This amp has great specs, produces twice the power from your favorite tube and is simple to build. But you will need to decide which power transformer to use, both have identical performance but one runs cooler than the other because of the laminations. Then select which output transformer you’d like, our standard copper wound or the new PSSS which gives silver performance at a fraction of solid silver price. Read Jack’s comments at www.electra-print.com->Tech Blog->Spring 2007->Class A2 Operation for a description of this new transformer. You can find a list of the Electra Print transformers needed to build this amp below the schematics.

• 50 watts output
• .15% THD
• -1db 15hZ 40 kHz
• .7v to full output

 

 

Transformer prices:
Part                                     Price   Notes
PPA2 Power M19 lamination  $205  Standard Lainations
PPA2 Power M6 lamination    $256  Cool operation
PPA2 Output                         $245  Standard copper
PPA2 Output PSSS               $514  Partial Silver Stranded Secondary
A2LD-7 Interstage                  $  95  Constant load driver
High Voltage Choke               $  34
Filament Choke                     $  24