6C33C-B For Sale
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The 6C33C-B is the ultimate power triode. Originally designed as a voltage regulator for the avionics in Russian military aircraft, it is the ideal high current triode for applications such as transformerless (OTL) power amplifiers and power supplies. A few years ago I was offered a deal on a large quantity of them, and I had various projects in mind so I bought them. Since then the projects have faded away but my several hundred 6C33C-Bs most certainly haven't. I'd really like to get back the space in my garage, so I'm offering them at a good price. They are new in the original very substantial Russian packaging, and are dated 1992.
6C33C-B Characteristics
Filament Voltage
6.3V
Filament Current
6.6A
Maximum Plate Power Dissipation
90W
Maximum Continuous Plate Current
560 mA
Mutual Conductance
40 mA/V
Voltage Gain (µ)
3.2
Plate Resistance
80 Ω
Base Special 7-pin
Size 125mm (5") high
65mm (2.5") diameter
Prices
$25 each for 6 or more, including shipping within the US. Outside the US, $18 each plus shipping at cost. For 5 or less, $30 each.
I can also sell you a carton of 50 for $700, including ground shipping within the continental US. At this price they are "as is" - I will replace any which are physically broken but not out of spec or dead tubes (they're a bargain anyway). Reports suggest you can expect 10-20% to be significantly out of spec.
I'm not a dealer, so I can't offer services like matching or testing. If you get tubes which are non-functional, I will of course replace them (at the $25 price, not in cartons of 50).
Send me an email if you're interested, indicating how many you'd like. Payment by PayPal or check (US or UK) - no credit cards I'm afraid (although you can use PayPal to pay with a card).
Interesting Links - circuits and so on
Lots of amplifier circuits using the 6C33C-B
More tube data (Duncan's)
More data (Audiomatica)
Suitable sockets for sale ($5.95 each)
The Atma-Sphere Novacron OTL amplifier using the 6C33C - sadly no longer in production
