[Elecraft] K2 Distorted TX audio on 10m and 12m only

[Ron D'Eau Claire]

Hi Jeff: 

First, note that 12 meters (along with 60, 30 and 17 meters) will NOT be
used for Field Day. Those bands are "off limits" to contests. 

But your K2 should work fine there and on 10 just the same. 

Does this occur with a good dummy load attached? That sounds a LOT like RF
feedback. Such feedback is often much worse on higher frequencies. The same
basic audio/modulator stages of the K2 are used on *all* bands, so if your
audio is good on the lower bands, they are working properly. 

The other possibility is some sort of instability in the output stages on
the higher frequencies. That is quite unusual in Elecraft rigs, but when it
happens it is often the result of a poor load at the antenna. Again a dummy
load might identify that by making the problem go away. 

When checking with a dummy load. Be certain you have a good 50 ohm coaxial
cable between the rig and the load (it's a good idea to use a different
cable).

Ron AC7AC 

-----Original Message-----

My K2 sounds fine on all bands on all modes, both TX and RX except for 10
and 12m. On those two bands, RX is fine, but TX sounds horrible on all
modes, LSB, USB, and CW. It puts out full power though. Any ideas?

I'd really like to use this at field day. Of course 12 and 10 probably won't
even be open...

Thanks,
Jeff

-- 
73 de n1ywb