopes/message/13732 Here are the voltage measurements (reference to ground) at the DAC

ebay says I got the last one. Whew! Jim

It's on page 2 in the Modified Products section of the RM15 microfiche set. Only a brief description and no schematics or detailed description. /H?kan

<giuseppe@...> wrote: Option 09 includes the 06 CTT option, plus it allows for using the word recognizer probe. The CTT option gives you a counter/timer integrated to the scope. It

Trying to fix a 5L4N SA - the sweep functions OK, except for single sweep, but nothing else works. Is there a later version of the manual ? A trouble-shooting guide ? The TekWiki one is 'interim'.

"That would cause reduced horizontal and vertical deflection and probably the lack of intensity control." Could you explain why please Tom? I've tested the regulator circuit which is working ok.

Yes I have a few. Did you see the box and write up made by Chuck A? These boards are not meant to interface with an outboard tube tester... they interface directly to a 576 / 577 (maybe all Tek

Update: I built another round of demo boards for the museum, and all but 7 have sold. More details about the demo boards (including the new eBay link for purchasing them) are found

I didn't know that. I just went through the schematics and some photos of the A2 board and found the connectors. It should be an easy upgrade. Thank you for the assist! Bill

AH! thank you very much, sir. What is the title / Tek # of that document?

Here's the exact text on Mod 801C from an old document (microfiche): "Trig, 2 vert & cal paralleled to rear, BNC; ext horiz, sawtooth & gate out paralleled to rear, binding posts; 2 gound posts

Thanks Sigur?ur, I could just try to program a fram, if it won't work I could simply use the eeprom trick and keep the battery(sigh). OTOH, I could just try to replace the battery and if everything

Riga caps replaced. Scope still apart. The "Control Button Error" seems to be in the interlocked DMM push button assembly, specifically the last section of the "CH1V" switch. Ohmmeter checks show

@dc_rawding, I've been looking for Dennis Tillman's boards with no luck, but the effort led me to this thread. At only ~15 months old, I have some hope that it's still relevant... I did check out the

I have repaired and adjusted a 2756P and a 494P. Apart from replacing all old capacitors as recommended by KE5FX document I also checked all RF boards for "suspicuous" components. One thing to look

<giuseppe@...> wrote: I have not done this, but IMHO if any of the 24X5|7A|B scopes allow this, all of them do, as they all have the same processor and the same bus timings. IIRC the

Thank you for that information. That means that we can add the 666 to Dennis' list of tube testers that will work with his VCTC. DaveD KC0WJN [email protected]> wrote:

Dave, The difference between the Eico 666 and 667 was purely to update the types of tubes tested: the 667 added support for 9 pin Novar and 12 pin Compactron tubes, and dropped the sockets for large