• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

TF110-48/UL in the UK?

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By any chance, are you considering building an "El Cheapo" (schematic attached)? That "piece of iron" ceased being a bargain some time ago. Sowter is UK resident and makes a superb, if costly, product. Their model U064 would work for a triode wired setup, as shown in the drawing.

You will have to work the expense numbers for yourself to see if importation from the US makes sense. The "budget" O/P trafo I currently recommend in building an EC is Edcor's model CXPP25-6-7.6K, which is substantial enough for use with UL mode "finals".
 

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A UL mode PP pair of "12" W. tubes, like the 6BQ5, is good for approx. 12 honest W., in combination with a separate phase splitter. Self splitting limits the O/P to 1/2 of yield from a separate splitter. The claim of an 8 W. O/P is VERY ambitious.
 
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