Mark; Recheck the ribbon cable connections in the amplifier. This sounds like a connector is off, either to a side or more likely one complete row of pins is off. My suspicion is the 14-pin cable going to the front panel, but it could be the larger cable going to the IO board. You also might try reseating these cables to make sure they are connected properly.
- Jack Brindle, W6FB Elecraft Engineering > On Nov 15, 2015, at 12:24 PM, Mark Goldberg <[email protected]> wrote: > > I will contact Elecraft tomorrow, but posting in case someone > recognizes the symptoms. > > I just put together a new KPA500 kit. When I select Operate, the RX > through the amplifier is significantly attenuated, many 10s of dBs. > The amp will also amplify even with nothing connected to the PA Key > RCA jack. It seems to amplify OK, 35W in gives 400W out. In Standby > the RX and TX pass through the amp as expected. > > It seems to me that it thinks PA Key is enabled all of the time, so > when I switch to operate it is in TX mode immediately. I do not see a > short at the RCA jack. > > Any idea of what is going on? > > Mark > W7MLG > ______________________________________________________________ > 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] ______________________________________________________________ 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]
