[ICOM] good older Icom???

[Adam Farson]

Hi John,

Yes, the 735, 745, 751, 751A, 761 and early 765's suffered from the infamous
plastic VCO trimmer problem. I had a later-series 765 (S/N 29XX) which had
ceramic trimmers. Had to replace the trimmers in an IC-751A - a 4-hour job.

My understanding is that the 745, 751, 751A and 761 used the EX-314 RAM
board with lithium-battery backup. In the IC-765, the radio and ATU firmware
are in ROM.

As I recall, the 725, 726, 728, 729, 736, 737 and 738 used ceramic VCO
trimmers. I have owned a 725, a 728 and a 729, and none of these radios ever
showed signs of failing VCO trimmers.

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: Tuesday, June 01, 2004 22:46
To: ICOM Reflector
Subject: RE: [ICOM] good older Icom???


Remember in some models like the 745, 751, 761 and 765
the plastic trimmer caps will eventually need to be
replaced.  You might want to check to see if that has
been done.  And some of those models also have a RAM
board where the rig will go completely dead when the
Lithium battery dies.  This is not a problem in the
761, though.

Along these lines, does the 735, 725, and 728 series
suffer the same plastic caps problem?

73s John NE0P