[ICOM] Icom 751A Questions...

[Larry L. Hinton]

Eddy,

You can check the voltage on the lithium cell on that board and make sure it
is still higher than 3V. If not then the board will have to be replaced
unless you can find the binary files necessary to reprogram the RAM after
replacing the battery. 

As for the after-market memory board question. Check out this page from MTS:
http://www.angelfire.com/biz2/mts/ROM-Ram_card.html

His home page is:
http://www.angelfire.com/biz2/mts

Larry
K7YBZ


-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
Behalf Of Edward Swynar
Sent: Monday, October 26, 2009 2:34 PM
To: ICOM Reflector
Subject: [ICOM] Icom 751A Questions...

Good Day All,

I am the owner of an Icom 751A transceiver (serial #04386), which I
purchased brand new in 1989. I have a question about the CW offset / memory
board inside this rig, that I hope someone may be able to assist me with,
from past experience...

Specifically, all of a sudden---and on CW only---the transceiver's output
signal is 2-KHz lower in frequency than the displayed frequency. I noticed
this the other day when I called CQ: all of the stations responding were
some 2.4-KHz below my displayed frequency, and I could work them only by
activating my RIT.

If I wish to answer another station's CQ, I must first set the station's
frequency into BOTH of the rig's VFOs, then offset the transmitting VFO by
some 2.4-KHz, and operate "split".

This does not happen on either AM, or SSB---CW only (naturally, because it's
my favourite mode!).

The rig certainly IS useable this way, but I do NOT like it---I prefer to
use just the one VFO for both receiving and transmitting, just as it
"...used to be."

I've been told by one seasoned veteran in such matters that the memory board
inside the 751A (the circuit with the lithium memory battery) is the
culprit, and should be replaced. Is this always the case...? Have others
ever experienced this same condition, and if so, was the "fix" a replacement
memory board...?
Finally, are replacement after-market memory boards even available for so
old a rig...?

Any & all information is welcomed and appreciated. Thanks in advance, & my
vy

~73~ de Eddy VE3CUI - VE3XZ


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