Dear Fellows, I Bought a K1 kit at a ham fest several years ago (SN 02197) and recently finished the receiver section. Although audio is strong, as evidenced by the hiss, I have nearly no signal on all 4 bands. I can pump strong rf into it and hear a good side tone/bfo but not strongly. Once, I heard a very faint CW station that was loud on my big rig. But no others. >From the best of my repeated testings, all voltages and resistances provided in the manual match. I have not built an rf probe for my DMM yet but will. However, I also used the signal generator kit from Elecraft (the KXGI?). It is only weakly audible too, and only on the 50 microvolt setting. The AGC setting has no effect. The attenuator kills the weak probe signal when on. One post I found after scouring the Net spoke of a very similar problem that turned out to be a bad 2N7000, in the A Preamp stage, but I can't see how that would affect signal sensitivity, only audio gain. I also put a scope on pin one and pin 4 of U1, the Receiver Mixer. The relative voltage was 3x higher on pin 1 than on pin 4. I would at least have expected gain instead.
Any comments appreciated. 73 Les KE7SLX ______________________________________________________________ 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 Message delivered to [email protected]
