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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment.

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Old 9th Apr 2021, 9:37 am   #1
peterpiper
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Join Date: Jul 2016
Location: Renfrew, Renfrewshire, UK.
Posts: 93
Default RCA pre amp

Hi All, Does anyone have any information (a circuit diagram) for a
RCA LM1-32215 3 valve mono pre amp. I've got one with stability problems, I know what you're saying its only a 3 valve thing 2 ecc81 1 ef86 but its mechanical make up makes it very difficult to follow. All help appreciated.
Peter
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Old 9th Apr 2021, 12:51 pm   #2
GrimJosef
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Default Re: RCA pre amp

There's a circuit towards the bottom of this page http://www.novacon.com.br/audiorcbri.htm.

Your web searching may not have found it because the model number actually starts LMI, not LM1.

Cheers,

GJ
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Old 9th Apr 2021, 1:24 pm   #3
peterpiper
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Join Date: Jul 2016
Location: Renfrew, Renfrewshire, UK.
Posts: 93
Default Re: RCA pre amp

Thanks GJ, you'rE right, I've been searching for the wrong number. I've been working in the dark with this one for 3 days! Thanks very much, Peter
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