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Voltage too high !!!
Posted: Thu Mar 26, 2015 10:23 am
by Bluefire_81
Hi !!!
My voltage on V1 and 2 are too high. Does someone have a simple way to lower the supply voltage ???
Thanks
Re: Voltage too high !!!
Posted: Thu Mar 26, 2015 5:29 pm
by neikeel
What amp?
Just V1 and V2?
By how much?
Normally just a series dropper (variable if you like).
Location, size and rating will depend on the above
Re: Voltage too high !!!
Posted: Thu Mar 26, 2015 5:30 pm
by Roe
increase resistor value (10k betw caps)
Re: Voltage too high !!!
Posted: Fri Mar 27, 2015 7:17 am
by Bluefire_81
The amp is a Ceriatone AFD 50W layout built from scratch but my PT have a higher volate on the secondary. Voltage are 50v higher than the spec from nik. I have couple of issue that i need to fix like a little squeal when i engage the extra gain stage.
Re: Voltage too high !!!
Posted: Fri Mar 27, 2015 5:45 pm
by danman
Like the guys mentioned above, you can raise the value of the preamp dropping resistors to bring the voltage down a bit. The squeal that you mentioned is likely caused by lead dress issues. Have you taken the time to chopstick the amp to see if moving the wires around a bit helps to stop the squeal? Some pictures of the wiring would help us to make some suggestions possibly.