This sounds very much like the problem I had with a defective U3 (SSM2165 compressor chip) on the KSB2 board.
One check is to look at U3's voltage at Pin 4. It should be about 1.5 to 1.7V. Mine measured 4.7V. A defective U3 causes the TX to lock on in VOX mode, which is exactly what you observe. The only way out is to power down the K2. The audio is distorted and weak as well. The solution is a new U3. Jack K8ZOA [email protected] wrote: > ((I have K2 s/n 06660 with: KAT100-1, KDSP2, KNB2-R, KPA100-R, KSB2-R, KUSB. > Completed assembly of all and installed all modules. Confirmed power output > on all bands per K2 and KPA100 procedures.)) > > Two problems: > > 1) Holding [VOX] 1 sec to select between normal PTT, SPCH 0.2, SPCH 0.4, or > SPCH 1.0 doesn't work. First push and hold locks up in SPCH 0.2 mode and > further pushes do nothing - "L" is flashing, cannot cancel. Only way to > cancel is > to power down and back up. > > 2) Although power output confirmed on all bands and various power levels (5, > 10, 20, 50, 100 W), I do not seem to get full power on SSB with hand mic (I > suppose that makes sense with SSB, no carrier, if no sound into mic then no > output?) but I see no variation in power if I speak into mic - Observing > power > output with meter on dummy load and also scope in parallel to load. > > 73 DE AF6TB (formerly K6TRB) .. > **************You're invited to Hollywood's biggest party: Get Oscars > updates, red carpet pics and more at Moviefone. > (http://movies.aol.com/oscars-academy-awards?ncid=emlcntusmovi00000001) > ______________________________________________________________ > 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 > > ______________________________________________________________ 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
