Beard P101

[AMR]

Hello. I have a Beard P101 power amplifier. Does anyone know the correct valve order of the preamp?. It uses e82cc, e81cc and e83cc, but I don't know the position of each one. I don't have the schema or service manual.

Thank you

 

[rayma]

I have a Beard P101 power amplifier. Does anyone know the correct valve order of
the preamp?. It uses e82cc, e81cc and e83cc.

The higher gain tubes go earlier in the circuit. First the ECC83, then the ECC81, and last the CF driver ECC82.
Here's a schematic. http://lilienthalengineering.com/wp-content/uploads/Beard-P100-KT88-PP-ed.png

 

[AMR]

Thank you!!

 

[rayma]

Thank you!!

Good luck, how much work does it need? Be sure to balance the DC on the first stage with the pot.

 

[AMR]

It doesn't need too much work. It has a board to switch from half power to full power mode (see attached image) that doesn't seem original. It has a loose wire and it only works well on full power mode.

 

[rayma]

It doesn't need too much work. It has a board to switch from half power to full power mode
that doesn't seem original. It has a loose wire and it only works well on full power mode.

Get rid of that crude op amp junk and restore the amp to the original schematic.

 

[AMR]

Yes, that is what I have in mind. The problem is to know how the original wires was wired. The power section is different from P100..

 

[AMR]

I already have the documentation. Anyone interested, please send me a PM.

Thank you.

 

[Complin]

Does anyone know how easy it would be to change a 101 set for 220v to an original UK of say 240v. Is it just resetting some taps or more complex than that?