The first electronic amplification of sound was done with Vacuum Tubes. We have pre-amp, power and rectifier vacuum tubes among other types in New Old Stock from the golden era of American & European manufacturing as well as current production tubes from today.
PeaveyHartley Peavey founded Peavey Electronics, one of the world's largest manufacturers and suppliers of musical and professional audio equipment, in 1965, having built his first amplifier in 1957.
RubyRuby tubes are manufactured in China and tested for quality and performance.
Vacuum Tube - 12AU7, China
9 pin miniature preamp tube (Amplification Factor = 17)
Vacuum Tube - 12AT7, China
Chinese 12AT7 dual triode.
Vacuum Tube - 12AX7, Peavey
Peavey 'Super 7' 12AX7
Vacuum Tube - 12AX7B, China
9 pin miniature preamp tube (Amplification Factor = 100). The Chinese 12AX7B is very similar in tone to its standard Chinese cousin, but the Bs seem to average in at slightly lower gain and noise.