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T41-EP V11 PA Board JP1 Reference

Rocco F. Barbaro All Messages By This Member #32528 开云体育 Hi Greg, ? I have a question regarding the JP1 pads between U2 and C24 on the V11 PA board. I have a zero ohm resister there now but not sure why. According to the schematic it looks like it should be a two pin jumper not a resistor pad. I built the board quit awhile back and I can’t find anywhere in my notes about it. I searched the site and couldn't find anything there either. How did you deal with it? I’m just trying to complete the project so I can move on. ? 73 Rocco WJ6U?
Greg KF5N All Messages By This Member #32533 Hi Rocco, the jumper is used only for setting the bias of the IRF510 transistors. It forces the bias voltage generator circuitry to ON.? So it is only used temporarily, in the preliminary tune-up of the amplifier. ? -- 73 Greg KF5N
Rocco F. Barbaro All Messages By This Member #32539 开云体育 Thanks Greg. I will do the bias adjustment and then remove the resistor. ? 73 Rocco ? toggle quoted message Show quoted text From: Greg KF5N via groups.io Sent: Saturday, February 1, 2025 3:46 AM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] T41-EP V11 PA Board JP1 Reference ? Hi Rocco, the jumper is used only for setting the bias of the IRF510 transistors. It forces the bias voltage generator circuitry to ON.? So it is only used temporarily, in the preliminary tune-up of the amplifier. ? -- 73 Greg KF5N

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