The RF Parts 3-500ZG™ is a compact power triode intended to be used as a zero-bias Class AB2 amplifier in audio or radio-frequency applications. Operation with zero grid bias simplifiers assocated circuitry by eliminating the bias supply.

The 3-500Z tube stands as one of the most versatile and powerful transmitting tubes in the amateur radio and industrial sectors. This robust triode tube combines exceptional durability with high-power handling capabilities, making it a preferred choice for both HAM radio enthusiasts and professional applications.

Time Owned: 0 to 3 months. Excellent packing with foam and peanuts, fast shipping. Placed matched pair of 3-500ZG's in my SB-220, and they worked better than the original Eimac tubes. 40 watts carrier drive in - 400 watts out. DC power in vs power out for 72% efficiency in the amp. Great purchase and would buy again. 73, K4LJF

The Penta Laboratories PL3-500ZG is a high-mu power triode with a maximum plate dissipation rating of 500 watts. Cooling is by radiation and forced air through the base, along the envelope, and over the plate seal and radiator-type plate connector. It is intended for use as a zero-bias Class AB amplifi er in radio-frequency.

New Thomson CSF 3-500ZG transmitting Valves. Direct replacement for 3-500Z with higher anode dissipation. As fitted to many popular Linear Amplifiers such as Linear Amp UK, Trio/Kenwood TL922, Ten-Tec, Drake, Heathkit etc. 6 month warranty

Tube 3-500Z or Röhre 3-500Z ID6384, Transmitting Triode, air cooled, SPECIAL TUBEBASE in general and Power/Output shown. Radio tubes are valves.

Get the best deals for 3-500zg at eBay.com. We have a great online selection at the lowest prices with Fast & Free shipping on many items!

Penta Labs matched vacuum tubes go through rigorous test procedures to enhance performance during their operation. Each Penta Labs vacuum tube is burned in for a minimum of 48 hours dissipating full power with filament, plate and screen voltages that …