What is the 6m antenna, how far away is it from the xmitter? Sounds like
an issue with a balun or matching overheating with the stress of FT8?
I would hook the K3 up directly to the 6m antenna or the dummy load.
Something is certainly acting odd.
W0MU
On 6/13/2022 2:07 PM, N4ST wrote:
So, received a new KLPA3A & KPA3A from Elecraft in exchange for my old ones
plus $$.
Installed the new KLPA3A & KPA3A and passed LP and HP TX Calibration.
My 6M beam measures 1.06 SWR on analyzer.
CW Key down, 100W, I get 1.2 on external SWR meter and 1 bar on K3S SWR
meter.
With FT8 I'm OK for 1 or 2 transmits and then I get infinity on external SWR
meter and full scale on K3S SWR meter, but full power out.
If I switch to a dummy load, I get zero power out (fold back?)
If I operate FT8 at 8 watts with the beam, I get 1.2 on external SWR meter
and 1 bar on K3S SWR meter and 8 watts out.
Going back to CW full power seems to perform a reset. Everything still fine
in CW, but now FT8 is OK for 1 or 2 transmits and then high SWR returns.
Any advice?
A spur/oscillation in the KPA3A?
A relay stuck/not switching?
My TenTec Eagle is carrying the load for me during these 6M openings.
(46 states worked in last few weeks)
___________
73,
Jim - N4ST
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