Just finished my KX1. Unfortunately, it won't produce any output on
transmit. Receive is excellent. Toroids are solid. Board was carefully inspected with good magnifier. All solder joints are solid and clean. I get the following voltages in "tun" mode: Q6: B=0v C=12.67v E=0v Q5: C=12.67v B=1.07v E=.94v Q4: C=1.07v B=1.06v E=.32v Any helpful pointers on debugging this problem will be greatly appreciated. 73, Doug -- K0DXV ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Doug,
Except for the voltages on Q4, the DC voltages look OK. Check R9 and R26. The voltage at both ends of R26 should be near 6 volts. Did you put the jumper between J7 pins 1 and 3? How do the toroid leads look? Well stripped and tinned with a bit of tinned lead showing on the toroid side of the board? Look particularly at T1's green winding. R4 started out fully counterclockwise (if you followed the instructions), and there will be no RF output at that setting. Do you get any RF when R4 is advanced clockwise? 73, Don W3FPR 73, Don W3FPR Doug Person wrote: > Just finished my KX1. Unfortunately, it won't produce any output on > transmit. Receive is excellent. Toroids are solid. Board was carefully > inspected with good magnifier. All solder joints are solid and clean. > > I get the following voltages in "tun" mode: > > Q6: B=0v C=12.67v E=0v > > Q5: C=12.67v B=1.07v E=.94v > > Q4: C=1.07v B=1.06v E=.32v > > Any helpful pointers on debugging this problem will be greatly appreciated. > > 73, Doug -- K0DXV > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.409 / Virus Database: 270.13.71/2331 - Release Date: 08/28/09 06:26:00 > > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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