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

[waltk8cv4612amos at att.net]

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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