45 watt Pro Reverb w/ MV Schematic

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10-15-2022, 11:51 AM
scrubba

45 watt Pro Reverb w/ MV Schematic

Does anyone have info on a schematic for a 1977 Pro Reverb? My particular amp is rated at 45 watts, and has the push-pull master volume. The closest schematics I've been able to find are the AA 1009/1069 and the AA 270, but none of them are the exact circuits.
10-15-2022, 12:41 PM
Michael Smith

Re: 45 watt Pro Reverb w/ MV Schematic

I couldn't find any schematics for the Pro Reverb with a master volume. Is your amp diode rectified or tube rectified? If diode, it may be the ultralinear version. I did find a schematic for that one with the push pull master volume at thetubestore.com.
10-15-2022, 01:08 PM
scrubba

Re: 45 watt Pro Reverb w/ MV Schematic

Quote:

Originally Posted by Michael Smith

I couldn't find any schematics for the Pro Reverb with a master volume. Is your amp diode rectified or tube rectified? If diode, it may be the ultralinear version. I did find a schematic for that one with the push pull master volume at thetubestore.com.

Thanks for your reply. My amp is tube rectified (5U4GB). I'm not positive, but I believe the Ultralinear versions were 70 watts. My amp is 45 watts, as indicated on the rear plate, which is kind of an anomaly, as most Pro Reverbs were either 40 watts or in later years, 70 watts. Anyway, thanks for your input.
10-15-2022, 01:18 PM
Michael Smith

Re: 45 watt Pro Reverb w/ MV Schematic

Ya, the ultralinear was 70Watts. I think I may have found the schematic for your 45 watt amp. Same circuit used on the Pro Reverb, Bandmaster Reverb and Super Reverb.
https://www.thetubestore.com/lib/the...-Schematic.pdf
10-15-2022, 01:31 PM
phantomman

Re: 45 watt Pro Reverb w/ MV Schematic

Quote:

Originally Posted by scrubba

Thanks for your reply. My amp is tube rectified (5U4GB). I'm not positive, but I believe the Ultralinear versions were 70 watts. My amp is 45 watts, as indicated on the rear plate, which is kind of an anomaly, as most Pro Reverbs were either 40 watts or in later years, 70 watts. Anyway, thanks for your input.

Does your amp's vibrato channel have a "middle" tone control?
10-15-2022, 01:46 PM
scrubba

Re: 45 watt Pro Reverb w/ MV Schematic

Quote:

Originally Posted by Michael Smith

Ya, the ultralinear was 70Watts. I think I may have found the schematic for your 45 watt amp. Same circuit used on the Pro Reverb, Bandmaster Reverb and Super Reverb.
https://www.thetubestore.com/lib/the...-Schematic.pdf

You da man! Looks like what I've been searching for. Thank you so much for your help. Have a great day, you've made mine.
10-15-2022, 01:56 PM
Michael Smith

Re: 45 watt Pro Reverb w/ MV Schematic

Glad to help! That amp has a tube balance pot, not a bias pot. It can be converted to a bias pot, or a second pot added for adjusting bias. I think Uncle Doug has a video on that.