Jukka, I suggest you build the RF Probe provided with the K2 kit. Use the probe and your DMM to determine where the RF is being lost.
In transmit mode (TUNE), you should find RF in ever increasing levels at the following points: TP1, Xmit Mixer - U10 pin 4 Xmit Buffer - U9 pin 6 (and input to the BPF - junction of D6 and D7 cathode ends) Pre-Driver - Q5 collector Driver - Q6 Collector PA Output - Q6 and Q7 collectors Low Pass Filter input and LPF output. 73, Don W3FPR ----- Original Message ----- I got to test and alignment part 2 last friday. Everything went according to the test procedure. 40 m RX worked well and I spent some time well into saturday night listening band with wire hanging from my balcony. It was quite amazing to hear stations with something I put together myself. Thanks to the great instruction manual! In sunday assembly part 3 was finished and I went on with test and alignment part 3. When I set 2 W and hit TUNE the power displayed stays 0.2-0.3 No change when adjusting L1 and L2. There is quite good peak when adjusting for RX, so I believe BPF is OK. I have been looking for bad solder joints in transformers and LPF. Already did again 40 m LPF toroids. There is some attenuation in the middle on 40 m lpf (crossing of L25, L26, C226, C228 and C229) when doing cheap and dirty signal tracing. Is it normal or may I have some problem there? Bad cap? All bands RX seem to be ok, but same power problem on all. I will check all parts once again and do voltage checks as per troubleshooting. Any other ideas? I don't have access to test equipment, only DMM, XG1 and N-gen. I sent e-mail to Elecraft support already, so I believe I get information from there too. _______________________________________________ Elecraft mailing list Post to: [email protected] http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
