5E3 "PaulC mod" question

Discussion in 'Shock Brother's DIY Amps' started by koen, Aug 26, 2010.

  1. koen

    koen Friend of Leo's

    Posts:
    4,027
    Joined:
    May 19, 2007
    Location:
    Home
    This weekend if I have some time, I'd like to try out the paulC mod in my 5E3. Based on this schematic, it only requires an additional 2.2M resistor. My local RatShack sells 1 M resistors, is it ok to just put two in series? The value will be a bit off, and ofcourse I need to pay attention regarding bare wires. I guess it's ok, but just in case I'd check here.

    I have built this amp myself, so I am aware of dangerous voltages inside an amp :p
     
  2. NorthPark

    NorthPark TDPRI Member

    Posts:
    30
    Joined:
    Oct 30, 2009
    Location:
    Phoenix
    well if you really want to get creative you can throw a pot in between the two 1m resistors

    usually 1m+1m is close enough
     
  3. Ronsonic

    Ronsonic Tele-Afflicted

    Posts:
    1,571
    Joined:
    Apr 14, 2010
    Location:
    Sunny Tampa, Florida
    The two Megs in series will work for most purposes. A bit ugly but it will work if you promise your amp you'll get the real thing in there. And preferably at least a 1/2W if not 1W.
     
  4. koen

    koen Friend of Leo's

    Posts:
    4,027
    Joined:
    May 19, 2007
    Location:
    Home
    I haven't had the time yet, so no report on how it works.

    Looking again at the schematics, I think it should be not too difficult to include a switch to go back and forward between the cathode bias and fixed bias. Has anyone done this?
     
  5. JCollins

    JCollins Tele-Holic

    Age:
    67
    Posts:
    978
    Joined:
    Mar 21, 2003
    Location:
    Pleasanton, CA
    What does this mod do?
     
  6. koen

    koen Friend of Leo's

    Posts:
    4,027
    Joined:
    May 19, 2007
    Location:
    Home
    It increases the headroom slightly.
     
IMPORTANT: Treat everyone here with respect, no matter how difficult!
No sex, drug, political, religion or hate discussion permitted here.