In Reply to: Nice try ;-) posted by Chris O on August 29, 2012 at 14:50:13:
Chris.
Here is a very interesting thing for you to consider.
The Eimac 304TL has two filaments that can be wired in series or parallel.
when wired in parallel, all four sections cherry up at the same time. When wired in series, two will cherry up first then the other two will follow. The simple explanation to this is one pair of tubes is biased 6.3V away from the other causing it to draw more current and cherry up sooner. If you reverse the filament polarity the sections that cherry up switch.
Now here is the fun part. Take a single 75TL and watch how it cherries up.
what does this tell you?
dave
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Follow Ups
- RE: Nice try ;-) - dave slagle 18:00:24 08/29/12 (6)
- "What does this tell you?" - Chris O 08:07:52 08/30/12 (5)
- RE: "What does this tell you?" - dave slagle 08:47:20 08/30/12 (4)
- RE: "What does this tell you?" - Chris O 12:58:46 08/30/12 (3)
- RE: "What does this tell you?" - dave slagle 13:43:18 08/30/12 (2)
- RE: "What does this tell you?" - coffee-phil 08:38:50 09/08/12 (0)
- Then I guess you convinced me. (nt) - Chris O 14:24:55 08/30/12 (0)