Saturday, August 11, 2012


Delighted to find confirmations on LotW from HK0NA on Friday. Worked them back in late January and February on 160-10m, all three modes - CW, Phone, RTTY.

It's a great feeling to go from not having a country confirmed at all, to having them confirmed on nine bands and three modes. Kudos to the DXpedition team for uploading to LotW so soon after the event.

Friday, August 3, 2012

Broken K2/100

OK. At least I know what's wrong. It appears that one of the chips on the KPA100 fed by the 78L05 has failed and is drawing so much current that the regulator only puts out about 1 volt.

It isn't U1 -- the PIC chip that runs the KPA100. That one is at least socketed and was easy to remove and test with it out of the circuit. And it isn't U3 -- the 78L05 regulator. I pulled it off the board and tested it, it works OK.

It is either U4 -- the MAX1406C chip, or U6 -- the EL5146. My bet is on the EL5146. Now to order parts....