This is an attempt to un-confuse the One Bottle thread.
Please post any 417A project info here so Dave's amp can have it's own space.
Here is a scan that got me interested:
http://vacuumbrain.com/The_Lab/TA/Western_Electric/we417_1.bmp
and the circuit ....
Should have done this a while back, so Dave has a free hijack to any of my threads.
Data sheets lifted from the other thread:
http://www.pmillett.com/tubedata/HB-3/Miscellaneous%20Types/407-A.PDF
http://www.pmillett.com/tubedata/HB-3/Receiving-Type%20Industrial%20Tubes/5842_417A.PDF
http://www.pmillett.com/tubedata/HB-3/Miscellaneous%20Types/408-A.PDF
http://www.westernelectric.com/products/we417a/417A.pdf
And a pic of a proto 417 pre:
Please post any 417A project info here so Dave's amp can have it's own space.
Here is a scan that got me interested:
http://vacuumbrain.com/The_Lab/TA/Western_Electric/we417_1.bmp
and the circuit ....
Should have done this a while back, so Dave has a free hijack to any of my threads.
Data sheets lifted from the other thread:
http://www.pmillett.com/tubedata/HB-3/Miscellaneous%20Types/407-A.PDF
http://www.pmillett.com/tubedata/HB-3/Receiving-Type%20Industrial%20Tubes/5842_417A.PDF
http://www.pmillett.com/tubedata/HB-3/Miscellaneous%20Types/408-A.PDF
http://www.westernelectric.com/products/we417a/417A.pdf
And a pic of a proto 417 pre: