Quote:
Originally Posted by lacad01
Hmm, could go by a few names: power tube, power valve, vacuum tube aka from a tube amplifier  |
Quote:
Originally Posted by bartman
Vacuum tube resistor....the one in old radios....
you pipped me I think Adam
Bartman
|
Correct and correct. This is a 1:1 shot of the top section a Chinese made Shuguang 845B valve - a rather good copy of the RCA made 845 units. These are known as triodes (3 main parts - anode, cathode and grid), as opposed to the simple diodes, and more complex pentodes, tetrodes, etc. The 845 is one of the most famous of the triodes, and enjoys much respect from the audio community. Other triodes of notoriety are the 211 (very similar in many ways to the 845), and the 300B.
These valves aren't cheap but aren't expensive either, around $300/pair. They usually last around 10k hours. These are a part of my newish amps - Cyber Opera Consonance 845 SETs (single ended triodes) - they run in single ended mode rather than parallel (which effectively splits the signal and rejoins it, not good imho), pure Class A. Lowish power, but a wonderful sound nevertheless. Here's a few shots of the amp:
http://farm5.static.flickr.com/4136/...c49738027d.jpg
Front of the amp:
http://farm5.static.flickr.com/4139/...5f7622c83f.jpg
Sides of the amp:
http://farm5.static.flickr.com/4081/...297af442c5.jpg
valve mounting section (from the top):
http://farm5.static.flickr.com/4116/...d161014f41.jpg
these are monoblocs, so there's Two of them.
Dave