The PROII has a notable "thump" in QSK. An external keyer helps, but ICOM
fixed this in the PROIII.
-----Original Message-----
From: cq-contest-bounces@contesting.com
[mailto:cq-contest-bounces@contesting.com] On Behalf Of barockteer@aol.com
Sent: Saturday, January 01, 2011 11:03 PM
To: cq-contest@contesting.com
Subject: Re: [CQ-Contest] Icom 756PRO as a CW contest rig
The 756Pro is very useable as a contest CW rig. It does have some drawbacks:
1. Close in IMD is not as good as later rigs.
2. DSP rendition of CW has a flutey sound, which is due to
clipping/distortion on rapidly changing signal levels.
Both of these can be remedied. Add an IRC roofing filter kit to get 2KC IMD
up around 79 db. Not the best, but close to the 80db recommended by Rob
Sherwood. Add an outboard filter, like a QF-1A to clean up the audio. If you
are starting from scratch, I'd recommend the Pro2 or Pro3 as they are better
in these regards.
Tony, K1KP
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