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[TenTec] Omni VI+ mic input

To: <tentec@contesting.com>
Subject: [TenTec] Omni VI+ mic input
From: adb1x1@yahoo.com (Anthony Bowyer)
Date: Fri, 10 Dec 1999 07:06:27 -0800 (PST)
I'm using the 705 (without a battery) with the Pegasus
with no problems. I did have to turn the mike gain up
to about 80% to drive the pegasus sufficiently. I also
have a Plantronics headset (usually used on
telephones) I modified, that works very well with the
Pegasus, but it only has an electret element.

--- "Dale L. Martin" <kg5u@hal-pc.org> wrote:
> 
> I think if you look at the Model 563 Wiring Diagram,
> microphone jack, you will
> see that the GND is, indeed, indicated as being
> connected directly to chassis.
> This was just confirmed on my radio with a voltage
> check (no difference) and
> with a resistance check (dead short) just a moment
> ago.
> 
> 73,
> dale, kg5u
> 
> 
> >Al, a lot of rigs - like my Icom IC-765 - do not
> use the same "ground"
> >for chassis and PTT, for example, and for the audio
> input. Icom "floats"
> >their mic input ground all the way up to the input
> of the first active
> >stage in the mic channel. So, the audio ground line
> at the connector does
> >not show zero ohms to chassis ground.
> >
> >Don't know about Tentec but they might do something
> similar which would
> >account for your finding.
> >
> >72/73, George
> >Al Williams wrote:
> >>
> >> I am happy to see the information on where the
> info about the mike voltage
> >> is located as I looked for it in isolating a
> failure in my 14 mos old
> >> omni6+.  (on my first call in fone SS contest,
> there was no indication of
> >> output).  I have since determined that it works
> if I jumper
> >> the hand held tt mikes ground to chassis ground. 
> The gnd pin on the
> >> tt front panel has no continuity to chassis
> ground.  I haven't yet asked
> >> tt for the proper repair.  Noticed that there
> appear to be some ferrite
> >> cylinders on some to leads from the tt front
> panel mike connector.
> >>
> >> I have started a cross-reference list for the
> omni6+ to help in tracing
> >> circuits from one board to another.  I wonder if
> others have already
> >> done this (besides TenTec!) or are interested. 
> Or am I missing some
> >> means already in place?
> >> alwilliams@olywa.net k7puc
> >
> 
> 
> 
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