SET Asylum

RE: Full Monkey amps

24.128.56.196

Palustris

In Reply to: RE: Full Monkey amps posted by vhrynchuk on November 14, 2010 at 08:44:53

I like it!

Follow Ups:

RE: Full Monkey amps - danlaudionut 00:35:23 11/15/10 (5)
I have been playing around with
the 6J5/6EM7 in DRD for gain of 100
and an output impedance of 750.
Maybe use a Hammond 126B interstage.
and Magnquest EXO-010 plate choke.
Voltage swing of up to 200V capable.

DanL
- 6EM7 - Frihed89 01:13:50 11/15/10 (4)
  Interesting tube: One section is a preamp triode with Ra of 40K, 330 max plate volts, 66X amplification and a 1.5W max dissipation. The other section is a low-mu power triode, 10W max dissipation, Ra of 750 ohms, 330 max plate volts also, and 50mA max current.
  
  Are you using both sections (input-driver)?
  "What did the Romans ever do for us?"
  - RE: 6EM7 - danlaudionut 03:27:48 11/15/10 (3)
    Frihed
    
    The 6EM7 gain section does not
    lend itself to DRD or Full Monkey
    as it's Rp is too high.
    Above is a directly coupled circuit.
    For FM or DRD use a 6J5 as the gain tube
    and the 6EM7 power section as the driver.
    
    DanL
    - My take (on 6EW7) - gluca 10:26:45 11/15/10 (2)
      C1 is actaully smaller ... 4.7uF
      - RE: My take (on 6EW7) - danlaudionut 10:39:28 11/15/10 (1)
        
        In Reply to: RE: My take (on 6EW7) posted by gluca on November 15, 2010 at 10:26:45
        
        Gluca
        
        Looks good except for one thing.
        The B+ is way too low.
        The CCS can only swing about 25V.
        Make the B+ 350V and replace
        the CCS with the interstage
        and all will be well.
        Slightly higher ouput impedance
        and slightly less linear but nice.
        
        DanL
        
        RE: My take (on 6EW7) - gluca 11:34:19 11/15/10 (0)
        
        In Reply to: RE: My take (on 6EW7) posted by danlaudionut on November 15, 2010 at 10:39:28
        
        Actually I am running B+ at 380V and voltage swing is good for my headphones and as line driver. Yes, you need more headroom as driver stage. I must admit I was surprised by this small tube, damn good sounding tube!

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