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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: Single End Parallel Class A amps. posted by Cougar on February 12, 2014 at 16:18:31:
A KT-120 is not a triode, even when wired as a triode.Parallel tubes should give more power but IMO the whole point of SET has been thrown out with the bath water when you use triode wired beam power tubes (paralleled or not).
Direct Heated Triodes are very linear compared to triode wired beam power tubes.
IMO the term "SET" means only one thing, Single Ended Direct Heated Triode.
Here's what's wrong with push pull IMO.
You're counting on the two tubes being perfectly matched.
You're counting on the drive signal to be perfectly out of phase at all frequencies and having the exact same amplitude.
You're counting on the two halves of the primary winding of the output transformer to be perfectly matched at all frequencies.
When any of the above are not matched the signal gets degraded to some degree or another.
I know you're not talking about push pull but unless the two tubes in a single ended parallel amplifier are perfectly matched some of that same type of degradation will occur.
You won't have the purity of a true SET amplifier. (not to mention the lack of purity of a triode wired beam power tube to begin with)
If you want a SET amplifier, build or buy a true Single Ended Direct Heated Triode amplifier. That's the only way you'll know what all the fuss is about.
End of rant.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 02/13/14
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Follow Ups
- Warning, rant ahead. - Tre' 17:05:25 02/12/14 (11)
- RE: Warning, rant ahead. - ElWoodrow 13:59:57 02/15/14 (0)
- RE: 'Scuse me, while I shoot myself ;-} - amioutaline? 05:09:19 02/13/14 (9)
- What you need is a Bigger SET.... - drummerwill 17:18:07 02/13/14 (4)
- RE: What you need is a Bigger SET.... - RC Daniel 19:00:49 02/13/14 (0)
- RE: OK, 845 next, but.... - amioutaline? 18:24:23 02/13/14 (2)
- .. I like the sound of an 845..... - drummerwill 21:34:08 02/14/14 (0)
- How about an EML 1605? nt. - RC Daniel 19:04:08 02/13/14 (0)
- RE: 'Scuse me, while I shoot myself ;-} - Stuben 15:38:41 02/13/14 (2)
- RE: 'What DIY Forum? - amioutaline? 18:27:40 02/13/14 (1)
- RE: 'What DIY Forum? (vs SET forum) - zarniwoop 13:04:49 02/14/14 (0)
- RE: 'Scuse me, while I shoot myself ;-} - Tre' 12:31:34 02/13/14 (0)
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