[ICOM] Icom 765 questions

[Adam Farson]

Hi John,

To address your questions:

1. I believe that later units were fitted with ceramic VCO trimmers. I had
S/N 029XX, and as I recall it had the ceramic trimmers - but I could have
been mistaken.

2. The IF Shift kluge, which was hastily implemented in response to a
patent-infringement suit, switches out (bypasses) the 9 MHz IF filter and
activates the IF Shift control when the [IF SHIFT] key is depressed. When
the [IF SHIFT] key is not depressed, the 9 MHz filter is in the IF signal
path, but the IF Shift control is inactive.

The W2ISB PBT Mod reinstates PBT (as in the IC-761) when the [IF SHIFT] key
is not depressed. Depressing the [IF SHIFT] key bypasses the 9 MHz filter as
in an unmodified radio.  The PBT mod is considered a "must-do".

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 John Geiger
Sent: Sunday, September 30, 2007 15:04
To: ICOM Reflector
Subject: [ICOM] Icom 765 questions

I have 2 questions about the Icom 765 that I haven't found an answer to yet:

1 Does it have the plastic trimmer caps problems that the earlier Icom rigs
suffered from?  I think I heard no, but am not sure.

2. QST mentions that when you use the IF shift, it takes the narrow CW
filters out of line. Does this problem still occur if you mod the 765 for
PBT instead of IF shift?  Is there another mod to keep this from happening?

73s John AA5JG
(ex: W5TD, NE0P)
6M WAS #1275, 6m VUCC #1260
2m VUCC #615, Satellite VUCC #129




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