The AM Forum
April 29, 2024, 09:18:02 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: 1 [2]   Go Down
« previous next »
  Print  
Author Topic: True Story?  (Read 9664 times)
0 Members and 1 Guest are viewing this topic.
kb3ouk
Member

Offline Offline

Posts: 1640

The Voice of Fulton County
« Reply #25 on: April 14, 2013, 10:20:55 PM »
I tried to find it and can't, but I'm pretty sure I saw brand new ones for sale somewhere, of course they were Chinese made, but it was interesting to see an early high power tube design like that still being in use.
Logged
Clarke's Second Law: The only way of discovering the limits of the possible is by venturing a little past them into the impossible
Opcom
Patrick J. / KD5OEI
Contributing
Member
*
Offline Offline

Posts: 8315



WWW
« Reply #26 on: April 16, 2013, 01:47:11 AM »
How were the old radiators attached to the cylindrical plate? soldered on?

Logged
Radio Candelstein - Flagship Station of the NRK Radio Network.
W7TFO
WTF-OVER in 7 land Dennis
Contributing
Member
*
Offline Offline

Posts: 2525


IN A TRIODE NO ONE CAN HEAR YOUR SCREEN


WWW
« Reply #27 on: April 16, 2013, 03:15:56 AM »
Quote from: Opcom on April 16, 2013, 01:47:11 AM
How were the old radiators attached to the cylindrical plate? soldered on?

Yep, usually with silver solder.  Right to the same copper plate that would otherwise sit in a water jacket.  The fins were about 1/8" thick, enough of them to make up to forty pounds of copper.

The air-cooled tubes had a massive, thick porcelain chimney to direct the flow.

Air wasn't as messy as the water system, but the payoff came in runtime hours:  Average 8,000 for air, 40,000 for water-cooled.

73DG
Logged
Just pacing the Farady cage...
kb3ouk
Member

Offline Offline

Posts: 1640

The Voice of Fulton County
« Reply #28 on: April 16, 2013, 08:37:37 AM »
There's a book around here somewhere that shows the air cooled tubes like that in a 50 kw Westinghouse transmitter, if I remember right this thing has 4 of them, one pair would run then if they failed, the other ones could be switched in.
Logged
Clarke's Second Law: The only way of discovering the limits of the possible is by venturing a little past them into the impossible
Pages: 1 [2]   Go Up
  Print  
The AM Forum  > THE AM BULLETIN BOARD > QSO > Topic: True Story?
 « previous next »
 
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone © 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.051 seconds with 18 queries.