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In Reply to: Ultralinear patent posted by Ralph on September 14, 2023 at 14:00:22:
Are you saying that the plate curves for UL on the 6550 look bad because the UL tap is at 43% instead of 40%?Note, "When Hafler & Keroes talked about a 20% tap, they were talking in terms of impedance. This correspondes to a 40% tap in terms of turns ratio. They are actually the same thing but expressed in different units."
"When the screen grid of a tetrode is connected directly to the anode of the tetrode the resulting tube is efiectively a triode"
That is simply not true. Or at the very least, a tetrode connected as a triode does not automatically become a "good" triode.
I think you need to take Hafler/Keroes' words with a grain of salt.
BTW Hafler/Keroes didn't have just one number in mind. It was a range depending on what tube was being used.
"6. The combination in accordance with claim 1 wherein the tube types employed are selected from commercial types 6L6, KT-66, 5881, and 807, and wherein said screen grid loading falls in the range 18 per cent to 26 per cent."
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 09/14/23
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Follow Ups
- RE: Ultralinear patent - Tre' 14:32:20 09/14/23 (19)
- RE: Ultralinear patent - tube wrangler 17:32:51 09/15/23 (2)
- There is merit and validity in what Dennis says here, Sigh, nothing beats empirical knowledge!~nT - Cleantimestream 10:30:35 10/29/23 (0)
- Dennis, this guy is looking for you - Tre' 19:56:18 09/16/23 (0)
- RE: Ultralinear patent - Ralph 08:00:47 09/15/23 (6)
- RE: Ultralinear patent - Tre' 14:39:39 09/15/23 (4)
- RE: Ultralinear patent - Ralph 08:23:01 09/27/23 (3)
- these UL curves, from your link, are the same as the ones I posted. - Tre' 09:35:55 09/28/23 (1)
- RE: these UL curves, from your link, are the same as the ones I posted. - Ralph 09:57:51 09/28/23 (0)
- RE: Ultralinear patent - grindstone 20:13:30 09/27/23 (0)
- 40% Just what Acro claims is optimum - Tre' 13:32:19 09/15/23 (0)
- tung sol 6550 UL plate curves at the recommended 40% tap - Tre' 15:58:19 09/14/23 (0)
- From a Acro pamphlet on UL operation showing different tap values - Tre' 15:22:58 09/14/23 (7)
- Circling back to the OP - Pabloaguas 12:19:33 09/18/23 (6)
- RE: Circling back to the OP - Paul Joppa 22:06:29 09/20/23 (1)
- RE: Circling back to the OP - PakProtector 09:01:18 11/20/23 (0)
- Try the Russian 6E6P or perhaps the 6E5P - coronadope 14:41:58 09/18/23 (2)
- RE: Try the Russian 6E6P or perhaps the 6E5P - coronadope 14:50:36 09/18/23 (1)
- RE: Try the Russian 6E6P or perhaps the 6E5P - Tre' 17:18:43 09/18/23 (0)
- RE: Circling back to the OP - Tre' 13:50:14 09/18/23 (0)
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