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Re: [TenTec] Omni VII Digital

To: bcarling@cfl.rr.com, "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] Omni VII Digital
From: "Lee WA3FIY" <wa3fiy@radioadv.com>
Reply-to: wa3fiy@radioadv.com, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Wed, 13 Aug 2014 09:35:42 -0400
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Brian, is there a chance that the interface device is set for Mic level audio 
output instead of 
Line level?   

-Lee-
WA3FIY

On 13 Aug 2014 at 7:52, bcarling@cfl.rr.com wrote:

> It may be "fried" but I seriously doubt it. I was able to work into VK
> this morning on 40m with JT65 and I am now getting 30 - 50 watts
> output. 
> 
> The fault may be in the amount of signal WINDOWS 8 is allowing to come
> out of the laptop.
> 
> I am trying to find if there is some level that is pulled down but
> everything I see is at 100%
> 
> So far so good. I don't want to get 100 watts out and I think that I
> probably don't want any ALC action while running digital modes. The
> speech processor actually helps  alittle in my case.
> 
> On 12 Aug 2014 at 23:12, Bob McGraw - K4TAX wrote:
> 
> > The Omni VII does not have low gain.  But it seems yours has a
> > defective LINE INPUT.  I can run mine at 25% and raising the level
> > up on the computer I get 100 watts of data output, well into ALC
> > range.
> > 
> > Sorry Brian, but from what you say, your LINE INPUT circuit is
> > fried.  This is also evident from your findings that it works OK
> > with the FT857 but not the Omni VII.  In doing a bit of research on
> > the FT857D I find the audio levels for the two radios are very close
> > to the same values.
> > 
> > 73
> > Bob, K4TAX
> > 
> > 
> > 
> > 
> > ----- Original Message ----- 
> > From: <bcarling@cfl.rr.com>
> > To: "Louis Ciotti" <lciotti1@gmail.com>; <tentec@contesting.com>
> > Sent: Tuesday, August 12, 2014 10:49 PM Subject: Re: [TenTec] Omni
> > VII Digital
> > 
> > 
> > > Nothing is smoked. The Tentec just has VERY low gain on that aux
> > > input when used in USB mode unfortunately.
> > >
> > > If I run everything flat out, I can make contacts. OMNI VII Line
> > > Gain 100% Software level at maximum. Laptop gain 100% and OMNI VII
> > > Power set for 100 watts. If I run the speech processor at 40 - 50
> > > I can make more power and more contacts.
> > >
> > > It works. It just doesn't work very well compared to an FT857D.
> > >
> > > If I turn the Keying loop back, on I can use my Centurion amp and
> > > get 30 - 100 watts out depending on the audio frequency. The
> > > laptop produes a peak around 2 kHz which isn't unusual. With
> > > everything flat out 100% I can sometimes now get 20-30 watts out
> > > of the radio that way. Not  great but it will do for now.
> > >
> > > On 12 Aug 2014 at 23:12, Louis Ciotti wrote:
> > >
> > >> On Tue, Aug 12, 2014 at 7:38 PM,  <bcarling@cfl.rr.com> wrote:
> > >> > I don't think it's the signal levels unless there is a bad
> > >> > connection insid ethe Easy-DIGI or her connected it to the
> > >> > wrong pin on the ACC1 cable.
> > >> >
> > >> > There is plenty of audio coming out of the laptop.
> > >> >
> > >>
> > >> Sounds like you are using the speaker output connection,
> > >> typically this output well above line level voltages (I am
> > >> guessing here since I have never probed the outputs on a laptop).
> > >>  I am placing my bet on one of two things...  either something is
> > >> wrong with the interface or you damaged something in the audio
> > >> input circuitry.  It sounds like you are able to use this
> > >> interface with another radio.  If so then something is smoked in
> > >> the Omni audio input.
> > >>
> > >> Sounds like tou have access to an oscilliscope.  Open up the
> > >> interface a probe the audio on one side of the isolation
> > >> transformer (the wire maked PC input) and compare that to the
> > >> output side of the isolation transformer.  Report the
> > >> peak-to-peak values back.  Then probe pin 1 on the interface
> > >> connector.  Should match the output side of the isolation
> > >> transformer.  If possible I would sent it a constant frequency
> > >> tone.  that way you can get a nice sine wave to see on the
> > >> oscilliscope.  If all is good there then it is pointing to
> > >> something in the radio.
> > >>
> > >> Lou
> > >> K2LRV
> > >
> > >
> > > _______________________________________________
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> > > TenTec@contesting.com
> > > http://lists.contesting.com/mailman/listinfo/tentec
> > > 
> > 
> > 
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> 
> 
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