Flex 6400 Contesting question

Wyatt Law

Rick Hadley - W0FG

Short answer, no.  The 6400 has only one SCU, which makes simultaneous reception during transmit impossible.  Only the 6600/6700 series have dual SCUs.

Ha Gei

That ́s why we bought it, You can look for multi ́s but when you send, you hear nothing

Joe N3HEE

And the 6600/6700 support full duplex (FDX) which is required to hear something while transmitting. 

However you can still find and work multipliers and such with the 6400 without FDX.  Use the needed mults and Q's window in N1MM and pounce on the spots as they populate and then go back to calling CQ.  I do this all the time with my 6600M.  It's called SO2V.  Single operator two VFO's. 

Wyatt Law

Thanks for the reply. If I used the 6600, could I call CQ on 20 and look for multiplayers on 20 simultaneous with the same antenna without blowing myself out ? Or would the second receiver be blown out from receiving the cq from the transmitter, or is there some filtering to prevent this? Thank you