'65 BF Deluxe amp motorboating w/Vibrato onl any ideas?

[mike9]

I have a very clean '65 BF Deluxe Amp. Sounds very good, but motorboats in the vibrato channel - gets faster when you turn up the speed. Any ideas what I should check to run this problem down? any way of turning this channel into reverb?

[M Fowler]

Check for loose or broken caps near the photocell.

Mark

[Phil_S]

Motor boating or just ticking?
For ticking: http://www.timeelect.com/jbl-twin.htm see the second picture and description below it.
For motor boating, look for cold/cracked solder or bad filter cap. When was the last cap job on this amp? Maybe it's just overdue.