Re: No output on CW with K3

Posted by alsopb on Dec 04, 2010; 2:51pm
URL: http://elecraft.85.s1.nabble.com/No-output-on-CW-with-K3-tp5803041p5803083.html

Had some funny business on 160M with K3 power.

On 1842 +/- a KHz or two the output went to zero.  It was OK elsewhere
in the band.

Redid the TX gain calibration and the problem went away.

However, I know the TX gain calibration had been done after the install
of V4.22.

Odd.

73 de Brian/K3KO


On 12/4/2010 14:33, K4GM- George wrote:

> My K3 using 4.22  will put out full power in TUNE position. The ATU
> works fine and delivers 1:1 swr or close. However, if I switch to CW I
> get zero power out. I switched to 5 watts out and still no power out on
> cw. I hear the sidetone as I key and the radio appears to go into
> transmit mode because the RX is muted.  RX is fine. These conditions are
> the same on all bands 160-10.  Switching to RTTY FSK D or PSK D I do get
> full power out.  AFSK A also works fine.   Suggestions??  Firmware issue
> or hardware problem?  Naturally this happened in the middle of a contest!
>
> George Marzloff  K4GM
>

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