That "air" may be serving a good purpose, namely preventing different parts of the power supply from interfering with each other. Here's shot of the inside of my preamp power supply, I purposely designed it to keep the B+ supply (front and right side) away from the two high amperage filament supplies (in the back). The B+ transformer and rectifier tube are on the top of the box, so not in the picture. 26 Preamp PS |
Sure, if you insist ;-) 26 Preamp The rectifier tube is a 5Y3G, the preamp section uses balloon 26 and 0A3 and 0D3 gas voltage regulator tubes. The "output transformers" are Bent/Slagle autoformers in parafeed, so they do double duty as volume controls on the output. Remote control of volume and balance are nice as they let me lock in the perfect levels from my listening position. |
And here's a link to my latest project, still in progress... 200WPC SET Amplifier 2300VDC B+ supply...woohoo! . |
Response 34, The amp is in A1 up to about 40W, then it goes into A2. Current draw in A1 is 160mA for the output, then add in up to 200mA grid current in A2 at full power. The output transformers are custom from Monolith Magnetics in Belgium, and weigh 62lbs each, with amorphous cores and teflon insulation. Grannyring, Thanks. I enjoy my hobby... |
Iso, These are my speakers: Infinity RSIIb The oak boxes behind the speakers contain the crossover network, which I removed from the speakers when I rebuilt them with new EMIM diaphragms from Apogee Acoustics, Northcreek and Solen heptalitz inductors, Duelund, Mundorf, Solen and Audiocap Theta caps, Cardas copper litz in Teflon wire...but that's a different project. |
