[TenTec] problem with no audio control on OMNI V

[MadScientist]

The volume control in this radio is simply a variable resistor between pins 6 and 7 of U 10, the audio amplifier.

If you were to place a 0.1 uF capacitor directly across these two pins, you would put the volume control at full on unless the pot is shorted internally to ground.

At full clockwise, the pot resistance to ground should be quite high, roughly the resistance of the pot. If it isn’t, the pot is shorted.

I have some of these if you need one.

Getting at the volume pot is actually easy - you just remove the top two Phillips screws holding the panel assembly to the radio and the whole panel hinges open.


Gary

W0DVN

> On Jan 18, 2019, at 9:30 AM, Brian <brianpepperdine at sympatico.ca> wrote:
> 
> I had used headphones at the start, so I don't think it is jack corrosion, as the level is what it is at all points of control  - RF pot does increase audio to lowest level of  nothing or the highest level  of available audio level ... I think, to me, the fact that the audio pot does not alter the  constant low audio level higher or lower (does not reduce to zero level of audio)  is some indicator of something.
> Brien VE3VAW
> 
> 
> 
> ________________________________
> From: Brian <brianpepperdine at sympatico.ca>
> Sent: January 18, 2019 2:29 PM
> To: ten tec list
> Subject: problem with no audio control on OMNI V
> 
> 
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