Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: scstill on December 27, 2020, 09:41:56 am

Title: Supro 6497 Circuit/Schematic
Post by: scstill on December 27, 2020, 09:41:56 am

I am having trouble finding the schematic for the Supro 6497 (seems rare). Anyone advice where to get?
2 channel with bass/treble switch on channel one and Guitar/accordian switch on channel 2
Also not sure if it uses 5y3 or 5u4 as rectifier as Supro used both.
Has a foot switched tremelo circuit and is a split amp with the PS in the floor and preamp in the top.
Seems to be same cabinet and 15" Jensen ceramic as the 6420 (which is more common)
Any knowledge would be appreciated

Title: Re: Supro 6497 Circuit/Schematic
Post by: Apexelectric on December 29, 2020, 09:19:41 pm

What tubes are in it? Supro usually had the designations printed in the chassis.  Might be the same as other designs with a different speaker configuration.

Title: Re: Supro 6497 Circuit/Schematic
Post by: scstill on December 31, 2020, 04:29:40 pm

Quote from: Apexelectric on December 29, 2020, 09:19:41 pm

What tubes are in it? Supro usually had the designations printed in the chassis.  Might be the same as other designs with a different speaker configuration.

Power two 6L6
Pre 12ax7
PI 12ax7
Trem 12ax7
Rect 5au4

Yes it will look a lot like other sections of Supro Schematics. I'll cobble something together and share it here for comment. Thanks

I think the 6497 schematic is Supro's version of Unicorn :-)