New Edcor opt, what would a 150ohm primary be used for? - Page 2 - diyAudio
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Old 19th November 2010, 10:37 PM   #11
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Yeah, the winding machine will stop automatically reaching 40% of the turns...
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Old 19th November 2010, 10:51 PM   #12
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I think this was one intended for use with Ixys depletion-mode mosfets in a transformer-coupled version of the "Delite" amp introduced at the 2009 Burning Amp fest.
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Old 20th November 2010, 12:14 AM   #13
Gordy is offline Gordy  United Kingdom
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Parallel 6C33 ?
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Old 20th November 2010, 12:34 AM   #14
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Gordy,

6C33 would mean 4 of them (each 6C33 likes to "see" about 600 ohms).
The transformer is rated for 25 watts, and the PPPPSE 6C33 amp would yield 40 watts or so...
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Old 20th November 2010, 01:14 AM   #15
Bigun is offline Bigun  Canada
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A tad off topic - but how does the quality of Edcor XSE OTs compare with Hammond - the Edcor's at roughly $17 for 10W (and 5W for GXSE) seem to be a lot cheaper than the Hammond range (except for the rather pricey Edcore model that started this thread) ??
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Last edited by Bigun; 20th November 2010 at 01:16 AM.
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Old 20th November 2010, 01:22 AM   #16
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by Bigun View Post
A tad off topic - but how does the quality of Edcor XSE OTs compare with Hammond
I think you need to compare with CXSE series, to get a fair figure
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Old 20th November 2010, 01:33 AM   #17
Bigun is offline Bigun  Canada
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No, I'm not looking for equivalent exactly. Let me rephrase my question. Hammond have two ranges of SE OTs, one is top-end, the other is their economical range. If I'm being stingy (which isn't unusual ) then I start looking for even cheaper options. Low and behold I find Edcor who have an even more economical option. But then I wonder if 'I get what I pay for' I must be giving up a lot of sonic performance. So I ask those who may know, do the cheapo Edcor transformers compare with the cheapo Hammond or are they totally crap ? agains, sorry for off-topic, but this thread got me thinking about Edcor for the first time.
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Old 20th November 2010, 01:41 AM   #18
Pano is offline Pano  United States
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Search a bit and you'll find several old hands here who prefer the Edcor OPT.
I have not compared them A/B, but the Edcors are OK by me. Ditto the line level iron.

They really are superb value for money.
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Old 20th November 2010, 01:52 AM   #19
tinitus is offline tinitus  Europe
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Bigun, maybe take a look at both home sites, Hammond and Edcor, and compare specs on frequency responses
might tell you more about what kind of quality you are looking at

other than that, I think we better get back to the special low impedance trafos presented here
be it autoformer or gapped OPT

I suspect both are best used with "parafeed" OTL designs ?
Or maybe making a stronger OTL head amp into a small flea amp ?
If being "parafeed" I suppose such SE OPT could just as well be used with PP design ?
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Old 20th November 2010, 02:29 AM   #20
Enzo is offline Enzo  United States
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If it were designed with MOSFETs in mind or for cathode follower duty, why would they label the winding leads Plate and Screen?

Why not contact Edcor and ask them what it was designed for?
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