[ICOM] Re: IC-718 Speech Processor Adjustment

[Gary P. Fiber]

Quoting C Whitaker <whitaker at pa.net>:

> de WB2CPN
>
> The three SM-6's I've seen have all had a problem
> with RF pick up.  Two were real bad, and seem to
> have gotten that way after a few years of use.  (?)
> In all cases the  shack  had excessive RF floating
> around because of the way the operator(s) had the
> antenna wires and tuner arranged.  In one case the
> antenna was too close to the transceiver.  Best to
> run the SM-6 high, and run the rig's mic gain low,
> and on my 751A and 738 the COMP, if not
> over done, helps a lot.  It appears the RF does its
> damage in the Mic, so bypassing the audio leads at
> the transceiver doesn't help much.
>
> 73  Clete
>
I used to have luck by placing a small jumper between the PTT and Mic Audio
ground. They are seperate in the rig and most of the mics. I would instruct
users to install that jumper in the mic connector on the end of the mic cord.
That worked very well for IC-735's when operating mobile as RFI seemed to be a
common  issue. One might try doing the same thing on the SM-6

Gary K8IZ


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Gary P. Fiber K8IZ
GROL PG-19-6691
Washington State Resident