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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Apostasy follows posted by Lee of Omaha on September 11, 2015 at 08:45:31:
And I wouldn't use a VR anyway. Not even in a SET. Anywhere, chokes are more important, as is storage.No, not even when the VR features above the chassis? Good place fro another nice BIG PSU cap, IMO.
VR's just do limit storage and thus limit what we can achieve in low-ripple and slam terms. And, they wear out. Not a good thing in a PSU.
Mind you, this all came about when I was doing a rethink/rebuild of two LEAK St20s right when GZ34 VRs were either rapid-failure shite or $$$$$$ NoS / used.
Put me off VRs - permanently.
And then, ta da! - we had that unused 5Volt filament winding - to go DC 6.3V with for the 6DJ8 input tube that replaced the 12AX7. Plenty of 6.3V filament current reserve - so could run 6CG7s and a FET CCS for LTP splitters, bye bye to two more 12AX7s on each amp. Out went all three 12AX7s.
Not apostasy, just common sense.
Add a thermistor to the primary into the PT and perhaps another one on the B+/HT secondary and you've got all the slow turn-on you'll need.
Reliable too.
Warmest
Tim Bailey
Skeptical Measurer & Audio Scrounger
Edits: 09/22/15 09/22/15 09/22/15
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Follow Ups
- I agree, any audible difference will be due to differing volatge drops. - Timbo in Oz 21:08:05 09/19/15 (0)
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