In Reply to: RE: What an astonishingly insightful (and iconoclastic) assessment of some formerly revered designs.... posted by hahax@verizon.net on March 21, 2017 at 20:08:15:
"Their topology(meaning it can't be cured) causes compression of the negative half of a signal relative to the positive half which is the source of the second harmonic. "
Yes, that's true with most tubes but some DHTs are very linear with even spacing between grid voltage lines.
Especially if you keep the load line reasonably horizontal using a high impedance load (higher than would normally be spec'd if max output power were the goal) keeping the tube operation away from where the grid lines "bunch up".
One also needs a lot of inductance in the single ended output transformer (most output transformer don't have enough) to keep the load line from turning into a "beach ball" in the presents of low frequencies.
One way around that is to bi amp and filter the low frequencies out of the SET amp.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
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Follow Ups
- RE: What an astonishingly insightful (and iconoclastic) assessment of some formerly revered designs.... - Tre' 21:05:07 03/21/17 (23)
- RE: What an astonishingly insightful (and iconoclastic) assessment of some formerly revered designs.... - hahax@verizon.net 19:54:53 03/22/17 (21)
- RE: What an astonishingly insightful (and iconoclastic) assessment of some formerly revered designs.... - Tre' 08:14:18 03/23/17 (0)
- RE: What an astonishingly insightful (and iconoclastic) assessment of some formerly revered designs.... - JKT 22:45:22 03/22/17 (19)
- RE: What an astonishingly insightful (and iconoclastic) assessment of some formerly revered designs.... - hahax@verizon.net 06:20:27 03/23/17 (18)
- RE: What an astonishingly insightful (and iconoclastic) assessment of some formerly revered designs.... - JKT 11:28:26 03/23/17 (17)
- RE: What an astonishingly insightful (and iconoclastic) assessment of some formerly revered designs.... - tube wrangler 20:44:32 03/23/17 (11)
- ? - Tre' 21:06:37 03/23/17 (10)
- rolled off at 3800Hz - Tre' 15:28:42 03/24/17 (8)
- RE: rolled off at 3800Hz - PakProtector 04:39:56 03/25/17 (0)
- RE: rolled off at 3800Hz - tube wrangler 20:19:59 03/24/17 (6)
- Really Dennis? - gusser 10:53:28 03/25/17 (1)
- RE: Really Dennis? - tube wrangler 18:25:54 03/25/17 (0)
- RE: rolled off at 3800Hz - Tre' 22:34:19 03/24/17 (3)
- RE: rolled off at 3800Hz - tube wrangler 09:26:31 03/25/17 (2)
- Sorry Dennis... - PakProtector 05:41:06 03/26/17 (0)
- Dennis , I'm saving this. (nt) - Tre' 13:02:29 03/25/17 (0)
- +1 - 91derlust 02:05:02 03/24/17 (0)
- RE: What an astonishingly insightful (and iconoclastic) assessment of some formerly revered designs.... - hahax@verizon.net 13:12:22 03/23/17 (4)
- RE: What an astonishingly insightful (and iconoclastic) assessment of some formerly revered designs.... - JKT 14:10:29 03/26/17 (3)
- RE: What an astonishingly insightful (and iconoclastic) assessment of some formerly revered designs.... - tube wrangler 14:21:36 03/26/17 (2)
- RE: What an astonishingly insightful (and iconoclastic) assessment of some formerly revered designs.... - JKT 14:26:24 03/26/17 (1)
- RE: What an astonishingly insightful (and iconoclastic) assessment of some formerly revered designs.... - tube wrangler 23:41:37 03/26/17 (0)
- another cool DHT - PakProtector 04:17:41 03/22/17 (0)