Harley Benton - PA100 Power Attenuator  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
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javableak
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Post by javableak »

soulsonic wrote: 05 May 2023, 12:46
javableak wrote: 04 May 2023, 18:07 Something that I don't like at all in the PA100 and what I don't like is that the volume for the line output is the same as that of the attenuator, that is, the attenuator is at 1 and the line volume potentiometer is at 10. .. listen with very little volume connecting it to a sound card. I mean, I can't play in my room with the amplifier at maximum power, the attenuator at 0 or 1, because I won't hear anything through the line output!! horror!! :roll:
You can change where the line out connects to the signal. In the schematic, it shows the line out being connected after the wiper of the L-Pad. Move this connection to the input lug of the L-Pad (or to the input jack, might be even better) and then you can turn the attenuator down low without killing the line out signal.

Fixed!! Now if I have a completely independent line output to the attenuated speaker output, I can connect my amplifier to my sound card at full volume, having the speaker attenuation at a completely independent level. :troll:
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