Tube DIY Asylum

RE: Here's one (two in cascode) loading a 6n6p

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In Reply to: RE: Here's one (two in cascode) loading a 6n6p posted by Tre' on June 20, 2016 at 14:12:31

Correct, putting a CCS at the tail could be a good idea (although some would disagree) as it will force operation into class A for the driver and make this amplification stage a 'series' P-P amplifier.

Here's a cascoded pair of DN2540 mosfets for use at either the plates or the tail.

Follow Ups:

RE: Here's one (two in cascode) loading a 6n6p - Michael Samra 17:01:50 06/20/16 (3)
V1 is a 6N6P? It looks like a pentode in that schematic.

"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
- The 6n6p was in my example. - Tre' 20:25:46 06/20/16 (2)
  .
  Have Fun and Enjoy the Music
  "Still Working the Problem"
  - RE: I dont think this will work for me - DAK 20:58:37 06/20/16 (1)
    The schematic i am following has plate to plate fb from the power tube to the driver. I am using a 100k resistor for that. I dont know if that will mess up the operation of this design.
    - RE: I dont think this will work for me - Tre' 21:02:36 06/20/16 (0)
      Can you post your schematic?
      
      Tre'
      Have Fun and Enjoy the Music
      "Still Working the Problem"
RE: Very Interesting, but... - DAK 16:58:39 06/20/16 (2)
No offense gents, I am looking for a tried implementation on a 6sn7 driver tube. I don't want to play with it as i am not all that comfortable using SS devices and invariably hook them up wrong. regards, Dak
- RE: Very Interesting, but... - Michael Samra 17:04:56 06/20/16 (1)
  Dak
  How are you going to implement each 6SN7? Are you to use one of the triodes as a voltage amp and the other as a driver for each tube? You have to make up for the voltage gain you are losing in the earlier stage but not having any.
  
  "For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
  - RE: Very Interesting, but... - DAK 17:24:25 06/20/16 (0)
    I am planning to use 1/2 of each 6sn7 for the driver so it will be a very simple 2 stage amplifier. I can also configure it with s 6sl7 driver tube.
    
    Edits: 06/20/16

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