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[CQ-Contest] AN ANSWER to SO2R with ONE FT-9000d

To: Contest Internet <cq-contest@contesting.com>
Subject: [CQ-Contest] AN ANSWER to SO2R with ONE FT-9000d
From: Charles H <k4vud@hotmail.com>
Date: Thu, 22 Sep 2016 00:54:51 +0000
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Question about SO2R with ONE FTdx-9000d (or MP)..... response:

SQ7D has posted his answer to using one FT-9000d (or MP) as a SO2R contest 
radio along with amplifiers.

His link is quite complete.
http://www.enduro.idl.pl/FTDX9000_mods/1.htm



I suggest anyone wanting to do this with no amplifiers, i.e., low power 
entrant, it should be possible to use the 9000 selectable antenna sockets,  
good bandpass filters, and the radio programming that lets op to send on one 
radio antenna socket (one of any bands/antenna) WHILE receiving on one of the 
other radio antenna sockets (there are total 4).  This set up is covered in the 
9000 Instruction Book which includes a caution for bandpass filters use.  That 
appears to me to be real SO2R with ONE radio.



It may/should be possible to use the SPE Expert 2K-FA and feed its 2 inputs 
from the two active antenna sockets named above.  At its most simple, this 
amplifier will sense which of its two input sockets should be switched on-line 
and sense which band and antenna socket fits that xmit input.  The amplifier 
will not care if the FT-9000d is the only source for both of its inputs because 
the amp can select via RF input.  The correct output socket is also 
automatically selected for the band RF coming into the amp.



HOWEVER, with the amplifier, it should not be possible to HEAR one band while 
transmitting on any band.   A smarter man will have to look at the SPE Expert 
manual to see if this amplifier's SO2R wiring built into it can do something 
about the need to hear while transmitting.



I have always been puzzled why Yaesu's advertising has not stressed the SO2R 
possibility using ONE radio, built into its 9000 line.



Please let me know further refinements or corrections on this subject.  73, 
Charly


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