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|7th December 2012, 04:28 PM||#1|
Join Date: Jul 2005
6A4, 46 and 47...excellent sound tubes !!!!
I'm currently testing the tubes 46, 47 and 6A4 in single ended triode and pentode modes.
I built a prototype in an aluminum tray.
I used a cardboard open baffle with a full range Trusonic 80FR and a Foster horn.
These old tubes play very well, watch the videos:
6A4 tube playing in pentode mode single ended class A:
Class A 6A4 direct heated pentode - YouTube
6A4 pentode in Class A - YouTube
46 tube playing in SE triode mode class A:
Cunninghnam 46 in triode mode. Class A - YouTube
Cunningham 46 in triode mode class A - YouTube
47 playing in SE pentode mode class A:
Raytheon 47 pentode in Single ended mode - YouTube
47 playing in SE triode mode class A:
Raytheon 47 in triode mode Single Ended Class A - YouTube
Which tube plays better in your opinion?
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