SET Asylum

+ plate impedance is cut.in half (Jeff.SHOULD like that ... Decreased resistance, - tube not utilized for max

107.77.104.83

Cleantimestream

In Reply to: RE: Using both section of a dual triode for the driver tube posted by DAK on December 08, 2016 at 08:38:59

Functionality.
The Mind has No Firewall~ U.S. Army War College.

Follow Ups:

Nope ! Not allowed. Find the right tube, with correct mu and low plate resistance. (nt) - drlowmu 12:03:51 12/13/16 (2)
Seek and ye shall find. Knock, and it will be opened unto you. Solder, and ye shall breathe-in toxic fumes.

Low Mu
- Nope ! Not allowed. Find the right tube, with correct mu and low plate resistance. (nt) - Cleantimestream 19:03:43 12/13/16 (1)
  Gee, Jeff, had you read my response to DAK, your retort would have been unnecessary, the 417A, 437A, are in a class by themselves and they have no peer so far as what you are trying to convey. I never considered tying the plates together to lower plate resistance, use another tube is what I said to DAK... You should too, if you are building amplifiers, 12AX7?
  
  Excellent in a preamp position, but it's resolution/clarity in an amplifier compared to say, 417A is pathetic. Too bad you refuse to recognize opinion when you see it. Try building new schemos.
  
  nothing changes if nothing changes.
  
  Although the room trumps any other factor.
  
  The Mind has No Firewall~ U.S. Army War College.
  - RE: Nope ! Not allowed. Find the right tube, with correct mu and low plate resistance. (nt) - drlowmu 08:37:56 12/14/16 (0)
    Thanks, You ( and most others ) still assume I use half a 12AX7, as I did in the past. FYI, this can be done, and to a stellar effect, but the amp has to be engineered for the whimpy drive, in many areas. Conventionally trained engineers haven't the imagination to do this, and IT has to be perfect. Dennis Fraker has successfully done this, since 1989. No SET amp I know of, or YOU have ever heard, beats Dennis' implementations, or even comes close. Believe me !! He knows how to get what he wants, better than anyone I have seen or know of. Hands down.
    Good news, I changed this in November 2016. Just as you have kindly suggested I do. Absolutely love the result. Thanks,
    Jeff
    
    Edits: 12/14/16
wouldn't that be good for a 6su7? - DAK 09:11:23 12/11/16 (1)
Keep the mu but half the impedance.
- RE: wouldn't that be good for a 6su7? - Cleantimestream 14:35:39 12/11/16 (0)
  Yes Sir, I use 6SU7's in a Baldwin circuit that.employs what I deem ingenious regulation ... Only drawback is one cannot Triode wire because of it. If my goal was lower plate impedance, then choose another tube ... One of finest amps I have built uses 417a with LED bias. Dead quiet using 816 rectification
  
  Dead quiet through modified Khorns.
  
  The Mind has No Firewall~ U.S. Army War College.

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