Hello music lovers. I recently bought a Beard P50 tube amplifier. This amplifier requires 2 ECC82 (12AU7) and 2 ECC83 (12AX7) tubes. But I don't know in what order to put them correctly. 12AX7 are front and 12AU7 are closer to big tubes? Maybe someone has used this amplifier and knows?
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The “User manual” is not helpful, so we need a schematic. Unfortunately it appears that it is near impossible to find a schematic for this Beard P50. See: https://www.diyaudio.com/community/threads/beard-audio-p50-amplifier-ecc83-ecc82-kt88.366830/
It is hard to believe there are no markings for the tubes where a user could see it. It is probably your best bet to open up the amp and see if there are any markings on the PCB to identify which small double triode goes where. If that does not work I think you could trace out the circuit and draw your own schematic (the ECC83 tubes will have much higher load resistors, likely 120k +, while the ECC82 will probably have 20-60k). It is likely that the ECC83 is closest in the circuit to the input, and ECC82 is used for driving the power tubes.
Hope this helps.
It is hard to believe there are no markings for the tubes where a user could see it. It is probably your best bet to open up the amp and see if there are any markings on the PCB to identify which small double triode goes where. If that does not work I think you could trace out the circuit and draw your own schematic (the ECC83 tubes will have much higher load resistors, likely 120k +, while the ECC82 will probably have 20-60k). It is likely that the ECC83 is closest in the circuit to the input, and ECC82 is used for driving the power tubes.
Hope this helps.
