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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Re: Ray, the whole point of using a choke input filter... posted by Ray Moth on May 6, 2007 at 11:38:51:
Huh? the schema I have of his amp (GA #4/1999)uses a 300mA/10H choke - which isn't small/light by anyone's standards, followed by a MOSFETregulator for the B+.Are we talking about the same thing?
My PP-1Ccircuit was always intended to be a very low cost unit to be sold in malaysia as a kit. In it's original form it even used a 25 watt toroidal power transformer as an OPT.
Later versions used good James OPTs and became something rather nice - but when it grew into the PP-2C with a choke input filter - it stepped up several levels of perfomance with no other circuit or parts changes.
QED!
Regards, Allen
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Follow Ups
- "avoid the use of a heavy and expensive choke" - Allen Wright 05:06:23 05/07/07 (5)
- Re: "avoid the use of a heavy and expensive choke" - Ray Moth 06:35:11 05/07/07 (4)
- Compared to the cost, size and weight of using Plitrons for... - Allen Wright 14:47:57 05/07/07 (3)
- Re: Compared to the cost, size and weight of using Plitrons for... - Ray Moth 00:35:47 05/08/07 (2)
- "It seems a choke-input filter (a real one!) is a hard act to follow" - Allen Wright 01:34:53 05/08/07 (1)
- Re: "It seems a choke-input filter (a real one!) is a hard act to follow" - drlowmu 06:27:31 05/08/07 (0)
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