[TenTec] poor audio on OMNI-V

[Bob McGraw - K4TAX]

My reply to this, if one doesn't have a frequency counter capable of 1 Hz or 
better resolution and proper low capacity compensated probes, then they best 
leave the cover screws in place and stay out of the radio.  Anything else is 
a compromise at best.

73
Bob, K4TAX


----- Original Message ----- 
From: "Ken Brown" <ken.d.brown at hawaiiantel.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Sunday, March 29, 2009 2:01 PM
Subject: Re: [TenTec] poor audio on OMNI-V


>
>> he tried to set up the bfo adj's ,but didn't have test gear up to the 
>> task.
>>
>>
> Test gear needed to adjust BFO crystal oscillator frequencies in Omni VI
> (and I am guessing also Omni V)
>
> Method 1, simplest:
>
> 1 eA frequency counter with resolution and accuracy down to about 10 Hz
> at 9 MHz.
> 1 eA high impedance probe
> 1 eA insulated trimmer capacitor adjustment tool
>
> Method 2, if you don't have access to the frequency counter, but more
> difficult:
>
> 1 eA general coverage receiver that can listen to 9.000 MHz and 9.003
> MHz. Doesn't even need to have a BFO.
> 1 eA 100 kHz crystal calibrator that will generate harmonics up to 9 or
> 10 MHz (10 MHz so you can calibrate the calibrator against 10 MHz WWV)
> 1 eA computer with sound card and program that can accurately tell you
> the beat frequency between 9.003 MHz and 90th harmonic of 100 kHz.
> 1 eA high impedance probe
> 1 eA insulated trimmer capacitor adjustment tool
>
> You can build the probe from a small capacitor and a resistor, or you
> may even get enough signal with a little pick up loop on the end of a
> piece of coax. Even a plain screwdriver will do, but will require more
> patience and finesse.
>
> DE N6KB
>
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