[Elecraft] KX3 tuner

[Bill Frantz]

I had a similar problem with my KX3. My problem included no 
receive. The upshot was that the KX3 had been dropped and the 
antenna BNC connector had been pushed in just a little. The 
clearances are quite tight there, and the antenna BNC was 
shorted. I bent the case back into shape, removed the antenna 
connector, and fixed the short. Everything works again.

BTW, the schematic doesn't show the antenna low pass filter. I 
had to look at the circuit board to be sure that when I was 
reading zero ohms resistance across the antenna jack, I was not 
reading an inductor. With the jack disconnected from the board, 
the resistance should be infinity, or at least very high. (When 
it is connected to the board, the resistance is very low.)

73 Bill AE6JV

On 3/27/15 at 11:25 AM, elecraft at mailman.qth.net (George via 
Elecraft) wrote:

>No  longer matches any antenna. I press ATU tune and hear 
>relays working. While  relays click I see 3 watts on led and 
>swr stays at 25.4. Does not matter what  antenna I use. If I 
>bypass tuner and connect a dummy load it shows 25.4 to 1 swr  
>also. Planning a trip soon so need it working.  Thanks 72
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