TRANSFORMER: A&R 2504 output transformer

Rewired the one of the secondaries on this A&R 2504 output transformer from this Steanes Sound System S311 PA head for an 8 ohm speaker.  

This is very much a note to self for future reference:  approximately zero other people will be interested in this. 

Two bifilar winds in parallel were used for negative feedback.   Wiring them in series increased the impedance to ~8 ohms.   Not my genius idea unfortunately - full credit to Tim Robbins and the work he has published on converting Australia valve PA amps.     

Normally the secondaries are as follows

FB

FB (just under 2ohms)

0

125

250

500

6K P-P, 25w

Paired with EL34 

I’ll tidy up the wires later.   Had some other stuff to do - cyclone on the way….