Thanks, I am trying to find any possible situation which would explain the no functioning step generator, something obvious that might be overlooked such as a missing thermal pad or a wire not making

Ahh, it's all good. The article you mentioned is a rather good read. Interesting that it manages to outperform the newer ones. BTW, anyone can feel free to contact me off list if you happen to have

DW, As I read the manual U722 does not require an insulator. Mine had thermal conductive grease on it. Reference: 577-D1/D2 Service Manual 070-1414-00 - Sec. 8 Pg.12a for Unit Illustration,

This is on the power supply board, does this transistor require a thermal pad? Thanks

I used to have one but the jaws got messed up and I sold it to some guy who wanted a shot at repairing it.  I have no idea what he did with it. I had built a power supply that was entirely

Interesting article, but I guess I should rephrase this...anyone got a DEAD P6042 that I could get the line cord out of? Sean

Teardown: The Tektronix P6042 current probe is a classic | | | | | | | | | | | Teardown: The Tektronix P6042 current probe is a classic Paul Rako The Tektronix P6042 current probe,

Hi all, Among other things I bought at hamfest, I got a P6042 current probe that won't power on. I believe all that may be wrong with it is a bad line cord, as there's no continuity between chassis

Hi Robin, You are referring to the Long Tail Pair which is an incredibly versatile circuit that has been used for over 80 years n tube circuits, transistor circuits, and integrated circuits.

Hi Tom, I just checked on-line dictionaries from Merriam-Webster, Webster's Online Dictionary, Cambridge English Dictionary, Collins English Dictionary, and on and on. They all provide definitions for

Thank you Siggi and Dave I appreciate the information 73 Richard W4MCD

An old saw comes to mind here. Did you know the word gullible is not in the dictionary? Regards

Yes, Designing stuff so that it was, as much as possible, independent of the particular characteristics of a given device as it aged or cane from various suppliers, was one of the great skills of tube

Chuck, As always, I enjoy all information that you bring out in your posts. Thanks! -- Michael Lynch Dardanelle, AR

Thanks for all the info, Chuck. Very informative.

I think BB's were, as well as most any other high quality brand. Tektronix made scopes, not radio tubes. They tested what they sold, and designed their circuits so that they generally were not too

In some uses, the tube type was pretty important. Heathkit was forever banning this brand, or that from use in their amateur radio equipment. This was because there were subtle differences in

Chuck, do you know if the Bugle Boy, etc, tubes were even used in the original builds, or what brand they used originally?

That is something that few people understand. Tektronix was trying to get state of the art performance out of fairly common vacuum tubes..... but with as long a vacuum tube life as they could

I have a QuickStart 8 demo board. This has several interesting signals, including a ~150ps rise clock (with ugly jitter), and the manual has full schematics. The schematics are fairly useless however,