This listing features a tested&matched  1962 rare Telefunken tubes, model 12AX7/ECC83/CV4004/5751, made in Germany. These vintage tubes have a ribbed plate design and come with test numbers for quality assurance. Perfect for use in vintage audio and video equipment, these tubes are a great addition to any collection. The brand, Telefunken, is well-known for producing high-quality audio equipment, and these tubes are no exception. Don't miss out on the opportunity to add these vintage gems to your collection!

AVO VCM 163 RESULTS (factory)

Ia=1.2mA

gm=1.6mA/V