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Hi all i am making a new pair of monoblock ampllfiers using nos brimar 6v6g,s in pushpull for the power,in the phase and preamp i am using nos russian 6sn7s with gold grids and british ef37a. the design is based off the leak TL12.1 instead of using a gz34 for rectifer i am using a lower powered rusian version of the gz34 mainly because of the cost. the 6v6 is in the 6l6 6f6 family and because the 6f6 is a kt66 by running the cathode ristors a bit lower and a number of other changes i can use a 6v6. the output transformers are the 20 watt altronics line transformers that i have talked about here and for power transformers i am going to use the beacon R08 its about 300 volts a side it might be a bit more i might use a choke but they will need to be a decent size and i don't have a decent size pair. thanks Bruno