Don't be mislead by the term "ground". First, I'd say define ground. RF
ground especially. A wire running from the rig to a driven ground, water
pipe and etc. has length. Any conductor which has length it therefore a
portion of a RF wavelength and is thus never RF ground. It is always some
value above RF ground. It is, in this case, always DC ground however.
The best example is a VHF 2 M amplifier built on a chassis and 19" panel.
One end of the panel is considered ground while the other end of the panel
is 1/4 wave above ground. So just where is RF ground in this example?
Now back to the original topic. Could the processor be overdriven by the
mike or internal mike preamp which is pre-processor gain. The mike gain is
actually after the processor output. Thus too much processing which will
generate distortion regardless of where the mike level is positioned.
Just a few thoughts.
73
Bob, K4TAX
----- Original Message -----
From: "Rick Williams" <rick.williams@telus.net>
To: "TenTec List E-mail" <TenTec@contesting.com>
Sent: Sunday, August 10, 2003 11:44 AM
Subject: Re: [TenTec] Argo V Distortion
> Well I don't think it's RF in my case. All rigs are well grounded
> (including the Omni V with the Herc) and the Argo audio was distorted with
> the processor on and power levels varied from 1 to 20 watts. The reports
> were similar with the Ten-Tec hand mic and a D-104.
>
> The rig was new and I was trying ALL the features. I tried the processor
on
> 3 (I think) and then got very poor audio reports. Since I don't use the
> processor on my other rigs I turned it off and moved on to trying other
> features! As I mentioned previously, with the processor off the problem
> went away.
>
> 73,
>
> Rick
> VE7ASR
>
> Web site: http://www3.telus.net/ve7asr
>
>
>
> > ------------------------------
> >
To: <tentec@contesting.com>
> > Date: Sun, 10 Aug 2003 07:21:06 -0500
> > From: Robert & Linda McGraw K4TAX <RMcGraw@Blomand.Net>
> > To: tentec@contesting.com
> > Subject: Re: [TenTec] Argo V Distortion
> > Message-ID: <000f01c35f39$dfe112b0$c1b34ace@s0024901093>
> > References: <000001c35ef3$d9e3e180$67e21e43@W4JZ>
> > Content-Type: text/plain; charset=iso-8859-1
> > MIME-Version: 1.0
> > Content-Transfer-Encoding: 7bit
> > Precedence: list
> > Reply-To: tentec@contesting.com
> > Message: 11
> >
> > Don't see why one can't use the speech processor. That's
> > what its there
> > for.
> >
> > I still say that it's RF getting into the mike input. Some
> > mikes and or mike
> > cables present more capacitive values to the mike input thus
> > acting like a
> > bypass capacitors themselves. I suggest to add some .001 mf
> > caps between
> > pin 1, pin 3 pin 4 all connect to pin 2 which is ground on the mike
> > connector. Also, some ferite beads on the leads at the mike
> > connector
> > inside the radio will be useful. That's the suggestion from
> > Tentec for
> > another radio. It works and is very easy to do.
> >
> > 73
> > Bob, K4TAX
> >
>
>
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