In Reply to: RE: Do you need PSE ???? posted by dave slagle on May 26, 2012 at 15:53:32:
Dave,
You stated this above:
"I call the bias shift claim for the inferior sound of DC "bunk" since 60 times a second you have a range of bias shift with AC that is 2.8X that of DC."
Now, let me ask you Dave ..... how can a 6B4G be considered "symmetrical" when the filament is DC operated ? One side of its cathode is at plus 6.3 VDC and the other side of the cathode is at ground, or 0 VDC ???
At least, with AC, it is symmetrically moving about a zero point, across the entire length of the filament.
That is just one reason why we run AC filaments instead of DC filaments on DHTs. It is why designers select 2A3s and 45s, and these tubes are still being made, but not 6A3s and 6B4Gs.
Respectfully,
Jeff Medwin
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Follow Ups
- ... "bunk" ... so you think ??? - drlowmu 15:04:55 05/28/12 (3)
- DC Vs AC filaments aside ... - Naz 00:20:10 05/29/12 (0)
- RE: ... "bunk" ... so you think ??? - dave slagle 18:56:04 05/28/12 (1)
- RE: ... "bunk" ... so you think ??? - drlowmu 07:44:59 05/29/12 (0)