Tubes Asylum

Can't ask the circuit designer..

108.200.223.64

Freo-1

In Reply to: RE: Measurements or it didn't happen... posted by Triode_Kingdom on August 14, 2023 at 14:21:02

Sadly, no longer with us.

Perhaps some of the answers are in the listed thread?
" Don't look back. Something may be gaining on you"

Satchel Paige

https://www.audioasylum.com/cgi/vt.mpl?f=tubes&m=227092&VT=T (Open in New Window)

Follow Ups:

RE: Can't ask the circuit designer.. - Triode_Kingdom 19:19:06 08/14/23 (5)
Hmmm, I was part of that discussion you linked. Sorry to hear about the designer. You can't post the two schematics?
- RE: Can't ask the circuit designer.. - sony6060 08:01:47 08/15/23 (4)
  6BL7 looks very linear to me to -20 volts bias. 12SN7 linearity craps out after -10 volts, but very good to -10 volts. Some 6SN7 tubes do not sound that good.
  - 6bl7 - Tre' 13:51:01 08/16/23 (0)
    How much idle current? At what angle is your load line?
    
    Tre'
    Have Fun and Enjoy the Music
    "Still Working the Problem"
  - RE: Can't ask the circuit designer.. - Tre' 13:42:14 08/16/23 (2)
    Assuming constant current (high load impedance, a horizontal load line) it looks pretty linear to me well beyond -10.
    
    It looks like a 16 volt peak to peak grid signal will drive the plate voltage 162 volt below idle and 162 volts above idle. You can't get any more linear than that.
    
    Sorry, I can't draw a straight line.
    
    Tre'
    Have Fun and Enjoy the Music
    "Still Working the Problem"
    - RE: Can't ask the circuit designer.. - sony6060 02:53:21 08/17/23 (1)
      Tre, on first plate curve what tube is it? No tube is shown on that plate curve like your second plate curve post.
      - RE: Can't ask the circuit designer.. - Tre' 12:24:19 08/18/23 (0)
        
        In Reply to: RE: Can't ask the circuit designer.. posted by sony6060 on August 17, 2023 at 02:53:21
        
        6sn7/12sn7
        
        Tre'
        Have Fun and Enjoy the Music
        "Still Working the Problem"

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