In Reply to: Looking for a GOOD 211 / VT4-C Schematic posted by Super_BQ on July 17, 2003 at 23:47:58:
Don't believe everything you read about high B+ and transmitting triodes. Many folks have been using 845's at low B+ with good results.I played around with 211's and finally settled on a B+ of 825v, 60ma as an operating point. It gave me all of the power I needed and sounded wonderful. It also allowed me to use some "reasonable sized" 15uf/1000v oil caps instead of a few much larger parts I had.
I was more impressed at the sonic differences made by altering the current than the B+. Also the power supply made a substantial difference - liberal use of swinging/smoothing chokes and smallish oil caps sounded way better than larger banks of electrolytics. I'm not sure the 866jr's made any sonic difference, but they sure looked better!
My circuit is very similar to PAE's (see link below)
The single stage driver is sweet and works well.
Mikey's FS-100's are fantastic.
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Follow Ups
- Re: Looking for a GOOD 211 / VT4-C Schematic - Gary Kaufman 08:14:38 07/18/03 (2)
- Re: Looking for a GOOD 211 / VT4-C Schematic - Super_BQ 13:48:34 07/18/03 (1)
- Re: Looking for a GOOD 211 / VT4-C Schematic - Gary Kaufman 05:29:08 07/19/03 (0)