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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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In Reply to: RE: It's not about the circuit boards..... posted by Palustris on February 21, 2015 at 09:24:10:
It's fine to disagree, but without any supporting statement to justify your assertion, the disagreement is unfounded. The Loftin White circuit is much more than just direct coupling; there are specific technical requirement that should be implemented to be considered to be a circuit derived from the Loftin White:
1. direct coupled driver to output tube
2. the driver tube derives its voltage from the cathode resistor of the output tube.
3. the last capacitor in the power supply bypasses to the cathode of the output tube.
Several contemporary topologies meet the criteria. Both the 'monkey' and the 'DRD' amps come to mind and predictably they are single ended just like the original; they derive their driver stage voltage from the cathode of the output tubes, and the last cap in the PS is bypassed to the cathode of the output tube.
The Acrosound 20/20 does not meet the criteria and I can think of no PP amp that does.
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Follow Ups
- RE: It's not about the circuit boards..... - Palustris 13:13:41 02/21/15 (1)
- There are various quotes directly from Keroes, link - viridian 13:29:56 02/21/15 (0)
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