[Herald1360]

I cobbled up a few LOUD amps in my yoof using large old HT transformers as p-p output ones. Anodes to HT sec outers, HT to centre tap and series up all the heater windings to get somewhere in the ballpark for turns ratio. My noisiest one ran a pair of EL37s. You could get a large 400-0-400 250mA or so surplus mains tranny for pocket money, a proper output one was about ten times as much!