From:
         
         Lee   (lmholbrook@utahlinx.com)
   Date:
            7/20/2000 6:48 PM
 Subject:
         Save Me Fender Guys!



I just found a problem in my '65 BFSR. There is a ticking that will not go
away. I assume this is the dreaded "vibrato-ticking-syndrome". How do I fix
this? I use this amp and a '66 in stereo from time-to-time. Both of these amps
have amazing tone, but my '66 is just marvelously dead-ass quiet, so this
really bothers me when I run them together.

All help is grealy appreciated!

Lee 

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   From:
         
        Danny   (DMichel123@yahoo.com)
   Date:
            7/20/2000 9:51 PM
 Subject:
        Re: Save Me Fender Guys!



there is a very simple mod where you just add a cap somewhere, don't ask
me where, but if you want to do a little more, convert it to bias modulating
style tremelo, i did it to my BF Bandmaster it sounds amazing 

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   From:
         
        Carlo   (Funkyloon@aol.com)
   Date:
            7/21/2000 4:35 AM
 Subject:
        Re: Save Me Fender Guys!



Here's a post from Tim C. on the subject.

     Tim C. Badge051@aol.com 
     Date: 6/27/2000 2:21 AM 
     Subject: Re: ticking thumping tremelo HELP! 
     Gary, 
     The following is from Fender Tech Notes dated June 1998. 
     "Some years ago service bulletin #9 was issued on the cure
     to ticking in the vibrato of older Fender amps. We still get
     calls on this so lets review the solution here: 
     The vibrato consists of a photo-cell and a neon lamp held
     together by a piece of 0.025 heat shrinkable black tubing.
     One side of the photo-cell or LDR goes to a control
     potentiometer and the other side goes to ground. One side
     of the NE-2 neon lamp goes to a 100K ohm resistor and the
     other side goes to a 10 meg ohm resistor. (also tied to the
     plate of the 12AX7 vibrato tube). 
     The solution calls for adding one capacitor and dressing the
     leads: 
     Connect a 0.01 mf 600 volt mylar capacitor from the
     junction of the 10 megohm resistor (where it connects to
     the neon lamp on the eyelet board) to ground (where the
     LDR connects to ground also on the eyelet board). 
     Dress the leads to the vibrato speed and intensity controls
     away from the tone controls and filter leads. Bunch
     together the leads connecting the components on the eyelet
     board to the tube socket of the 12AX7 vibrato tube. 
     Incidentally, the vibrato oscillator is a phase shift type
     oscillator that uses three capacitors between the plate and
     control grid of the first triode to shift the phase
     approximately 60 degrees each or 180 degrees in all to
     provide regenerative feedback for sustaining oscillation.
     These capacitors (usually one .02 mf and two .01 mf) have
     a higher incidence of failure than most of the other
     components in the vibrato circuit (outside of the tube). They
     should be checked or replaced right away if the circuit is
     not oscillating." 
     Good Luck,
     Tim C. 

hth,
Carlo