And one more thought, with thanks to Bill, K9HZ who
reminded me that relay K1 on the KPAIO3A riser board
can produce the same symptoms if it fails to engage
the 100 watt PA module when the Transmit Power control
is set above 12 watts.
73,
Mike, K8CN
Hi Dick,
Does your K3S receive OK if the TX Power control
is set to less than 12 watts?
Do you have transmitter output if the TX Power
control is set to less than 12 watts?
If the answer to both of those questions is 'Yes,'
then you're looking at one or more of the following
issues in the KPA3A
Just back from Elecraft service. KX3, internal antenna tuner, roofing filter,
2m transverter, Windcamp endplates and cover, Pro Audio Engineering KX3 heat
sink. KXPA100 with autotuner. Have pics and documentation of Elecraft service.
$2900 for the pair, shipped and insured. Vern
3803 kHz, 9PM ET Sunday (0200Z Monday).
Thanks to the following check ins (w) and relays (rel):
Call State Radio/AmpNameSent RST
1 N8SBE MIK4D/KPA500Dave (w),(op)
2 WB9JNZ ILFTdx101d Eric (w) 59+20dB
3 K1NW RI
ISSUE: When the Power Output is increased over 12 watts the receiver
sensitivity decreases several S-Units and power output goes to Zero.
So I'm wondering if this could be something besides dead finals?
TR switch diodes (one or more of D7, D8, D9, D1) on the LPA3?
73,
... Joe, W4TV
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