[TenTec] Omni VI+ mic input

[Carl Moreschi]

I have 2 different model 705 mikes - a very old one and a relatively new
one.
The old one requires a battery but the new one works fine on the Pegasus
without one.  Apparently the old 705 requires 9 volts and the new one only
requires 5 volts.


Carl Moreschi N4PY
cjm@qvssoftware.com

----------
> From: Anthony Bowyer <adb1x1@yahoo.com>
> To: Dale L. Martin <kg5u@hal-pc.org>; tentec@contesting.com
> Subject: Re: [TenTec] Omni VI+ mic input
> Date: Friday, December 10, 1999 10:06 AM
> 
> 
> 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
> > >
> > 
> > 
> > 
> > --
> > FAQ on WWW:              
> > http://www.contesting.com/tentecfaq.htm
> > Submissions:              tentec@contesting.com
> > Administrative requests: 
> > tentec-REQUEST@contesting.com
> > Problems:                
> > owner-tentec@contesting.com
> > Search:                  
> > http://www.contesting.com/km9p/search.htm
> > 
> > 
> 
> __________________________________________________
> Do You Yahoo!?
> Thousands of Stores.  Millions of Products.  All in one place.
> Yahoo! Shopping: http://shopping.yahoo.com
> 
> --
> FAQ on WWW:               http://www.contesting.com/tentecfaq.htm
> Submissions:              tentec@contesting.com
> Administrative requests:  tentec-REQUEST@contesting.com
> Problems:                 owner-tentec@contesting.com
> Search:                   http://www.contesting.com/km9p/search.htm

--
FAQ on WWW:               http://www.contesting.com/tentecfaq.htm
Submissions:              tentec@contesting.com
Administrative requests:  tentec-REQUEST@contesting.com
Problems:                 owner-tentec@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm