The reverb amps will start to break up around 4-5 on the volume knob while the non-reverb amps stay clean to approx 6-7. All these ab763 amps with reverb has the gain stage in the reverb recovery circuit which the non-reverb amps don’t have. Yes of course some have the mid knob and bright switch while others don’t. The main differences between these amps are transformer size, filter caps size and output/speaker impedance.
#1966 fender bandmaster pro
The silverface Bandmaster Reverb is a typical ab763 amp and shares basic circuit design with the Super Reverb, Deluxe Reverb, Twin Reverb, Vibrolux Reverb, Pro Reverb and Twin Reverb.
It reminds us more of a classic 80w Twin Reverb than a Bandmaster Reverb, and it shared its circuit design with the Pro Reverb and Super Reverb at that time. The 70W model from 1978 with master volume and push/pull boost had a huge power transformer and big filter caps. As usual the later silverface models were modified to become cleaner and more powerful. Due to this the silverface Bandmaster Reverb is less powerful, has less attack and breaks up earlier than the blackface Bandmaster. The silverface Bandmaster amps got a 5U4GB tube rectifier and the vibrato channel got reverb. The blackface head had a diode recifier, one normal channel and a vibrato channel with no reverb. The Bandmaster came with many different circuits during the blackface and silverface eras.
V4 12ax7 = 1/2 Reverb recovery and 1/2 gain stage for vibrato channel.1988 -1980 silverface Bandmaster Reverb Master volum 45w and 70wĪA763/AB763 Blackface Bandmaster (Seen from behind, V1 is to the right side):.1963 -1967 blackface Bandmaster circuits AB763.Bad monkey- you made my day brother thanks! Sorry to ramble on and get kinda off the subject. Sooooooooooo glad I decided to jump in and ask a question- I couldn't imagine a more perfect outcome. For free!!! Wtf! This forum is freakin awesome. But more people added their knowledge, I found out it wasn't defective, AND BEST OF ALL, a member was so cool that he is sending me the exact pedal I need.
I was pretty disappointed to say the least. So glad I did! But when the thread started, people thought based on what I was describing, my vibrato was bunk. Yesterday I found a reasonable deal on the DRRI and decided it was time to make it happen. I just didn't want to, or flat out couldn't, pay for it. I've always wanted to get the blackface '65 deluxe reverb reissue. I have a few amps that are pretty decent- but I got them cause the price was low. He said hold out and save to pay a little more than you want to and get THE ONE you really want. But some great advice I got from a member a few weeks ago was: stop constantly buying and selling amps just cause there relatively inexpensive and close to what you REALLY want because you never end up satisfied. I have been reading this forum for months without posting and getting the amp I've wanted for so long lead my to start my first thread. Bad monkey is sending the pedal I need for free! There's so many good people on here. Hey everyone- I posted yesterday about the vibrato/footswitch problem with the 65 DRRI I just bought yesterday.
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