[Elecraft] When Transmitting on FT8 - KPA500 has issues - KD8ZYD

[Bob McGraw K4TAX]

Sounds like the power from the K3 is too high.   Should be about 25 or 
so watts.  Actually, 20 watts drives my KPA500 to 500 watts output on 
all bands.  I trust the SWR as seen by the amplifier is 1.5:1 or less.

Do you get any FAULT LED indications on the KPA500? You can use the 
KPA500 Utility to download and examine the fault table.

73

Bob, K4TAX


On 7/1/2019 8:05 PM, Fred wrote:
> Hi,
>
> I have a K3, P3, KPA500, KAT500 and a SignaLink for sound.  Sometimes when
> I transmit on FT8 running full power on the KPA500, the KPA500 will click
> on/off.  The power doesn't turn on/off, it seems like a relay inside.  The
> power meter will go to about 500 watts, then down to 0, then to abut 500
> watts...and down to 0 maybe once a second.  I have a short video I can send
> if someone would like to see it.  When I bypass the KPA500 and use 50 watts
> or so just on the K3, no issues.
>
> Please let me know if you have any questions.
>
> 73, Fred
>
> KD8ZYD