Output Transformers for an EL84 Push-Pull Amp

boneshaker · 26th April 2006, 07:27 AM

Hi,

I am looking for a pair of OTs for a 15W EL84 Push Pull amp (for 8 Ohm speakers).

It's a kit from World Audio Design (KEL84: http://www.world-designs.co.uk/acatalog/kel84.pdf ) and comes with stock OTs that are of comparable quality to Hammonds. This is a simple PP circuit. I am looking for a clear improvement over the stock OTs, without going overboard cost-wise - e.g. $800 for OTs would be overkill for this amp.

(The stock OTs come with ultra linear taps. Unfortunately, I couldn't get the exact specs of the stock OTs.)

Are there some specific manufacturers you would recommend? How about O-Netics?

Many thanks
Peter

rcavictim · 26th April 2006, 08:27 AM

Try and score a couple of vintage Heathkit EA-3 mono amps on ebay. These have very good ultralinear output xfmers designed for EL84 and go quite inexpensively. Another Heathkit amp that used P-P U/L EL84's and had the same excellent output iron is the AA-100 stereo amp. These were all circa 1960 or so.

graeme uk · 3rd August 2006, 07:52 PM

I just wuilt a WAD el84.
Have you tried the world designs forum?
Folks on there will point you in the right derection with modding this amp.
www.world-designs.co.uk

26th April 2006, 07:27 AM	#1
boneshaker diyAudio Member Join Date: Apr 2005 Location: Mainz	Output Transformers for an EL84 Push-Pull Amp Hi, I am looking for a pair of OTs for a 15W EL84 Push Pull amp (for 8 Ohm speakers). It's a kit from World Audio Design (KEL84: http://www.world-designs.co.uk/acatalog/kel84.pdf ) and comes with stock OTs that are of comparable quality to Hammonds. This is a simple PP circuit. I am looking for a clear improvement over the stock OTs, without going overboard cost-wise - e.g. $800 for OTs would be overkill for this amp. (The stock OTs come with ultra linear taps. Unfortunately, I couldn't get the exact specs of the stock OTs.) Are there some specific manufacturers you would recommend? How about O-Netics? Many thanks Peter

26th April 2006, 08:27 AM	#2
rcavictim diyAudio Member Join Date: Jun 2004 Location: Cool end of a soldering iron NW of Toronto	Try and score a couple of vintage Heathkit EA-3 mono amps on ebay. These have very good ultralinear output xfmers designed for EL84 and go quite inexpensively. Another Heathkit amp that used P-P U/L EL84's and had the same excellent output iron is the AA-100 stereo amp. These were all circa 1960 or so. __________________ I.Q.Test. Have you ever purchased a recreational snowmobile?

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3rd August 2006, 07:52 PM	#3
graeme uk diyAudio Member Join Date: Dec 2005 Location: essex	I just wuilt a WAD el84. Have you tried the world designs forum? Folks on there will point you in the right derection with modding this amp. www.world-designs.co.uk

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