[Elecraft] K1 no output on 20 - KFL1-4 problem?

[Greg]

Mike,

I'd sure be curious if you find out what is causing the NO output on 
20 meters. I'm experiencing the same problem and have been doing so 
for some time. I've done a lot of trouble shooting as well but to no avail.

Do you receive signals on 20 meters? I do.
If I plug in the two band (40 and 20 meter) board all is well on 20 
meters so I know the problem lies with the KFL1-4.

In signal tracing I have signals from both 1 and 2 of T1 (pin 1 and 2 
respectfully on P1) but when switch to the 20 meter band these 
readings are considerably lower than the readings for the other 
bands. On pin 2 of T2 I have no readings for 20 meters but good 
readings for the other three bands. Pin 4 of P1 likewise shows no 
signal for 20 meters.

I've checked the board for shorts as well as maybe a bad solder joint 
but all looks good.
Oh yes, my 4 band board worked good for quite a spell before loosing 
20 meters. This looks to be a problem experienced
by several of us that have purchased the KFL1-4 board.

I'm looking for a solutions as well and would appreciate input from 
anyone with an idea. Or, help please.

72,
Greg
KI8AF




At 19:12 09/12/2006, you wrote:
>K1 Serial 02129
>KFL1-4
>No output on 20 meters
>Works fine on other bands.
>
>It used to work.
>
>I did some signal tracing.
>I see signal on pin 1 and 2 of P1 of the filter board for all bands
>I signal on pin 2 of T1 on all bands
>I see no signal on pin 4 of T1 on 20 meters - good signal on all other
>bands.
>
>What could cause this behavior?
>Signal is going through T1 on other bands.
>Could there be something drawing down the signal on 20 meters?
>I looked for shorts and didnt see any on the filter board.
>
>Mike
>KL7R
>
>
>
>
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