Hi Doug, I'd better start practising my vocals, hopefully no laughs my friends.
The Vibroverb was the first amp Fender made with built in reverb so I'm told. Mine is a Brea, CA 1991 re-issue from SF Guitar Center when it was still on Mission Street :
http://ampwares.com/amplifiers/767/
It has spring reverb and built in 'speed' and 'intensity' knobs in a light beige tweed face cloth with brown tolex, a typical Fender circuit ( 2 6L6GC, 12 AX7 and 12 AT7 ) though updated with solid state rectifier in place of the GZ-34 ( I think that's the designation ). I can get a nice 'Born On the Bayou' sound out of it, but I can't sing like John Fogerty, nor can I sing as well as Gene Clark. I sang some harmonies in my band back in the 70s when we played one of the many bars in Chico when I was a student there. We didn't even have monitors at that time. I could handle a 9 pm - 2 am gig back then, the pay was terrible, but we had fun. We didn't have monitors to hear ourselves sing, and most of the crowd were drunk, so it didn't really matter. We were paid a part of the $1 door and all the beer we could drink. Our last set was Gloria, Wild Thing, etc, because we were almost blind from beer at that time and most of the audience had left or passed out by the last set. 3 chords max

I was lucky to get $25, but it was soooo much fun, and I had much more stamina at 26 than I do now at 65.

I used a Deluxe Reverb back then with a second hand Les Paul standard that still smells of a grimy, smoky bar. No effects pedals other than blowing it to volume number 11

, and over-driving it. Served me well at the time, but man, stale cigarettes and beer ruined that amplifier. It was fun, and that's what counted. It would be years before I'd finally have a Rickenbacker guitar. I keep kicking myself because there were so many pre CBS Stratocasters for sale back then for less than $300..but I was a poor student and that was a huge sum in 1974 when I was living on a $380 per month G.I. Bill check. Chico was probably the only place you could manage on that paltry amount, I had to supplement my GI Bill with farm labor in the summers and semester breaks in the vineyards in and around Lodi, CA where I grew up ....sorry for the lengthy digression.

Everyone is welcome to use my amplifier if you choose to, looking forward to seeing you all again, and hopefully meeting new friends.
This :
http://ampwares.com/amplifiers/767/ is a great site for info on Fender amps from past to present for those of you who still play them.