On Fri, 10 Dec 2004 00:25:23 -0000, nicolas wrote: > Hi, > Following reports of poor transmitted audio, and aided by a fellow K2 > owner we set about a little investigation. > What happens.. > Raspy, clipping?, (distorted by RF?), almost Dalek (For UK readers!!), > sounding transmit audio. > We checked the various board, joints etc, swapped things with the known > working K2 and established.. > 1. The issue is with the control board, when swapped, it gives the same > fault in either K2. > 2. No obvious component problems. > 3. Another interesting observation on both K2's, was how the 12v rail > modulates when you transmit?
>> What do you mean by "12v rail modulates" ? Where are you seeing this effect ? >> Assuming that you are using the same PSU for both K2's, then I would check >> all the supply rails on the control board 12V, 8A and 5A with a DVM >> and a scope. It sounds like a power rail rather than an RF problem. >> Look for any effects on the rails whilst whistling into the mic. >> Also check around the ALC circuitry. >> 73 >> Stewart G3RXQ > Any suggestions, where / what to look for on the control board, or other > ideas? > Thanks!!! > Regards > Nicolas > www.m1hog.com > > --- > Outgoing mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.806 / Virus Database: 548 - Release Date: 05/12/2004 > > _______________________________________________ > 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 _______________________________________________ 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
