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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: Ultrasonic AC for DHT Filament posted by Triode Kingdom on March 4, 2003 at 00:12:36:
I could be wrong, but I wouldn't be sure that the output of this device is actually AC. It may very well be DC, and the "> 20kHz" is just the switching frequency. Might just be a plain 'ole switching power supply.I have used an isolated DC-DC converter on the 813, using a switching frequency of ~100kHz, and a small common mode choke. Works very well.
So, is it true that nobody in here has tried true sine-wave ultrasonic AC? Sounds like a challange... What would be the tube of choice? 300B is easier than 211...
Pete
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Follow Ups
- Re: Ultrasonic AC for DHT Filament - Pete Millett 03/4/0308:54:11 03/4/03 (25)
- David Berning has been using ultrasonic AC for quite some time. - Tom §. 05:02:40 03/5/03 (0)
- Re: Ultrasonic AC for DHT Filament - Ivan303 20:53:02 03/4/03 (23)
- Re: Ultrasonic AC for DHT Filament - dave slagle 10:03:31 03/5/03 (14)
- Re: Ultrasonic AC for DHT Filament - Triode Kingdom 13:20:26 03/5/03 (13)
- Re: Ultrasonic AC for DHT Filament - dave slagle 10:18:52 03/6/03 (11)
- Yes! - Gary P 16:51:00 03/6/03 (1)
- Re: Yes! - dave slagle 18:42:21 03/6/03 (0)
- Re: Ultrasonic AC for DHT Filament - Triode Kingdom 13:23:54 03/6/03 (7)
- Re: Ultrasonic AC for DHT Filament - dave slagle 18:05:40 03/6/03 (6)
- Re: Ultrasonic AC for DHT Filament - Gary P 11:12:49 03/7/03 (4)
- Re: Ultrasonic AC for DHT Filament - dave slagle 12:12:04 03/7/03 (3)
- Re: Ultrasonic AC for DHT Filament - Gary P 07:05:26 03/8/03 (2)
- Re: Ultrasonic AC for DHT Filament - dave slalgle 18:49:50 03/8/03 (1)
- Re: Ultrasonic AC for DHT Filament - Gary P 21:48:41 03/8/03 (0)
- Re: Ultrasonic AC for DHT Filament - Triode Kingdom 07:55:00 03/7/03 (0)
- Agreed! - Pete Millett 13:22:35 03/6/03 (0)
- Re: Ultrasonic AC for DHT Filament - Retsel 10:16:58 03/6/03 (0)
- Re: Ultrasonic AC for DHT Filament - Ed Sawyer 08:47:31 03/5/03 (7)
- Re: Ultrasonic AC for DHT Filament - Retsel 13:19:29 03/5/03 (6)
- Re: Ultrasonic AC for DHT Filament - dave slagle 10:24:52 03/6/03 (4)
- Re: Ultrasonic AC for DHT Filament - Retsel 10:56:06 03/6/03 (3)
- Re: Ultrasonic AC for DHT Filament - dave slagle 11:49:59 03/6/03 (2)
- Re: Ultrasonic AC for DHT Filament - Retsel 12:36:07 03/6/03 (1)
- Re: Ultrasonic AC for DHT Filament - dave slagle 18:20:36 03/6/03 (0)
- Re: Ultrasonic AC for DHT Filament - Ed Sawyer 15:33:25 03/5/03 (0)
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