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Reduce signal from preamp.
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Topic: Reduce signal from preamp. (Read 127 times)
flester
Elite
Posts: 169
Chip Points: 14
Reduce signal from preamp.
«
on:
January 19, 2021, 06:47:34 PM »
I have built amp with a starved plate 12au7 preamp feeding a solid-state power amp module. There's a 100k audio pot controlling the signal going to the power amp. Whats the best way to pad the input to the power amp? A resistor in series somewhere?
Sent from my SM-G935F using Tapatalk
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Jazz P Bass
Elite
Posts: 258
Chip Points: 21
Re: Reduce signal from preamp.
«
Reply #1 on:
January 20, 2021, 12:37:14 AM »
Well how about a schematic?
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flester
Elite
Posts: 169
Chip Points: 14
Re: Reduce signal from preamp.
«
Reply #2 on:
January 20, 2021, 04:02:46 AM »
Sorry, here you go. It was late when I posted
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flester
Elite
Posts: 169
Chip Points: 14
Re: Reduce signal from preamp.
«
Reply #3 on:
January 20, 2021, 04:04:27 AM »
I'm running it at 12 v. The preamp and the power amp work fine when tested seperately.
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flester
Elite
Posts: 169
Chip Points: 14
Re: Reduce signal from preamp.
«
Reply #4 on:
January 20, 2021, 04:09:59 AM »
Datasheet for the power amp module
https://www.kemo-electronic.de/datasheets/m032n_14036se.pdf
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Jazz P Bass
Elite
Posts: 258
Chip Points: 21
Re: Reduce signal from preamp.
«
Reply #5 on:
January 20, 2021, 10:38:32 AM »
Not too sure what you want to do.
The input sensitivity of the module is listed as 80mv's.
If your input signal is too hot, knock it down with a voltage divider.
2 resistors. 1 in series. 1 to ground.
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flester
Elite
Posts: 169
Chip Points: 14
Re: Reduce signal from preamp.
«
Reply #6 on:
January 20, 2021, 01:41:45 PM »
Thanks, I was trying that and it was not working but I found a few other issues on my circuit. I'll fix those and try arain
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Reduce signal from preamp.