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66 BF Deluxe Reverb warbley

EGO_MACHINE

Member
Messages
199
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
 

LarryN

Member
Messages
955
Definitely worth a try, IMO. Make sure to get a 12AT7 with good voltage capability. KCA tube site is good reference.
 

pdf64

Member
Messages
7,634
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.
 

zenas

Member
Messages
8,859
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.
 

EGO_MACHINE

Member
Messages
199
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
 

LarryN

Member
Messages
955
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.
 

EGO_MACHINE

Member
Messages
199
excellent idea LarryN.

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

Dave
 

LarryN

Member
Messages
955
excellent idea LarryN.

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

Dave
Glad to help. Take into consideration it could be a cable as well. I've seen those braided cables give out.
 

EGO_MACHINE

Member
Messages
199
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?
 




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