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Old 4th Nov 2020, 1:56 pm   #88
Chris55000
Nonode
 
Join Date: Aug 2007
Location: Walsall Wood, Aldridge, Walsall, UK.
Posts: 2,853
Default Re: Trying to revive a Goodmans One Ten receiver

Hi!

The correct way to determine the resistance of your replacement signal– strength/tuning meter is as follows:–

1) Connect a 100k resistor in series with the meter and connect the meter plus resistor across a variable supply, and adjust the voltage from the supply so the meter reads exactly F.S.D;

2) Switch off the power supply and connect a pot of about 22k across the meter to act as a shunt, and switch on the supply again.

Adjust the 22k shunt pot. until the meter registers EXACTLY half F.S.D. Switch off and disconnect the power supply and shunt pot. from the meter, and then measure the value of the shunt pot. – this will be equal to the internal resistance of the meter movement!

Chris Williams
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It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed!
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