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Old 19th November 2010, 04:07 PM   #1
athos56 is offline athos56  United States
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Default New Edcor opt, what would a 150ohm primary be used for?

I saw this on the Edcor new product page, what would you use this transformer for?

EDCOR Electronics Corporation. CXSE25-8-150

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Old 19th November 2010, 04:14 PM   #2
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Cathode follower output?
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Old 19th November 2010, 04:26 PM   #3
tinitus is offline tinitus  Europe
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here's another one
Softone Matching Transformer MT-72 & MT-128 for SEPP Amplifier
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Old 19th November 2010, 04:33 PM   #4
JLH is offline JLH  United States
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How about a FET follower?
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Old 19th November 2010, 07:50 PM   #5
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Could be nice with 4x EL86/6CW5 in parallel SE.
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Old 19th November 2010, 08:43 PM   #6
athos56 is offline athos56  United States
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I kinda have a feeling someone paid to have this opt designed, maybe we'll see a project around here. I keep kicking around the idea of paying for a 32ohm opt for headphone use. The design costs are pretty low I'm surprised more people don't pay for custom opts from Edcor.
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Old 19th November 2010, 09:16 PM   #7
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Old 19th November 2010, 09:27 PM   #8
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Pete, cathode follower output would be a bad idea since a cathode follower output requires the same load as an plate follower output.
Tinitus, the Softone is a "matching" transformer, actually it is not a transformer but an autotransformer, meant for better loading of OTL amplifiers.
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Old 19th November 2010, 09:28 PM   #9
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I'm a bit surprised that Edcor doesn't state the maximum current rating for the transformer. I see that it's got an Ultralinear screen tap.
Perhaps it is designed for a bunch of little tetrodes or pentodes which are operated in parallel. Puzzling.
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Old 19th November 2010, 09:34 PM   #10
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I ordered custom OPTs from them, but anyway they added screen grid taps. They were 100W 10K P-P transformers, who would use that taps anyway? Looks like they add ultralinear taps to all OPTs routinely.
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