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Old 11th January 2010, 09:21 PM   #31
Ava12 is offline Ava12  Germany
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Wow! Thank you h_a. Didn't find anything last time I visited the site, my french is quite bad.
Greetz
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Old 11th January 2010, 09:31 PM   #32
tinitus is offline tinitus  Europe
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Those look tempting
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Old 12th January 2010, 03:15 PM   #33
h_a is offline h_a  Europe
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These are pretty nice units and the ones I have on hand are made by Shilchar/India. Though the internet tells you R-cores have low interwinding capacitance, these units come with an electrostatic screen Won't hurt certainly.

These R-cores tolerate some DC before humming and the magnetic stray field is pleasantly low.

Have fun, Hannes
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Old 1st August 2010, 10:47 PM   #34
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Default Bump,

I am looking for a US based supplier of R-Core transformers. Specifically I seek a 30-50 VA, dual secondary, 15V/15V R-core. Anybody know a US based supplier who will sell single units?
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Old 6th August 2010, 02:28 AM   #35
BrianL is offline BrianL  United States
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I don't think there is such a thing as a "US based supplier" for R-core transformers. At best you find someone who specifies a design and then imports from the far-east. Of the few such "US based" companies I have found, none appear to be set up for selling small quantities, though I have not specifically inquired, just merely looked at their web pages.
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Old 26th January 2011, 05:14 PM   #36
Telstar is offline Telstar  Italy
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Bumping cause I need high voltage rails (80-90V) possibly C-core or R-core.
I've asked to a couple of local manufacturers and waiting for answer.
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Old 24th October 2011, 05:00 AM   #37
braxus is offline braxus  Canada
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Im not a tech myself, so I don't have a lot of knowledge in the field.

What Im after is I have a Sony TC-KA7ES cassette deck which is a Japanese only model. So it runs on 100 volt 50 hz power at 27 watts.

Im wondering if the stock Sony dual R core transformer can be replaced with a similar unit, but be able to run on North American 120 volt 60 hz power at 27 watts?

If so is there a part number I should look for with Sony that would work on this swap? If Sony doesn't have a unit that will work, what other R core options do I have?
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Old 30th November 2011, 11:18 PM   #38
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Braxus;
Only starting to look into this myself but you should note BrianL's post #35 above. Google up "R Core Transformers" and see what's available on the North American continent. You should jot down all the specs for the transformer and then go looking - finding 120v/60hz would be standard but the output and Va rating need to match as well. It may be that 27w is not available off the shelf and you may have to ask a company to custom wind that transformer. The other option would be to find something very close and have the power regulation of the unit altered to suit. Others more qualified to speak about transformers could add more.
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