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I'm struggling a bit to remain polite as this comment has made me really quite cross. The album has a clear title, the photos have descriptions and comments and all you think worthy of comment is that

It would be nice if the pictures had names and not numbers... Peter ==================== -- mfg HPD

I don't know whether you noticed, but note that a couple of the resistors in the DAC reference are low TC (R2011-R2013?). IDK whether that's really warranted, given that the scope only has +- 2%

The following photos have been uploaded to the Another corroded "B" series A5 board ( /g/TekScopes/album?id=271502 ) album of the [email protected] group. *

Enrique, I will send you some information in an off list E-mail. Zen

Paul, Yes, PR input is always supposed to be HI through R742. I may map the adapter board just to see what pins go where which should make the process of determining whether an 'S73 would be

On 10/01/2022 19:20, n4buq wrote: > > ----- Original Message ----- >> From: "Paul Flinders" <paul@...> >> To: "tekscopes" <[email protected]> >> Sent: Monday, January 10, 2022 1:12:50 PM >>

This one on YouTube: https://www.youtube.com/watch?v=i1UjxgIGues TT

Both of mine are early ones as well. Thanks, Barry - N4BUQ

Hello Everybody, Thank you Michael, glad you like the schematic. I thought the 7603 was going to be "the repair of a lifetime". Turns out it was something simple. Since I'm at it, I am confused with

Added two more files (one in Mandarin, I believe; a Google translation that seems rough and I don't trust; maybe someone with knowledge could make it better). TT P.S. Someone sent me a private E-mail

The manual says (and tek-wiki says) that the HF board was redesigned after a certain serial number.? Mine's the earlier one. Harvey

Yes, on the schematic, the plugin uses C (pin 14) and S (pin 10). As I understand it, those are the CLR and PR pins. Thanks, Barry - N4BUQ

74S73 lacks the PR input - which forces the output HIGH, so it's really "pre-Set" rather than reset, CLR forces the output low. I shouldn't start typing without fully engaging brain but I was busy

I should clarify that both boards have the large, round U329. I hadn't realized that the new chip carried the same ID as the old one. Thanks, Barry - N4BUQ

If they changed to a chip with a RESET, then they would've changed the schematic as well because that line is on the schematics I have and I'm not finding evidence to support that either. Very

Interleaved: Thanks, Barry - N4BUQ

Sorry - that should be in *not* having a reset input. -- Paul

On 10/01/2022 17:47, n4buq wrote: > I have two 7B14 plugins. In one of them, U735 on the A2 board (board number 670-0992-00) has a 14-pin socket. In the other plugin's A2 board (board number

They're very inexpensive in that package, but the shipping is way too high. Best bought in 100 quantities, the price is surprisingly low. Careful with the package, though, there are SOT-23 and SC70