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> New gu-84B (GU84B,4CX2500A) in box
New gu-84B (GU84B,4CX2500A) in box
GU-84B Svetlana tubes not production since 1993y.
But we offer the Brand New, really never used tubes from manufacturer old storage.
We offer a really New tubes with individual number passport !
Another sellers (Ukraine) offer regected old tubes from metal-scrap.
This Power electron tube was developed primary for navy and submarine transmitters uses. In transmitter "PLAMYA" ("FLAME"-engl.) it is used 10xGU-84B tubes. Probably after lost of any radio communications at Russian submarine K-19 has accident in 1962. These GU-84B tubes and Sockets remain are efficient even after impact of underwater nuclear explosion. But we hope that now it not actually,hi. It is applied also in civil big aircraft transmitters. On emergency mode GU-84B can work without cooling aproximately 20-30 minutes! Parameters of limited from sertificate of Svetlana Electron Devices can be double greater! Many contest stations get power more 4 KW in SSB and CW modes.
See below a 4kW 144MHz EME PA home-made in Japan. JA0BLU - Masato (westparknet.com).
All best 2-4kW PA use these GU-84B, GU-78B Transmitting Linear Tetrodes . Because these Russian Power Tetrodes is really the best on the World!
http:// /images/GU-84B/4004.jpg http:// /images/GU-84B/8002.jpg
"This 2500 watt plate dissipation tube has been constructed primarily for military communication, this tube is physically and electrically exceptionally rugged and with additional sophisticated protection circuitry incorporated in the DX-2, it is almost indestructible." http:// .au/amplifiers_dx2sp.php
Intermodulation distortion of the 3rd order -35 dB !(Eimac products to -32 db only)
All tubes from Eimac and other basic manufacturers are more powerful than 2kW have directly heated cathodes witch heater current 40-70A. It is an old and unreliable design. Offered GU-84B Svetlana tube is more modern, perfect and it is much more reliable. And it have estimated of the commercial PA manufacturers and also have estimated many HAMs. See links:
Also nice 50MHz 3kW PA on GU-84B. MADE IN JAPAN. Click to picture:
This sale of one GU-84B/4CX2500A (U.S. mark) Svetlana tube. Really New! The best for your Big Gun Amplifier!!!
