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| To: | [email protected] |
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| Subject: | Re: LF: JT9-1 questions |
| From: | DK7FC <[email protected]> |
| Date: | Wed, 05 Dec 2018 21:52:30 +0100 |
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Am 05.12.2018 21:23, schrieb Chris Wilson: I have got the photos of the bridge amp, very useful, will collect bits! Could the choke wound on the iron core of a transformer be wound on a scrap mains transformer toroid instead Stefan? Hi Chris,Yes of course. I took a 50 VA transformer core. Of course it can be a bigger core. The idea is to reduce the mains current spike when charging the caps. Depending on your mains impedance that peak current can be very high, a factor 10 above the rms value maybe. WIth the series L you can reduce that a bit. A more professional way would be to build a PFC supply, as used in most modern high power SMPS. But this is a project on its own. I didn't start it yet because it was not necessary. OK, i'll take the photos from the server again. 73, Stefan |
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