|
| News | Electronics Museum | Articles | Video | About | Store | RSS | Contact |
| Counting Tubes |
| View cart |
| Haydu 6700 | |||||||||
 |
The 6700 is the first production beam switching tube, developed by Burroughs and initially manufactured by Haydu as a high speed counter for use in computers. All subsequent beam switching tubes developed by Burroughs are direct descendants of the 6700. This tube is used, but the original Haydu label is still intact.
|
||||||||
| Raytheon 7978 | |||||||||
 |
Though Raytheon manufactured many second-source variants of Sylvania dekatrons like the 6802 and 6910, Raytheon developed few new dekatron part numbers themselves. The hard-to-find 7978 is an example, one of only two part numbers manufactured exclusively by Raytheon. With the exception of its pedigree, the 7978 is otherwise a fairly standard neon-filled compact dekatron. It operates in a conventional double pulse fashion and counts at 5kHz. The tube's electrical characteristics are very similar to a Sylvania 8353, though its envelope and pinouts are different. The tube is substantially rarer than an 8353 however, and heavily sought by collectors seeking an example of a Raytheon-designed dekatron.
|
||||||||
| Van Norman CP-468/U Beam Switching Counter | |||||||||
 |
Van Norman Industries CP-468/U counting module, used with minor wear. This is a rare magnetic beam switching tube counter, with a large Burroughs BD-301 ten position counting tube installed prominently in the center of the device. The device also has two unpopulated 9 pin tube sockets, both marked for 5814A tubes. This module is rated for a maximum counting speed of 100khz and has a front mounted 12 pin edge connector for attachment of an external Nixie tube display.
|
||||||||
| Western Electric 6167 | |||||||||
 |
The 6167 is a very unusual counting tube. Instead of having pins or bent cathodes like most other dekatrons, the 6167 uses tiny springs for its cathodes. Each spring has a small finger, which exits the top of the spring and hangs over the center of the adjacent cathode. It requires less maintaining voltage to hold a glow discharge within a tube-shaped cathode than upon the surface of rod-shaped cathode, and the 6167 is designed to take full advantage of this phenomenon. During operation the glow will rest in the center of each spring, jumping to the finger only during glow transfer. Units are new old stock, white boxed. Buyers should be advised that the 6167 is a challenging tube to get operational, the readily available 'spinner' circuits on the Internet will not work with this tube.
|
||||||||
| Raytheon CK6802 | ||||||||
 |
The 6802 is Sylvania's original octal-base counter, designed to compete with ETL's GC10B. The 6802 is a 'computing' counter with multiple output cathodes, and has a 4kHz maximum counting speed. This example is a somewhat more uncommon Raytheon second-source variant, the CK6802. Tube tests good.
|
|||||||
| ©2000-2010 The Vintage Technology Association. All rights reserved. |