Weirdly, I ordered from JLCPCB and they had from @e-fortier original Gerber file and they sent me back a request to change similar to post #492 but I approved them to make the change and ended up with functional boards. I have at least 1 pair left if anyone is interested PM me and I'll send them out USPS only.
As a side note....
If I did PCB design I'd probably put two three-watt resistors in parallel for the bias resistor rather than one 3-watt , which got hot and melted the cheap clip-on probes from my multimeter (not that I would have thought of this during design). Of course, I left them on for an hour or more. 5 watt is a good idea too. I might also order a multi-turn pot for the bias although the single turn does work. (I biased at .75 volts)
As a side note....
If I did PCB design I'd probably put two three-watt resistors in parallel for the bias resistor rather than one 3-watt , which got hot and melted the cheap clip-on probes from my multimeter (not that I would have thought of this during design). Of course, I left them on for an hour or more. 5 watt is a good idea too. I might also order a multi-turn pot for the bias although the single turn does work. (I biased at .75 volts)
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...then..
What is the number of manufacturer or Mouser for this R1 resistor?
Is this wirewound resistor proper?
https://www.mouser.kr/ProductDetail/Vishay-Dale/NS005R5000FB12?qs=d8Z78VFXGhkUcvPP/DEc/w==
