66 BF Deluxe Reverb warbley

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by EGO_MACHINE, Feb 4, 2012.

  1. EGO_MACHINE

    EGO_MACHINE Member

    Messages:
    199
    Joined:
    Feb 19, 2008
    Location:
    Eugene oregon
    Hello,

    The reverb in my 66 BF Deluxe is very werbly in nature...a very tight oscillation sort of tone in its decay. At higher levels the reverb is prone to feedback. It's not very smooth. The dry tone of the amp is fantastic. I also own a 66 Pro Reverb... for comparison.

    Could this be a 12at7 issue?

    Dave
     
  2. LarryN

    LarryN Member

    Messages:
    959
    Joined:
    Jan 1, 2004
    Location:
    Santa Rosa, Ca.
    Definitely worth a try, IMO. Make sure to get a 12AT7 with good voltage capability. KCA tube site is good reference.
     
  3. pdf64

    pdf64 Member

    Messages:
    5,194
    Joined:
    Aug 9, 2008
    Location:
    Staffordshire, UK.
    More likely to be the tank. A replacement is cheaper than a tube, and a 3 spring type would give lusher reverb.
    Have you checked the tank? A suspension spring may be broken etc.
    If you unplug the tank, do high reverb setting still result in feedback - if so V4 cathode bypass has likely failed.
    Pete.
     
  4. zenas

    zenas Member

    Messages:
    6,091
    Joined:
    Jul 1, 2011
    Has the amp been serviced? Meaning recapped. Filter caps, bias board cap and the 25uf 25v ones on the board.
    If not that's the first thing I'd do. Also there could be bad solder joints and grounds.
     
  5. EGO_MACHINE

    EGO_MACHINE Member

    Messages:
    199
    Joined:
    Feb 19, 2008
    Location:
    Eugene oregon
    Hello Friends,

    Yes has been recapped, 3prong extra... Set up for gigging. Sounds amazing dry.... the amp blooms clear up to full volume....with Natural OD Eddie would be happy with... I will look at the pan. I will pull the 12at7 from my 66 Pro Reverb and see if that works.... it does sound like a bad pan to me though....

    Pete I will test as you directed.

    Dave
     
  6. LarryN

    LarryN Member

    Messages:
    959
    Joined:
    Jan 1, 2004
    Location:
    Santa Rosa, Ca.
    Connect the tank from the Pro Reverb if it's not the tube. If it ends up being a tank, the 3-spring sounds pretty different than the 2-spring. You may or may not like it. The decay is different. I went back to 2-spring to get the old Fender amp style I was used to. No harm trying it out if you don't mind experimenting.
     
  7. EGO_MACHINE

    EGO_MACHINE Member

    Messages:
    199
    Joined:
    Feb 19, 2008
    Location:
    Eugene oregon
    excellent idea LarryN.

    I'm in the middle of the Honey-do list.. So will try suggestions this evening and report back outcomes.

    Dave
     
  8. LarryN

    LarryN Member

    Messages:
    959
    Joined:
    Jan 1, 2004
    Location:
    Santa Rosa, Ca.
    Glad to help. Take into consideration it could be a cable as well. I've seen those braided cables give out.
     
  9. EGO_MACHINE

    EGO_MACHINE Member

    Messages:
    199
    Joined:
    Feb 19, 2008
    Location:
    Eugene oregon
    Hello Friends,

    Sorry for the delay in response. So it must be the pan in the 66 Deluxe as when plugging the Deluxe through the 66 Pro Reverb pan it sounds perfect.

    Which Pan do you all suggest? Two or three spring? Would a three spring get me into Toneking Reverb territory?
     
  10. phsyconoodler

    phsyconoodler Member

    Messages:
    4,351
    Joined:
    Jul 11, 2005
    Location:
    calgary canada
    without a dwell control the three spring tank will be surf city all the time.Too much dwell.
     
  11. slider313

    slider313 Silver Supporting Member

    Messages:
    7,484
    Joined:
    Jul 28, 2005
    Location:
    NC
    True......but not so much so if you use a 7247/12DW7 as your reverb recovery tube.
     

Share This Page