Thanks, already took a morning and went past that point.  All pin breakouts, LM7805 regulator and included 3.3 volt regulator if needed.  Idea was not to make extenders (although this could be the

There is pcb-rnd editable data and rs274-x fabbable data for this available free by asking

These are the transistor X-reference docs: http://w140.com/Tek_RPR_151-_Transistors.pdf [ http://w140.com/tekwiki/images/5/5e/Tektronix_Xref_sm.pdf ](

Ouch, didn't realize that.  If I did a board for the TM500 series (or TM5000), I'd be designing the board myself, and not using JAMMA adaptors. Thanks. Harvey

interleaved as usual, next post is next post... I think someone gave you a direct link.  You may have to more or less match with more modern components. Can be one of two things, or perhaps a

Thanks Michael. I couldn’t find it.

On Sat, Jul 25, 2020 at 12:03 PM, Harvey White wrote: Interleaved: > Tek WIKI has, or should have, a list of transistors and their > equivalents, if any. If there is a list like that, I

Just be careful of the upper pins on the JAMA extenders. Some have the a number of the A and B tied together. I didn't notice it and toasted a plugin. Vince. -- K8ZW

TekWiki has several resources. This PDF is a very good source for Cross reference specs: http://w140.com/tek_xref_free.pdf There reference section that contains many other resources. Go to TekWiki

Some JAMMA harnesses have pin 7 missing.  This will prove a problem when the harness is inserted with pin 1 connected to pin 1.  In the TM500 series, from pin 14 on are not dedicated lines, and are

Interleaved: Tek WIKI has, or should have, a list of transistors and their equivalents, if any.  I'd check there if any transistor seems bad when measured.  However. Turn the amplitude down to

The problem is that all the transistors for the output are unknown (to me at least). Besides 1 or 2 2N3607A’s, they all have just a tektronix parts number In the manual, like 151-xxxx-xx, or

If you search on eBay (Search terms: jamma harness,56). you will find many priced $12.00, or so and up, including shipping.

I had a similar problem on another unit, might have been one of the FG series.  The pullup transistor for the output was bad.  I did check the waveforms from the beginning of the output amplifier to

Hi Dennis, Ed: I'm sure you know... but for others... Dr. Dave runs a group that includes Keithley... searchable on Groups.io. Best regards. Roy

craigslist had all that contact, and the scope is sold now.

John, Please provide an email address or contact information where members interested in your scope can contact you OFF LIST. Bruce Gentry and flightsimalex@..., Please contact John off list at

This forum is all about classic Tektronix test equipment, its use, repair, and collecting. This is not a forum about how California chooses to govern itself. What California does or does not do is

Hi Ed, I would think you would have a lot more success finding answers to any Keithley questions you may have in a forum devoted to Keithley. But since Danaher bought Keithley in 2010 and merged it

Ok, now that the TM506 is up and running perfectly again (thanks to all of you who guided me), now I have 3 plugins to fix: FG502, DC503, and SC502. Starting with the FG502. I took a closer look at