In message 
<[email protected]>, dated 
Tue, 22 Apr 2008, "Tyra, John" <[email protected]> writes:

>It may be that all the British made guitar amps were three wire 
>products?? I checked some schematics for British made Vox and Marshall 
>amps and all seemed to be three wire plugs.

Agreed: one reason may be that there is no advantage with 230 V mains in 
using a live chassis.
>
>Back in 50's/60's the majority of U.S. made guitar amps were two wire 
>construction with no earth connections. If interested you can see this 
>design in the Fender amps at this site.
>
> http://www.schematicheaven.com/fender.htm

I didn't see any with series-heater tubes and no mains transformer. Four 
50L6Gs in push-pull? (;-)
-- 
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
Murphy's Law has now been officially re-named The Certainty Principle
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

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