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@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@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 Tab® A
>> > null
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