[TenTec] Audio quality issue in Heil headset with Omni V

[Barry N1EU]

Rick does the headphone audio sound bad on just the monitored tx audio
or also on all received audio?  Could it be a lousy monitor circuit on
the Omni V?

73,
Barry N1EU

On 10/13/07, waltk8cv4612amos at att.net <waltk8cv4612amos at att.net> wrote:
> Maybe, you need a capacitor in series with the audio in line as there may be
> battery on that line for an electrolet and the Heil doesn't need that ?
>
> Just a thought.
>
> Looked that Prednizone up on Google and it sure looks dangerous, you got to
> watch those doctors, ask him if he would give this to HIS MOTHER !
>
> Walt K8CV Royal Oak, MI.
>
> ----- Original Message -----
> From: <k9mi at sbcglobal.net>
> To: "Rick Denney" <rwd at iteris.com>; "Discussion of Ten-Tec Equipment"
> <tentec at contesting.com>
> Sent: Saturday, October 13, 2007 4:33 AM
> Subject: Re: [TenTec] Audio quality issue in Heil headset with Omni V
>
>
> > Rick,
> > I use the Heil headset pro using the dx5 element. One thing I've found to
> > quiet down a bit of a hum in them, is turn the tone control fully counter
> > clockwise. My speech monitor does a really good job at around 1/2-3/4
> > open.
> > This was really a nice suprise to have the monitor since the Omni 6 opt 3
> > does not have that feature.
> >
> > Ok, sorry I've read a little more Rick. It's 4am and I can't get to sleep
> > so
> > excuse me if I miss something you've said. Is the mic adapter one
> > purchased
> > from Heil for Ten Tec 4 pin, or one that has been reworked? Either way I'm
> > sure it's right, but just trying to see the differences between mine and
> > yours, if any.
> >
> > Is the sound ok coming thru another speaker with the headphones off. Not
> > sure if you have a hand mic, I don't. So I'm hearing through the headset
> > all
> > the time I'm operating.I'll fire the rig up and see if I notice anything.
> > My
> > only nusiance has been having the tone control turned up. I don't notice
> > any
> > difference on the tone setting when I use the speaker in the 960ps. If I
> > can
> > thing of anything else, I'll send it along. My doctor gave me a
> > prescription
> > for Prednizone, so I'm wired and my blood sugar jumped to 274, so I doubt
> > I
> > get any sleep tonight.
> >
> > 73, Mike K9MI
> >
> >
> >
> > ----- Original Message -----
> > From: "rick denney" <rick at rickdenney.com>
> > To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
> > Sent: Saturday, October 13, 2007 04:46
> > Subject: [TenTec] Audio quality issue in Heil headset with Omni V
> >
> >
> >> As I have worked through integration issues with my new (to me) Omni
> >> V, I'm finally ready to try and understand an issue I've had all
> >> along.
> >>
> >> In my Heil Pro Set headset, the sound from the headphone output of the
> >> Omni is distorted. There is a loud fuzz in the audio.
> >>
> >> I have the monitor volume turned up so that my voice in the boom mike
> >> is about the same as the person I'm communicating with when the audio
> >> is where I want it. But at any volume setting of either AF or the
> >> monitor pot, I get the distortion.
> >>
> >> I don't get the same problem with these headphones plugged into my
> >> Kenwood TS-430, so it doesn't seem to be fault in the headphones.
> >>
> >> The audio does not show clipping on a scope, with the scope lead
> >> connected to the center pin on the headphone receptacle. I mean, I can
> >> MAKE it clip, but that sounds no worse than if I don't, especially
> >> when the processor is enabled. The point is, when I look at a
> >> sine-wave output in the headphones, I don't see the fuzz that I'm
> >> hearing in my ears when I plug the headphones back in. That tells me
> >> that the headphones themselves are part of the problem.
> >>
> >> The sound I'm hearing seems like it would be cause the waveform to
> >> glitch with transients, but I don't see that. The waveforms look
> >> smooth.
> >>
> >> My ears seem to think it's an impedance mismatch between the
> >> headphones and the audio output. It doesn't seem to be in the
> >> transmitted output, but I haven't had enough signal reports to know
> >> for sure.
> >>
> >> Any ideas of things to check?
> >>
> >> Rick, KR9D
> >>
> >> ---
> >> Richard W. Denney, Jr. PE|Iteris, Inc.
> >> Associate Vice President |107 Carpenter Dr. Ste 230 |    703.925.3819
> >> rwd at iteris.com           |Sterling, VA 20164        |Fax 703.471.1757
> >>
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> >
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