London Power - Power Scaling with SV1 and RBX (Fixed Bias)

[makinrose]

I've been looking at various V V F  methods and the Power Scaling units.

Can you shed some light on how they work please?

I'm baffled on how they can alter just power tube voltage or can entire amp voltages.

Would it not throw the bias voltages and everything else out of whack?

While it may seem like voodoo once you read TUT4 and TUT6 you'll be amazed at how logical and simple the implementation can be. I too was puzzled until I bought the books. I've found out most of the forum based opinions and concerns stem from not understanding how it works.  

 Altering/controlling voltage is really quite simple---it's just not usually done in tube amps.  All the areas of concern about implementation and tone are addressed and often multiple solutions are presented.  If you want really technical explanation it's worth every penny plus the other chapters are gold mines too.

If you are not wanting to get that involved  the most important thing is that it works and works really well!  Get a London Power Kit...it will have good instructions and technical support if you need it.