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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: Using toroid AC mains tranny for output transformer question??? posted by grhughes on July 1, 2012 at 05:44:04:
I have used 50VA units before as SE output transformers either parallel feed or using a secondary fed with a high impedence to offset DC in the primary . 230:6+6 can be used with secondaries in series in place of a 3k TX in parafeed or 230:9+9 can be used as a 5K unit if a secondary is used as offset winding . What limits the useability is the primary inductance and saturation , so best to use low Ra valves and use for low power applications . 50VA units have a good 25H in the primary , it is unlikely that 70/100V matching transformers will exhibit anything like this (or have top end as extended as toroids)
Al
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Follow Ups
- RE: Using toroid AC mains tranny for output transformer question??? - Al Noakes 01:38:21 07/02/12 (4)
- RE: Using toroid AC mains tranny for output transformer question??? - Michael Koster 08:40:43 07/02/12 (3)
- RE: Using toroid AC mains tranny for output transformer question??? - Al Noakes 08:50:05 07/02/12 (2)
- Thanks Al! You got any suggestions or manufac type numbers? - grhughes 11:47:15 07/02/12 (1)
- RE: Thanks Al! You got any suggestions or manufac type numbers? - Swanson 12:18:52 07/02/12 (0)
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