E-I transformers for SS?

sam9 · 24th July 2005, 11:49 PM

I've used Plitron an A-L toroids for my SS amps. I'm curious, are there any "off the shelf" sources E-I transformers with equvalent ratings"?

For example as 500VA, 33-0-33? Hammond and a couple of other seem sutable fot tube amps but nothing that fits SS. Spending some time with Google suggests that any sources are in the Far East and probably only ship pallet loads.

I have no theory that E-I's have an advantage, it's just that I'd like to have the option to satisfy my curiosity.

Maybe, I just cant think of the right Google keywords.

gl · 25th July 2005, 06:38 PM

Hi Sam9,

There are lots of local E-I options out there. Try Signal Transformer - it's now a division of Belfuse. Just Google for that then search for their part # 56-12. Keep in mind that you can change the output voltage by changing to one of the two alternate input taps. These units are expensive and ugly but they are super solid and almost indestructable.

On the Hammond site search for part # 167S64. It looks pretty close to what you want. Again I've used Hammond E-I stuff for years and think very highly of it.

Check out the blow-out specials on the PartsExpress site. You may have to use multiple transformers but at $5.00 apiece you won't feel too bad if it doesn't work out.

Good Luck.

Cheers,
GL

sam9 · 25th July 2005, 08:47 PM

Thanks. Especially for Signal Transformer. The Hammonds look like they might be a little light on the VA rating, but it's good to know about just in case.

Ebay is a possability but a lot of the sellers know niether the secondary voltage or the VA so it would be a crap shoot.

gl · 25th July 2005, 09:32 PM

I use the weight to figure the output amperage. They usually give you the voltage and unit weight so find a similar transformer and you've got the current. Transformer manufacturing is amazingly consistent compared to lots of other components like FET's for instance.

Regards,
GL

24th July 2005, 11:49 PM	#1
sam9 diyAudio Member Join Date: Jun 2002 Location: Left Coast	E-I transformers for SS? I've used Plitron an A-L toroids for my SS amps. I'm curious, are there any "off the shelf" sources E-I transformers with equvalent ratings"? For example as 500VA, 33-0-33? Hammond and a couple of other seem sutable fot tube amps but nothing that fits SS. Spending some time with Google suggests that any sources are in the Far East and probably only ship pallet loads. I have no theory that E-I's have an advantage, it's just that I'd like to have the option to satisfy my curiosity. Maybe, I just cant think of the right Google keywords.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Help identifying a pair of output transformers and power transformers	mjk130	Parts	3	30th January 2009 10:44 AM
FS: Transformers	alexcd	Swap Meet	0	19th November 2008 08:34 PM
WTB : Transformers	korben69	Swap Meet	1	27th June 2008 06:05 PM
my first amp (transformers???)	fitchmicah	Chip Amps	5	7th January 2007 07:26 PM
Back to Back transformers as Isolation transformers	mikee55	Chip Amps	2	17th March 2006 11:38 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

25th July 2005, 06:38 PM	#2
gl diyAudio Member Join Date: Dec 2003 Location: Sierra Foothills - California	Hi Sam9, There are lots of local E-I options out there. Try Signal Transformer - it's now a division of Belfuse. Just Google for that then search for their part # 56-12. Keep in mind that you can change the output voltage by changing to one of the two alternate input taps. These units are expensive and ugly but they are super solid and almost indestructable. On the Hammond site search for part # 167S64. It looks pretty close to what you want. Again I've used Hammond E-I stuff for years and think very highly of it. Check out the blow-out specials on the PartsExpress site. You may have to use multiple transformers but at $5.00 apiece you won't feel too bad if it doesn't work out. Good Luck. Cheers, GL

25th July 2005, 08:47 PM	#3
sam9 diyAudio Member Join Date: Jun 2002 Location: Left Coast	Thanks. Especially for Signal Transformer. The Hammonds look like they might be a little light on the VA rating, but it's good to know about just in case. Ebay is a possability but a lot of the sellers know niether the secondary voltage or the VA so it would be a crap shoot.

25th July 2005, 09:32 PM	#4
gl diyAudio Member Join Date: Dec 2003 Location: Sierra Foothills - California	I use the weight to figure the output amperage. They usually give you the voltage and unit weight so find a similar transformer and you've got the current. Transformer manufacturing is amazingly consistent compared to lots of other components like FET's for instance. Regards, GL

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)