[TenTec] My odd Omni 6+ Autocorrect typos fixed

[Gary J FollettDukes HiFi]

It would seem to me that the best use of the Inrad wide filter would be to leave the original filter in position one in the first IF. The you could easily move a few wires to bypass that filter in receive, and go directly to the 2.8 KHz filter in position 2. This is easy because, in the Omni 6, TenTec cascaded the first filter into the second one. If you use the PIN diodes to go around the position one filter (2.4 KHz) you would take full advantage of the wider filter in position two only in receive. In transmit, everything would remain stock.

Omni 6 radios never sounded all that bad in transmit, only in receive (to my ears anyway). The above method should improve that sound by quite a bit.

BTW: I never observed any significant improvement in Omni 6 audio on receive with the so-called audio improvement mod. I have tried it on several Omni 6’s and never saw much difference.

I believe the filters in the Omni 6 have more in band ripple than they should, and also the positioning of the first IF filter with respect to the second IF filter combines to produce the nasal sound of the omni 6 (non-optimal overlap). No amount of audio chain alteration will correct for that.

I have even taken the audio directly from the product detector and passed this through to an outboard audio amplifier. No real improvement in audio was observed.

This supports the notion that the restricted audio arises in the IF combination of filters and their respective center frequencies and overlap.

The only other place where such restricted frequency response could take place is in the very first ceramic filter that is used prior to any of the 9 MHz roofing filters. I have never tried bypassing this just to see what impact it has on the audio response. I will wait for that until I see how the filter arrangement in this particular Omni 6+ sounds.


I can’t wait to hear how this Omni sounds tomorrow with the high buck 3.1 KHz filters in both IF’s. I have high hopes...

Gary