A few of us are planning an multi-operator operation for next weekend's CQ WW VHF contest, cobbling together equipment from different places. I am wondering if there are any potential issues (most likely with switching timing) with the following potential setup for six metres:
Radio: K2 (QRP+KXV60, with ground-on-transmit T/R keying output), 8R hold ON, with some reasonable release time for semi-break-in CW)
Transverter: homebrew, 10 watts out max., relay switched, but the relay is faster than the K2, so no sequencer needed normally
Intermediate amplifier: an ancient Lunar 6M10-120P, which is an RF-sensed only (no T/R input available) 100-watt class amp, with K2 drive set to give around 30 watts output. Up to this point the setup has been tested and works fine.
Final amplifier: KPA500
I'd plan on adding a second T/R output from the K2 somehow, so the transverter and KPA500 can be keyed at the same time.
Modes of operation: CW, SSB, FT8, FT4?, MSK144.
I haven't quite got my head around what would happen on non-CW modes where the release delay for the T/R output is zero. In this case the transverter and KPA500 will switch from transmit to receive before the intermediate amplifier does (using its own internal delay timing). Is that likely to cause any issues? Any other timing problems you can think of? Do I need a sequencer?
Would the KPA500 survive 100 watts input if, for some reason, the drive level is set too high by mistake? My understanding is that it should initially switch in an attenuator and then hard-fault (switch to straight-through operation). Correct?
73,
Steve VE3SMA
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