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23rd March 2009, 05:32 PM
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#1 |
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diyAudio Member
Join Date: Jan 2006
Location: Cleveland, OH
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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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23rd March 2009, 06:51 PM
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#2 |
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diyAudio Member
Join Date: Aug 2008
Location: 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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