Isolating Transformer. - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

Ed_Dinning · 28th Sep 2022, 8:20 pm

Hi Dougie, The transformers should work, but watch out for the core temps, especially if running at 1 Tesla or so.
Most modern lams that I use are 0.35mm thick, hence lower losses

Ed

ben · 28th Sep 2022, 10:23 pm

Thanks for the suggestions.
Also appreciated the suggestions for BT units and offers from other members but I am in Spain, so getting it here would likely be prohibitive; I also don't fancy carting a lump like that on a plane in my hand baggage!

Since the asking price of the one I pictured was quite high I have found one of very similar spec for half the price.

I'd be using it for audio, video and televisions (mostly under 24")

dougietamson · 2nd Oct 2022, 10:58 am

An informative and entertaining quest for isolation.

https://www.youtube.com/watch?v=9JinSfCKuNQ

Ben Humphrys · 2nd Oct 2022, 5:54 pm

Hi guys,

Thanks Ben for this post: I myself have been seeking isolation too, but not at any price.

Techman, thanks ever so much for that pointer to BT MCUs; I would not otherwise have been aware of their existence. I looked at my wife with big, sad eyes and asked her how much my life was worth. I was (grudgingly?) granted sufficient budget. So I put a snipe on that very same BT unit and won it for £15 plus postage.

joebog1 · 2nd Oct 2022, 10:34 pm

Thanks for the idea Mr Humphrys. That would get me a rolled up newspapaer and sent to the doghouse.
BUT I would be isolated, for a week at least.

.

Joe

markfff · 2nd Oct 2022, 11:43 pm

If you have a couple of similar LV transformers lying around the shop, you could make a poor man's isolation transformer by connecting them back to back.

28th Sep 2022, 8:20 pm	#21
Ed_Dinning Dekatron Join Date: Jan 2004 Location: Newcastle upon Tyne, Tyne & Wear, UK. Posts: 8,195	Re: Isolating Transformer. Hi Dougie, The transformers should work, but watch out for the core temps, especially if running at 1 Tesla or so. Most modern lams that I use are 0.35mm thick, hence lower losses Ed

28th Sep 2022, 10:23 pm	#22
ben Dekatron Join Date: Aug 2006 Location: Madrid, Spain / Wirral, UK Posts: 7,498	Re: Isolating Transformer. Thanks for the suggestions. Also appreciated the suggestions for BT units and offers from other members but I am in Spain, so getting it here would likely be prohibitive; I also don't fancy carting a lump like that on a plane in my hand baggage! Since the asking price of the one I pictured was quite high I have found one of very similar spec for half the price. I'd be using it for audio, video and televisions (mostly under 24") Attached Thumbnails __________________ Regards, Ben.

2nd Oct 2022, 10:58 am	#23
dougietamson Hexode Join Date: Mar 2019 Location: Edinburgh, Scotland, UK. Posts: 349	Re: Isolating Transformer. An informative and entertaining quest for isolation. https://www.youtube.com/watch?v=9JinSfCKuNQ

2nd Oct 2022, 5:54 pm	#24
Ben Humphrys Triode Join Date: May 2022 Location: Kirckcudbright, Dumfries and Galloway UK. Posts: 24	Re: Isolating Transformer. Hi guys, Thanks Ben for this post: I myself have been seeking isolation too, but not at any price. Techman, thanks ever so much for that pointer to BT MCUs; I would not otherwise have been aware of their existence. I looked at my wife with big, sad eyes and asked her how much my life was worth. I was (grudgingly?) granted sufficient budget. So I put a snipe on that very same BT unit and won it for £15 plus postage.

2nd Oct 2022, 10:34 pm	#25
joebog1 Banned Join Date: Jun 2015 Location: Mareeba, North Queensland, Australia Posts: 2,704	Re: Isolating Transformer. Thanks for the idea Mr Humphrys. That would get me a rolled up newspapaer and sent to the doghouse. BUT I would be isolated, for a week at least. . Joe

2nd Oct 2022, 11:43 pm	#26
markfff Tetrode Join Date: Aug 2021 Location: Virginia Beach, Virginia, USA Posts: 79	Re: Isolating Transformer. If you have a couple of similar LV transformers lying around the shop, you could make a poor man's isolation transformer by connecting them back to back.