[TenTec] OMNI VI plus

Ken Brown kenradiobrown at gmail.com
Tue Sep 29 20:53:33 EDT 2020


Oops, send before finishing. Can your general coverage receiver hear
anything from the Omni VI when transmitting, even it there is not
enough power to register on your wattmeter/SWR meter? Can your general
coverage receiver hear any transmit audio at 9 MHz?

On Tue, Sep 29, 2020 at 2:48 PM Ken Brown <kenradiobrown at gmail.com> wrote:

> Check all the things that are common to both the transmit and receive
> function. If front panel indications all seem normal, VFO readout etc. you
> can probably rule out power supply, or power distribution inside the rig
> (but not for certain) or the VFO PLL system.
>
>  I'd check all of the bandpass filtering and cables that are in between
> the antenna port and the receiver front end. Maybe connect signal source
> (antenna) bypassing those filters and see if the receiver perks up.
>
> How to attack this problem is highly dependent on the tools you have
> available. At the very least a general coverage receiver with some sort of
> sniffer loop or probe would be helpful for listening for various
> oscillators in the radio. A spectrum analyzer would be nicer. Do you have a
> signal generator? If so you can test whether you can input a signal to the
> IF stages and hear it.
>
> Find out what does work and keep checking until you find what doesn't. Can
> you couple a 9 MHz signal into the receiver product detector and hear it?
> Can you couple a 6.3 MHz signal into the 6.3 MHz IF stages and hear that?
> Can you couple a 9 MHz signal into the first IF stages and hear that? Can
> you hear the BFO with your general coverage receiver using a pickup loop
> near the BFO? Can your general coverage
>
> Cleaning contacts is a really good idea and likely to fix the problem.
>
> DE N6KB
>
>
>
>
> On Tue, Sep 29, 2020 at 2:20 PM Bob McGraw K4TAX <rmcgraw at blomand.net>
> wrote:
>
>> Jim:
>>
>> How long has it been since the connectors internally were cleaned?
>> Likely never.   So it is time to unplug each one, scrub the male pins
>> with a Q-Tip with contact cleaner applied and plug it back in.    Do NOT
>> spray anything into the radio.
>>
>> 73
>>
>> Bob, K4TAX
>>
>> On 9/29/2020 6:37 PM, jbrannig via TenTec wrote:
>> > My OMNI died suddenly.No signals on receive and no RF out on
>> transmitEverything else functions as normal..ie. frequency read out, audio
>> noise, bandchange...Any ideas on where to start looking?Tnx es 73JimSent
>> from my Galaxy TabĀ® A
>> > null
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