[TenTec] Inrad audio mod details (Omni 6)?

[Keith Flint]

This mod requires you to replace three components, all SMD chips with either 
new SMD chips (Two Capacitors and one resistor) or
replace them with discrete (old type)capacitors and resistors. AMRAD 
supplies you with both, and complete instructions, well worth the $15.00 it 
costs.
You will have to purchase the kit for full details.
Keith

W7ZAC


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From: "Barry N1EU" <barry.n1eu at gmail.com>
Sent: Monday, May 23, 2011 4:16 AM
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Subject: [TenTec] Inrad audio mod details (Omni 6)?

> Does anybody have the component replacement info from the Inrad audio
> mod for the Omni 6?  I'm talking about their inexpensive component
> kit, not the 2.8Khz filters.
>
>
> On related O6 audio issues, I've found:
>
> 1. the minimum notch frequency with the control fully ccw is 240hz, so
> the notch filter needs to be bypassed if you want to get much low-end
> extension on ssb rx audio.  A gain stage probably needs to be added
> between product detector and dsp if the notch filter IC is bypassed
>
> 2. the dsp is providing -25dB of needed hiss reduction above 3400hz.
> I'm not sure what effect the dsp does/doesn't have on the low end of
> the rx passband.
>
> 73,
> Barry N1EU
>
>