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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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28th May 2014, 10:33 am | #1 |
Nonode
Join Date: Aug 2010
Location: Resolven, Wales; and Bristol, England
Posts: 2,612
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RS "Heavy Duty" Output Transformer
Hi,
Has anyone got a copy of the data sheet suppled with the RS "Heavy Duty" Output Transformer? I have a transformer that came out of an ECL84 P-P amplifier butr I wonder what else it will do? Thanks,
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28th May 2014, 10:54 am | #2 |
Dekatron
Join Date: Sep 2007
Location: Oxfordshire, UK.
Posts: 4,311
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Re: RS "Heavy Duty" Output Transformer
One thing it may do is to earn a very decent financial return if you should choose to sell it. In the early days of Marshall guitar amplifiers they routinely used stock RS transformers. In some cases these were driven well past their rated capacity to get the kind of overload distortion that the guitarists liked. Now, when the obvious consequences of seriously overloading something duly come to pass, the owner of the amplifier will look around for a replacement. These early amps are worth a lot of money and the owner will not want to devalue his amp by using the 'wrong' transformer. If yours is one of the 'right' ones https://www.ig-transformatoren.com/m...nsformers.html he may well pay over the odds for it.
Cheers, GJ
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28th May 2014, 11:20 am | #3 |
Nonode
Join Date: Aug 2010
Location: Resolven, Wales; and Bristol, England
Posts: 2,612
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Re: RS "Heavy Duty" Output Transformer
Well, that would be a good thing since it looks too small for me to use in my latest project, but I don't see 'my' transformer on that page. I've attached a photo of mine.
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29th May 2014, 1:23 am | #4 | |
Heptode
Join Date: Apr 2009
Location: Scratby, Norfolk, UK.
Posts: 651
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Re: RS "Heavy Duty" Output Transformer
Quote:
Is this any use? Kind regards Dave |
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29th May 2014, 6:45 am | #5 |
Nonode
Join Date: Aug 2010
Location: Resolven, Wales; and Bristol, England
Posts: 2,612
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Re: RS "Heavy Duty" Output Transformer
Hi,
I have that one - it's surprising that the price was so low!! There is a data sheet that was supplied with the RS output transformers showing how to connect the various taps to achieve the different ratios.
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29th May 2014, 6:04 pm | #6 |
Dekatron
Join Date: Apr 2005
Location: Bewdley, Worcestershire, UK.
Posts: 4,748
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Re: RS "Heavy Duty" Output Transformer
I have a 'pair', from which you may be able to deduce sufficient data! See the attached photos which I hope will be helpful. Your transformer appears to be the same as the upper one in the pictures below.
One transformer is an RS "Heavy Duty", the other is an RS "EL84" transformer which, crucially, has the connection data printed on it. I realise that the impedances are different, but the pin-outs may just be the same. The frame is slightly deeper on the Heavy Duty version but to all intents and purposes they look similar in other respects. Phil
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Phil Optimist [n]: One who is not in possession of the full facts Last edited by Phil G4SPZ; 29th May 2014 at 6:11 pm. Reason: Extra info added |
29th May 2014, 7:03 pm | #7 |
Nonode
Join Date: Aug 2010
Location: Resolven, Wales; and Bristol, England
Posts: 2,612
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Re: RS "Heavy Duty" Output Transformer
Thanks Phil. I think I have the same one as your "Heavy Duty"
My understanding is that the "EL84" and the "Heavy Duty" are essentially the same 15W transformer, except that the "EL84" has 43% taps on the primary for UL use as described on the label for yours. I will look at mine tomorrow and see if it has different windings to the "EL84" in your picture.
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29th May 2014, 10:20 pm | #8 |
Hexode
Join Date: Sep 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 475
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Re: RS "Heavy Duty" Output Transformer
Do these pages give you what you want?
http://www.hifiworks.co.uk/images_fu...%20output1.jpg http://www.hifiworks.co.uk/images_fu...%20output2.jpg http://www.hifiworks.co.uk/images_fu...%20output3.jpg http://www.hifiworks.co.uk/images_fu...%20output4.jpg regards, Steve. |
30th May 2014, 7:30 am | #9 |
Nonode
Join Date: Aug 2010
Location: Resolven, Wales; and Bristol, England
Posts: 2,612
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Re: RS "Heavy Duty" Output Transformer
Perfect!
Thank you.
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