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Mesh plates in rectifiers.

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Posted on March 15, 2008 at 13:32:25
Analogtheo
Audiophile

Posts: 179
Location: Copenhagen
Joined: April 26, 2004

Hi

Many early European rectifiers used mesh plates, which was later abandoned for solid plates.
Do any of you know why they used mesh plates, and why the went to solid plates?
I would appreciate if this could be a technical discussion, and not about the audible aspects.

Theo

 

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RE: Mesh plates in rectifiers., posted on March 15, 2008 at 14:39:57
GEO
Audiophile

Posts: 4749
Joined: April 7, 2000
Contributor
  Since: September 9, 2000
 Generally in lower power apps and in many cases you need two.....

 

RE: Mesh plates in rectifiers., posted on March 15, 2008 at 20:47:30
unclestu52
Dealer

Posts: 6982
Location: Hawaii
Joined: March 5, 2005
 I've never seen any explanation for mesh plates. Since the purpose of the plate structure is to gather electrons from the cathode in the center, one would expect a solid plate to be much more efficient. It possibly could be that earlier tubes perhaps did not have the requisite metallurgy to have a solid plate structure to absorb the heat that the electron bombardment the cathode is capable of. Indeed many of the advances of later power tubes seem to emphasis the advanced technological structures of the plate construction (eg trilaminate construction for the 6550A's etc.).

IT would be nice to have someone more knowledgeable respond and illuminate us.


Stu

 

RE: Mesh plates in rectifiers., posted on March 16, 2008 at 19:47:26
GTCharlie
Audiophile

Posts: 983
Location: Philippines
Joined: December 9, 2004
 Have often wondered... solid (thick and massive) plate should be able to dissipate more heat. Damper diodes, for instance, can withstand up to 3 amperes of bombardment. And they're solid. Mesh would have less material. We're looking into physics here, I suspect.

 

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