Update on this - * Worked with the seller to figure out what could be wrong. He had never used this K3 for SSB/voice. Always CW. * The nice folks at Ham Radio Sunnyvale let me try a few kenwood mics to test. None of them worked. * Spoke with Howard (Elecraft Support) and he gave a few pointers on what could be wrong
After discussing with the seller, decided to open the unit and found that on the DSP board attached behind the front panel, a 5/6 pin connector, just between the AF/SQL nobs was completely off its mating black connector. Not a single pin on that connector was in place. Static mat spread, and re-aligned the board. Front mic transmit now works just fine! I was surprised nothing else was wrong with the radio with that entire connector off its alignment. Next problem: After going to factory defaults and all calibration with a dummy load, the radio is not transmitting well on 20 meters. With 12W set, it barely does 5 watts out. Elecraft (Howard) suggests I go through the calibration process again with the filter offset etc. Will try again this evening. I also got a bunch of offline responses on this problem. Thank you all for the support. -- VaibhaV Sharma W7VAI On Tue, Sep 10, 2013 at 12:18 AM, VaibhaV Sharma <[email protected]>wrote: > Hello, > Here is my story - > > Bought a 4 month old K3/10 off ebay (yes) from another radio operator in > Texas. Unit arrived in excellent physical condition except that it won't > transmit any audio using the MH2 hand mic. > > The radio has - > * K3/10 > * KAT3 > * 2.7 kHz 5 pole filter (standard) > * 5ppm oscillator > > I have searched through the tubes and done the following - > * Enabled mic bias > * Enabled L./h. for front mic port > * Adjusted mic gain / CMP / moni levels > * Reset the unit to factory defaults and repeated the above > * Upgraded the unit to latest firmware and repeated the above > > No amount of coaxing or loving is helping. The mic key-up works (TX lit) > but no audio is transmitted. SWR / PO meters don't move at all. > > The radio "does transmit" when - > * ATU cycle is kicked in > * Rear mic port is used with a headset > * CW paddle is used > > I sent a stinker to the ebay seller (awaiting response) but after hours of > debugging, wanted to find out if this is just a dead MH2 hand-mic or could > be an issue with the radio? Is there a way to test the MH2 electret element > separately? > > The problem might just be between the MH2 and my chair and I am here to > learn. > > Thanks in advance, > > -- > VaibhaV Sharma > W7VAI > > ______________________________________________________________ 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
