[ICOM] good older Icom???

[Adam Farson]

Hi Clif,

Thanks for the clarification. I was not aware that the IC-761 used
non-volatile memory. I had peeked into the HPL VCO boxes in my IC-728 and
IC-765, and was under the impression that the trimmers were ceramic. I defer
to your first-hand experience with these radios.

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 Clif Holland
Sent: Wednesday, June 02, 2004 05:07
To: ICOM Reflector
Subject: Re: [ICOM] good older Icom???


1. The 761 doesn't use the EX-314. It is non-volatile

2. The 725, 726, 728, 729, 736, 737 and 738 all use plastic trimmers. Even
the surface mount ones cause problems.

Clif Holland, KA5IPF
AVVid
Authorized Kenwood and Icom Service Center
816 W Shady Grove Rd
Irving, TX 75060

www.avvid.com

1-800-214-5779
972-870-0630 (Local)
----- Original Message -----
From: "Adam Farson" <farson at shaw.ca>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Wednesday, June 02, 2004 1:03 AM
Subject: RE: [ICOM] good older Icom???


> 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
>
>
>
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
>
>


----
Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
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