[Elecraft] KX3 RF out voltage measurements...

[Bill Frantz]

It is best to use CW or Tune or even AM to check power output. 
If you don't speak into the mic in SSB mode, the output should 
be zero, as the carrier is suppressed and with no audio, there 
is no side band.

73 Bill AE6JV

On 6/7/16 at 9:49 PM, kg6mti at sbcglobal.net (David Davis) wrote:

>I might have an RF out issue with my KX3 but I am not sure how to test it.
>
>I have an Elecraft DL1 and a DMM that I figure I can use to check the RF
>voltages and verify the power out. However, I am not sure of the exact
>process on how to do this. If I am keying the mic on SSB do I need to
>speak into the mic to be able to measure the voltages or just key the
>mic with silence? I would assume I need to be speaking into the mic.
>
>The reason I ask this is because if I just key the mic with silence and
>the radio set for 10W with a input power supply of 13.5V DC I measure
>4.7mv DC at the TP1 on the DL1 unit.
>
>If I speak into the mic I see voltages from 11 - 18V DC from the TP1 on
>the DL1 unit. It seems to me that I need to be speaking into the mic. I
>figure if I was checking the RF out in CW mode I would need to key the
>keyer in some fashion.
>
>I know this seems like an elementary level question but I would really
>like to verify the RF power out.
>
>Any information is greatly appreciated in advance.
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