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Happy Birthday!

Happy Birthday Knuckles, and I'll echo the hope you (and your mom) are feeling better!!

Happy Birthday Ric!

Happy Birthday Ken!!! I hope you have a great one!

Yes, I've been watching that as well and have enjoyed it.

Happy Birthday!!

Regarding your last statement, Trump was the one who initiated the agreement with the Taliban for the US to withdraw by May 2021: https://www.axios.com/2021/08/20/trump-taliban-agreement-doha-biden Art of the deal my ass...

Happy Birthday Bryan!

It looks like the NC pins of the relay on the board are floating. I wonder if tying these to ground would take care of it?

Are you taking the + signal connection after the relay on the protector board? If you are taking it from the channel boards or before the relay, then I would expect a thump. Taken from the point your headphone jack is wired, it shouldn't thump I wouldn't think.

Good to hear on the caps insanity. Did you use the Kemets? I think those are pretty good, at least I haven't heard of anyone having problems with them though I don't know how long they have been in use and don't recall the history of that brand. I see they are owned by Yageo now. Desoldering those shouldn't have been a big deal. You just need a big enough tip and use a good solder sucker such as an Edsyn or an Engineer. I use a 3.2mm chisel tip on my Hakko 936 iron, and turn the temp up >700F for larger connections such as this. The boards these days are pretty good, particularly 2 layer boards, in terms of reworkability without lifting traces.

Happy Birthday JP!

Those would be fine. Some drop down to the 470uf in that cap as well, particularly if you are trying to get this in a 2U chassis. When I built the one I did for a French user, the 680uf were no longer stocked at mouser in the US. Some discussion in the GRHV thread here:

Happy Birthday Marc!

Happy Birthday!!

Happy belated Birthday!!

Looks like you have to buy 250 of them though...

Not sure where you are at, but Octopart shows this: https://octopart.com/search?q=FJPF2145&currency=USD&specs=0

Happy Birthday Jim!

Happy Birthday!!

For the 335, you'll need dual (2x335 as shown). Are you planning on using a GRLV or the onboard +/-15V supply? For a GRLV, you can use either (depending on version of the GRLV). If your board has space for 3 bridges, you can use either a center tapped transformer, or dual secondaries. It it is only 2, then you need the dual 2x15V secondaries. You are pretty much always safe with dual secondaries vs. center tapped.

That looks like the correct schematic. The boards look fine I think, assuming that the one on the right, which is chopped off in the photo, is for -400V. Given the age of these boards, you might scan completely thru the thread to ensure there were no board errors found. I seem to recall one, which did not affect the boards that I used. Here is a schematic for the GRHV. The 900 board you have listed above is for something else (Megatron or something). Also note there is a separate GRHV thread now as well. goldenreferencehvsic.PDF

These guys have anything that you think might work? https://amscope.com/

Happy Birthday Todd!!!

Happy Birthday!!!