[ICOM] Raspy CW note on IC751A

[Adam Farson]

Hi Gary,

Yes, it sounds like the notorious VCO trimmer problem. The 4 plastic HPL VCO
trimmers will need to be replaced with ceramic parts.

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 Gary Nichols
Sent: Monday, June 11, 2007 11:27
To: Icom at Mailman.Qth.Net
Subject: [ICOM] Raspy CW note on IC751A

Good afternoon all, I recently purchased a used IC751A on Ebay and added the
narrow CW 455khz 250 hz filter to this radio.  I find the CW note on RX is
very raspy sounding while the same station on my 746pro is quite pure
sounding.  Any suggestions before I start pouring through manuals and
reported fixes on the internet?  I am seeing this on the 40 meter band but
due to few signals anywhere else don't know if all bands are affected or
not.  Could this be symptoms of defective trimmer capacitors I have read
about elsewhere?

Thanks in advance.de gary, kd9sv

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