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Meaning of RV on schematic

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#2
I would guess a variable resistor. If the symbol only has two terminals, then the wiper of the pot would normally be tied to the non-ground end so that if the wiper stops working you get 100k resistance instead of an open circuit. Without seeing the schematic it's hard to tell if a variable resistor makes sense in your circuit.
 
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#3
gordoste said:
I would guess a variable resistor. If the symbol only has two terminals, then the wiper of the pot would normally be tied to the non-ground end so that if the wiper stops working you get 100k resistance instead of an open circuit. Without seeing the schematic it's hard to tell if a variable resistor makes sense in your circuit.
Click to expand...

Thank you for your help, appreciated. 🙂

Here is part of the schematic. Highest resolution available.

Screen Shot 2023-02-06 at 8.59.47 PM.png
 
#4
Yes definitely a potentiometer. It is controlling the volume. The dashed line probably goes to a similar symbol on Channel B which would be labelled RV1-B. This means they are two potentiometers controlled with a single knob - known as a "double gang" potentiometer. The "A" in brackets mean this is an "audio log" (also known as type A) potentiometer - this is explained here. So you need a double gang 100k type A potentiometer.
 
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#5
gordoste said:
Yes definitely a potentiometer. It is controlling the volume. The dashed line probably goes to a similar symbol on Channel B. This means they are two potentiometers controlled with a single knob - known as a "double gang" potentiometer. The "A" in brackets mean this is an "audio log" (also known as type A) potentiometer - this is explained here. So you need a double gang 100k type A potentiometer.
Click to expand...

Of course!

Interesting there is a capacitor between the two, is it built into the volume control?

I appreciate the link, thank you. Will get started reading.
 
#6
Resistor Variable...British Army style nomenclature, or possibly Russian / Spanish.
The symbol is clear, it is a resistor for which value can be changed.

They had a 'Truck 5 cwt.' in the Indian Army, which means 1/4 ton truck....meant Jeep!
5 cwt. means 500 lb., 225 kilos, close enough to call it 1/4 ton.
Our Army still uses a lot of British nomenclature, I had seen this on the ID plate of a Mahindra made CJ-3B long back....
Nissan Patrol was 1/2 ton, there was a Nissan 3/4 ton as well, in the Indian Army.
 
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#10
NareshBrd said:
Zoom out, post a highest resolution copy or photo of the schematic.
It could be optional.
Click to expand...

I was being dumb and forgetting what a capacitor symbol is leading to misreading...

I posted to the forum with the thinking get no replies this fast and while sleeping, then something be getting done. I am amazed at the responses I got! 😳


By the way, some of my Britishness is because some university professors were Indian. Then found out how many Indian words are in English, over 3.000IIRC (there is a tome of a dictionary from the Edwardian era), many are corrupted.
 
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