UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

georgesgiralt · 27th Nov 2020, 11:15 pm

Hello,
I want to repair my old preamp/amp and I need a millivoltmeter for this. I own an old tube beast a CRC MV124. Alas it is not working any more and I won't debug it (due to lack of time, documentation, etc...).
So I need an adapter allowing me to measure between 1mV full scale to, say 50V full scale and display, either, on a Metrix 462C multi meter, or on a Russian galvanometer or on a Chinese multimeter. Bandwidth between 20 Hz to 20kHz will be plenty enough.
I thought I had a schematics somewhere using op amps but can't find it.
So do you, by any chance, have something for me ?
Thanks a lot in advance for your help and advice !

27th Nov 2020, 11:15 pm	#1
georgesgiralt Hexode Join Date: Jul 2008 Location: Toulouse, France Posts: 406	Need A/C millivolt meter. Hello, I want to repair my old preamp/amp and I need a millivoltmeter for this. I own an old tube beast a CRC MV124. Alas it is not working any more and I won't debug it (due to lack of time, documentation, etc...). So I need an adapter allowing me to measure between 1mV full scale to, say 50V full scale and display, either, on a Metrix 462C multi meter, or on a Russian galvanometer or on a Chinese multimeter. Bandwidth between 20 Hz to 20kHz will be plenty enough. I thought I had a schematics somewhere using op amps but can't find it. So do you, by any chance, have something for me ? Thanks a lot in advance for your help and advice !