[ICOM] Pro3 and Beverage Antennas

[Adam Farson]

Hi Bob,

The RX-ANT circuit in the Pro3 will isolate the RX-ANT jack if the incident
signal power exceeds +10 dBm.

http://www.ab4oj.com/icom/ic756pro3/rxant.html 

Even so, I recommend a grounding switchbox such as the KD9SV Front-End
Saver, which grounds the receive antenna feedline whilst transmitting.

The T/R relay (RL3, CTRL-A Unit) doe not ground the receive RF signal path
during transmit.

Cheers for now, 73,
Adam VA7OJ/AB4OJ


-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
Behalf Of Bob Beatty
Sent: 3-Nov-09 06:27
To: icom at mailman.qth.net
Subject: [ICOM] Pro3 and Beverage Antennas

It is finally cooling off here in Florida and the noise level is dropping.
Time to unroll the beverage and string it up for the lowband season.

Having recently acquired a new Pro3, and not fully understanding the
schematic that came with it, does the relay contact shown in line with the
RX Antenna connection in the RF-B Unit ground the beverage when transmitting
or should I use my external beverage grounder?  The RX Ant function does not
seem to be addressed in the manual.  The nomenclature and reference
designators in the Icom schematic leave something (actually, a
lot) to be desired.

Thanks and 73,

Bob W4VQ