To resolve this QSK problem I decided to replace the slower mechanical T/R relay in the Henry 2K-4 with high speed Gigavac model GH1-HAM (datasheet) 5KW RF 6ms 12VDC SPDT vacuum relays. Not only will this resolve the issue of having the IC-7700 transmitting into an open circuit every time I key the transmitter, it will also allow the amplifier to run full QSK break-in. I found the GH1 vacuum relays actually switched in 3ms. The 6ms is the manufacture’s worse case value.
High power HF combiner OM10C The high power combiner OM10C is designed for all short wave amateur bands from 1.8 to 29.7 MHz and maximum 10kW PEP output power.
Specification of OM10C:
OM4001A HF Linear Amplifier The OM Power model OM4001A is an automatic power amplifier, designed for use on all short wave amateur bands from 1.8 to 29.7 MHz (including WARC bands) and all modes. It is equipped with a two pieces...
BURST-2000A LDMOS Power Amplifier "BURST-2000A" - Russian LDMOS HF Linear Power Amplifier - 2,2 KWT. 1.8 - 50 MHz. with (CWS) cooling water system.
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