Hi Guys, My K2 serial#01291, with KSB2, K160RX, KNB2, KAF2, KAT2, KBT2, Rev A control board.
2 days ago i decided to build the KIOS that has been sitting on the bench for a year now. I took a full day to build and fit same. I removed the control board and did the sidetone mod (cut trace) with the two link wires and cap. On the back of the control board thier were two large resistors in series (83ohms each) soldered together bent over and heat shrink around them. They were soldered to RP5 at pins 7 & 10 at least it looked like 10 as it was broken away and not connected or I may have broken it away during dissasembly. Anyway I soldered to 10. I reasembled the radio with the new KIOS. I changed the sidetone in the menu and got side tone. Next I noticed Lo P indicated when I try to tune auto atu on 20m or 30m only. No output. all other bands ok. Also receive is very very weak on 20m & 30m, all other bands ok. I thought maybe the two resistors should have been disconnected, so took them out. no difference. Then thought maybe a problem with the cut trace mod i did on ctrl board. Reversed that no change. So put the resistors back, no change. Last thing I did was take out the resistors. I now have a barely audible sidetone that must have happened somewhere in the last few steps. Looking at the circuit I think 20m & 30m share bandpass filter, maybe i damaged it with the cable from the KIOS when I put the lid on with the new cable? Any pointers appreciated................ John -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-no-TX-on-20m-30m-no-sidetone-after-KIO2-upgrade-Any-Pointers-tp5588028p5588028.html Sent from the [K2] 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
