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I am sure you in the US are aware and may have experienced this with mailing packages and letters for the holidays, but US mail has been considerably delayed, though it has gotten somewhat better in

A few things are missing from the descriptions. 1. There was a blank module available2. The modules could be user keyed for certain slots3. They could be interconnected unseen in the rear.4. There

I am also interested in a set of boards. Bruce, KG6OJI

FAN to you, too, Giovanni! I agree with Thomas that something rather generic, like the TIP31C that he mentioned, would probably work just fine. Even though it's an obsolete transistor, it still seems

I would also like a set of boards. Thank you for the great project, for the time you spent, and for the clever mechanical and electrical engineering.

Let’s see…. Dennis’s time of xxx hours times a $50.00 hourly rate to do all of this equals $xxxx.xx. Although it is only one book for me you have put in a monumental effort to get all of this

If you might indulge a few inquiries... Did incorrect phasing damage the FG504? Is that something you did to the TM504?... or was it miswired at the factory... or during a "repair, someone else?" Do

This had been done, many times... and there is much ink spilled about it, on this forum... and on the Web... that is... if you are mentioning about something (a cable, or board) that plugs into the

Dennis, you're a saint! Sorry that no good deed goes unpunished! Happy New Year, Tom Sent from my iThing, so please forgive the terseness and typos.

Chuck, Thanks for that as I did not feel qualified to make such a statement, based on my very limited knowledge of the subject. Appreciate that you have confirmed that I am not totally without a clue.

Dennis, THANK YOU. I know that we do not say this enough for all that you do to keep this group running smooth. You are GREATLY appreciated! Sincerely, -- Michael Lynch Dardanelle, AR

That and perhaps what he asserts is nonsense? The grid is most assuredly biased relative to the cathode on this, and probably any, CRT. -Chuck Harris Michael W. Lynch via groups.io wrote:

Hello Many moons ago I saw a topic on here regarding the 2230 and a storage display problem and as far as I could tell it never reached a conclusion. Unfortunately it is the problem I have now...or

This morning I mailed 76 of Peter Keller's books. These went to 72 people in the USA who ordered Peter's book. At the request of our currently shorthanded post office staff I have been asked to wait

David, This may be the source of confusion for those of us not as well versed in these issues. Regardless of your fine technical explanation, TEKTRONIX still calls R1375 "GRID BIAS" on the schematics.

I also would be interested in a set of boards if they aren't too pricey. A source of the mechanical parts is plug-ins for the 5000 series scopes e.g. 5103, 5440, which use exactly the same form factor

" unable to get a visible spot on screen at the +15 V intensity level as indicated in the service manual. I had to crank the intensity up nearly to maximum, and then the trim pot (R1375) for grid bias

Jeff, Can you measure the voltage drop across the diode? That is partially how I discovered the "bad" VR1374 on my 475. You should measure 82V across the diode. Here is my conversation with Chuck

Why bother trying to find unobtainum parts when Tektronix specifies "official" modern/current production substitutes (see crossref document)?

Can't help you with data on those GE transistors but WB Parts seems to have has a pile of them in stock: https://www.wbparts.com/rfq/5961-01-048-5632.html They were used by the military and exist