Need help restoring my 40-180 - SUCCESS
Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand
State, Province, Country: Indiana
It *was* a running design change, and it is documented.
The first 40-150, 155, 180, etc. sets used a 7J7 tube. Then Philco switched to 6J8G. Then they switched back to 7J7.
Don't know why. Maybe they ran into a shortage of 7J7 tubes and used 6J8Gs until they could get 7J7 tubes again?
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Ron Ramirez
Ferdinand IN
Messages In This Thread
RE: Need help restoring my 40-180 - by Ron Ramirez - 08-28-2013, 08:28 PM
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