preamplifier usher p 307a
Hi I have a preamp would usher p 307th and adjust the voltages Someone will have the service manual or reference of all voltages.gracias
Maybe a bit late reply, but they seem to be +/-20V and +/-12V.
The voltages are just regulated in two stages of LM317 and 337 I think.
I just bought one and have built a custom PSU for it and I will do a recap.
Original caps are absolute crap.
Maybe replacing the regulators might be beneficial too :)
|All times are GMT. The time now is 09:50 AM.|
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright ©1999-2016 diyAudio