Hello guys!
Do not give me crazy please and sorry for my very poor english.
I want to try to remove riaa stage from one of the cheaper phono amp (tc 750 or pyle pp444 etc..)
I would to only use the gain stage and use pc to rip the vinyls using a riaa software.
I read a brief guide here to tweak opamps and discrete phono stage
Stereo Lab - Flat response phono preamplifier
but i can't understand well, how to do in these circuits (i'll buy one of these 3 to do an experiment)
What are the capacitors to be eliminated in these circuits?
1)
2)
3)
Thank you very very much if someone can help me
Do not give me crazy please and sorry for my very poor english.
I want to try to remove riaa stage from one of the cheaper phono amp (tc 750 or pyle pp444 etc..)
I would to only use the gain stage and use pc to rip the vinyls using a riaa software.
I read a brief guide here to tweak opamps and discrete phono stage
Stereo Lab - Flat response phono preamplifier
but i can't understand well, how to do in these circuits (i'll buy one of these 3 to do an experiment)
What are the capacitors to be eliminated in these circuits?
1)
2)
3)
An externally hosted image should be here but it was not working when we last tested it.
Thank you very very much if someone can help me
I would to only use the gain stage and use pc to rip the vinyls using a riaa software.
You'll need the schematics to do a redesign. The article is reasonably correct.
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Yes, lowering resistance of feedback resistor increases the amount of feedback and so lowers the gain. If you just remove the capacitors in your circuits you are left only with the resistors which on their own will set the feedback and the gain will be too high
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A very interesting discussion, I would like to try this..
For the attached circuit, if I follow correctly, I should disconnect C4 and C6 and short C5 and C7 then adjust gain by reducing the value of R14. Would that be right ?
http://www.pcb-audio.com/pcb-audio_com/riaa-super-low-noise-preamp-circuit.jpg
For the attached circuit, if I follow correctly, I should disconnect C4 and C6 and short C5 and C7 then adjust gain by reducing the value of R14. Would that be right ?
http://www.pcb-audio.com/pcb-audio_com/riaa-super-low-noise-preamp-circuit.jpg
Hi Scottjoplin
thank for reply
In the tc750 that have discrete transistors, I have to remove c4,c5?
I've tried today.. but nothing to do if I remove c4 and short c5..no sound..
If I leave on board c5 and remove c4, there is an heavy equalization
if i remove c5 (without short it) there is a very boomy bass equalization
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Then you need to increase the gain by reducing the feedbackI've tried today.. but nothing to do if I remove c4 and short c5..no sound..
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