Some additional data. Voltages at U4, U5 and U6 check out OK. However, the base voltages at Q7 and Q9 are out of spec.
Base at Q7 should be about .7V, but is about .37V and base at Q9 should be about .3V but is about .15V. I am continuing my troubleshooting, but welcome any and all advice. Thanks again. Vin Cortina KR2F K1-4 s/n:1977 KX1 s/n:1476 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Vin Cortina Sent: Thursday, July 06, 2006 11:06 AM To: [email protected] Subject: [Elecraft] KX1 Recvr nearly deaf (Was KX1 receiver alignment) Hi folks, I have resolved the "signals getting loud when I touch the board" mystery with help, but there is still something amiss. Upon further testing, the receiver appears to be profoundly deaf. It does hear some signals on 40, and even some on 20, but not nearly as well as it should. However, I have some clues here. Attaching the antenna does affect the signal level, so the receiver is, to some degree at least, seeing the antenna. Also, the receiver is detecting signals and is on frequency. It hears my signal source OK, and even the few strong external signals are perceptible, but again not nearly as strong as on other receivers here. Another point of note, the background hiss really doesn't sound like what I would expect. No static crashes, not the background noise I would expect. Just a dull hiss like you would hear when raising the volume on a PA system with no input. Another point, although seemingly unrelated, is the AF gain control gives me basically no audio until I get to about 3 o'clock. Then it gets loud very quickly. (This could be a combination of not very sensitive headphones and the audio taper characteristics of the pot, if in fact it is an audio taper.). And then just before it hits maximum clockwise position, I hear a slight "pop" and it gets noticeably louder. I do realize that I probably need more sensitive headphones/ear buds, but this would not explain all of these symptoms. _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
