Re: [Elecraft] K2/100 Has No Output on 80 or 40 When Hot

Phil, Good sleuthing. Given the information I had, I would not have suspected K15, but then what do I know!, you measurements are better than my ideas. 73, Don W3FPR Phil-W6TQG wrote: Hi Don, Thank you for your help and information! K15 was the offender - when hot, pins 3 to 4 and also 7

Re: [Elecraft] K2/100 Has No Output on 80 or 40 When Hot

Hi Don, Your ideas and information got me there. I checked K15 to make sure I understood the relay table and it happened to be in the wrong position. 73, Phil W6TQG On Thu, Jun 3, 2010 at 11:24 PM, Don Wilhelm w3...@embarqmail.com wrote: Phil, Good sleuthing. Given the information I had,

Re: [Elecraft] K2/100 Has No Output on 80 or 40 When Hot

Hi Don, Thank you for your help and information! K15 was the offender - when hot, pins 3 to 4 and also 7 to 8 stay connected after changing the band from 20m down to 40 or 80. This cuts off the path through K14 and K13 to C71 and C72. 73, Phil W6TQG -Original Message- From: Don

Re: [Elecraft] K2/100 Has No Output on 80 or 40 When Hot

Hi Don, Thank you for your help. Yes, it appears to be the VFO. The VCO readings at TP1 for 20, 30, 40 and 80m are normal when the K2 is cool, but when hot the readings are near 15,600 for 40 and 17,257 for 80. No wonder I can't transmit or receive! 20 and 30m appear to be normal when hot. What

Re: [Elecraft] K2/100 Has No Output on 80 or 40 When Hot

Phil, The problem will be found in the VFO Range Selection area. Look at the schematic for the RF Board sheet 1. Check the soldering of C71 and C72 and relay K13. It is possible that when hot, the contacts of K13 (and possibly K14) are not making good contact. Set to 80 meters and wait until

Re: [Elecraft] K2/100 Has No Output on 80 or 40 When Hot

Phil, To use the base K2 BNC antenna jack, you must remove the KPA100 - if you attempt to use that jack, the load impedance between the base K2 and the KPA100 will not be correct, and strange happenings will be present. A total lack of power (yes, a display of 0.1 or 0.2 watts is actually no

[Elecraft] K2/100 Has No Output on 80 or 40 When Hot

Every since the last Field Day, my K2/100 (#3713) loses output, and the receiver goes dead, on 40m and 80m when it gets hot. This occurs for power levels of 9 watts and 100 watts. The 30m through 10m bands are OK. I can easily replicate the problem when the power amp is connected, but so far it