My first SET was a Golden Tube Audio 300B and I recently completed my first DIY SET which started as an Angela/WE91 300B. Its current configuration uses a 6SN7 driver for the 300Bs, Electra-Print OT's, Hammond PT and ASC oil caps in the power supply. The bases are S. American mahogany with a Watco Danish oil finish and a stainless steel/cork/mild-steel sandwich top plate. I use these amps on 100db efficient Altecs and have been wrestling with hum lately and finally killed it by reducing gain a little, adding a balanced center tap ground to the 6SN7 heaters and using DC heat on the 300Bs (Schottky bridge, CRC filtering). Tubes and coupling caps seem to always be changing but I'm currently using Mullard GZ37 rectifiers, WE 300B, CBS/Hytron 5692 drivers and RTX coupling caps - next up to try are Russian PIO, Jenson PIO and Jupiter caps.

My next projects in the CAD & parts acquisition stages are a stereo WE417A/45 SET amp and a tube crossover - I want to try bi-amping my Altec 604s. Looking forward to sharing and learning from you guys!

Billfort