Quote:
Originally Posted by dieseljeep
My favorite would be a 5V4, slower heating, easier on electrolytics
The newer generation 6X5's were a lot more reliable. The 6X5G's seemed to be the real problem, especially in the pre-war Zeniths.
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That's what I was thinking because I had a 6X5GT tube in an old 1940s vintage Philco floor model radio (it was a later Delco replacement tube and not the original Philco 6X5G tube) and someone told me when I asked about it that it would still be a problematic tube because of it still being a 6X5 tube, but I had read on here and other antique radio forums that the 6X5GT tubes were more reliable than the 6X5G tube was.