tunghaichuan
August 30th, 2008, 03:08 PM
The VVR (variable voltage regulator) is similar to power scaling in that it allows you to turn down the high voltage to the tubes without lowering the filament voltage (which damages tubes)
This web site has a point-to-point wired version:
http://yeomansinstruments.blogspot.com/2008/07/vvr-greatest-thing-ever.html
There is also a PCB-based version available from Dana aka UR12, but I don't have his email as the SEwatt board is down.
The benefit is that you get a cranked amp sound at low volumes.
Lowering the plate voltage allows the amp to overdrive sooner, and decreases the wattage at the same time.
From what I understand, the tone doesn't suffer as much as with attenuators.
I haven't tried this yet, but I plan on installing it in one of my Valve Juniors.
tung
This web site has a point-to-point wired version:
http://yeomansinstruments.blogspot.com/2008/07/vvr-greatest-thing-ever.html
There is also a PCB-based version available from Dana aka UR12, but I don't have his email as the SEwatt board is down.
The benefit is that you get a cranked amp sound at low volumes.
Lowering the plate voltage allows the amp to overdrive sooner, and decreases the wattage at the same time.
From what I understand, the tone doesn't suffer as much as with attenuators.
I haven't tried this yet, but I plan on installing it in one of my Valve Juniors.
tung