Hi Don, Reposting Here I don't think my post are making in via outlook. Anyway here is where I am at.
1. Yes I have 12 volts on the cathode of D14, but no voltage on the anode. D19 had 12 volts on the cathode and 6 volts on the anode. 2. Been over the jumpers about 10 times now. My settings are as follow on page 9. JP1: 1-2 JP2:2-3 JP9: 1-2 1 milliwatt JP3: 1-2 JP4:1-2 JP5 2-3 JP6 2-3 JP7 Shorting block has jumper on it and no shorting block on JP8 Front Panel Board has a jumper on JP1. 3. Not sure if you got my last email. Just in case. I was thinking Q3 might be bad because I had to move it from the front side of the board to the back side. I pulled Q3 and it check good. I went ahead and replace it with a new one. 4. Retouch most of the solder joints around the relays and the pre-amp section. Including the R12. Question (not sure if I have this right in my reading of the diagrams): Q3 (front panel) sends a ground to D14 (main board) when the radio is power up by a positive signal from U4(front panel). The PWR En signal maybe, just wondering if I am reading this right. If a ground appears on the anode of D14 the diode causing forward bias, and the voltage should drop below 12 volts to like 6 volts causing K4 to activate. Thanks David -- View this message in context: http://elecraft.365791.n2.nabble.com/XV-144-Receiver-RF-Amp-Bias-Adjustments-tp6612768p6636816.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
