Saturday, July 12, 2014

6AS5 and 6N2P vacuum tube base guitar amplifier

This is our first vacuum tube base amplifier project and this project is based on 6AS5 pentode and 6N2P dual triode. Schematic of this project is not designed by us and we got it from web. We got this schematic sometimes ago and now we can't find original site where this schematic appeared first, because of that we host copy of that schematic in here.

Prototype version of 6AS5 and 6N2P guitar amplifier

In original schematic, initial stage of the amplifier is based on 12AX7 high gain tube. During the construction we can't find 12AX7 in local market and because of that we replace 12AX7 with 6N2P. Both 12AX7 and 6N2P had identical characteristics and only major difference is heater configuration. After replacing 12AX7 with 6N2P, both the tubes can drive through single 6.3V filament supply.

6N2P tubes are now commonly available and we use Russian version of 6N2P (6Н2П) for our testing.

We test this amplifier with 4K audio output transformer and it produces excellent results. This amplifier is not suitable for use as Hi-Fi audio amplifier.