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RCA preamp modification
RCA preamp modification
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Old 23rd March 2009, 04:32 PM   #1
rebos123 is offline rebos123  United States
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Default RCA preamp modification

Hi,
I want to modify the attached schematic that is posted in the RCA tube manual. I would like to use the preamp without any bass or treble controls. What do I need to remove in order to use this as a straight preamp?


scheamtic
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Old 23rd March 2009, 05:51 PM   #2
azazello is offline azazello  Bulgaria
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Hi!
You can connect cap 0.1 uf from cathode 1-st triod to 1-st grid /pin 8/.
From pin 8 to ground - resistor 1 mom. All elements around "bass"
and "treble" You must disconnect /0.1mom, 1 mom, 10000, 0.0022,
0,022, 0.1 mom, 220, 1 mom, 0,022/.
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Old 23rd March 2009, 05:58 PM   #3
rebos123 is offline rebos123  United States
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Excellent!

I will try that out..

Thanks.
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