[TenTec] Audio Issues, revisited

[David & Chris Drake]

Last March, I took my omni V down to TT for a checkup and while they were at 
it, I asked them to do something about the overpowering AF gain.  Like you 
say, you could breath on it.....very touchy past "cracking it open".  Almost 
unuseable with headphones unless you have an outboard volume control.  They 
did an audio mod that worked much better when I got home.  I did'nt ask what 
they did, but it worked fine.  So a mod does exist that will greatly help 
the radio.
David

----- Original Message ----- 
From: "Joe Roberts" <jroberts at io.com>
To: "Rick Denney" <rick at rickdenney.com>; "Discussion of Ten-Tec Equipment" 
<tentec at contesting.com>
Sent: Monday, February 11, 2008 11:31 AM
Subject: Re: [TenTec] Audio Issues, revisited


> >>Is this behavior normal with the V?
>
> Sadly, bad audio is "normal' with the V. Painful is more like it.
>
> Yes, there is too much gain in the audio circuit, so you blow your head
> off by even breathing on the AF gain knob. Taper of the AF pot probably
> doesn't help either.
>
> The audible distortion in the V seems to come in earlier in the chain
> due to overdriving the product detector. The W3TS Product Detector mods
> discussed in recent posts address this issue and, in my mind, are a
> major step toward making this radio fun listening. Less hiss and
> clatter, smoother and more defined signal.
>
> W3TS changed a resistor in the notch circuit to recapture some gain lost
> in lowering product detector drive and I found that this value can be
> adjusted or left stock to move the sweet spot on the volume control up
> toward 11 or 12 o clock.
>
> I am a big fan of the W3TS mods. Night and day difference in the
> ergonomics of the operating experience.
>
> See http://www3.telus.net/ve7tk/Omni%20V%20mods.pdf for the lowdown.
>
> Joe N5KAT
>
>
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