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Need help with amplifier HF rolloff  in ECL82 SE
Need help with amplifier HF rolloff  in ECL82 SE
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Old 12th December 2018, 12:49 AM   #21
SemperFi is offline SemperFi  Wake Island
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Congrats. Wow - nice OPT! Expencive but surely a good investment if you can afford them.
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Old 12th December 2018, 01:05 AM   #22
mike567 is offline mike567  United States
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the chinese Raphaelite transformers were the bad performance on the 4 ohm tap. Would be nice to know how they worked for you on the 8 ohm tap.
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Old 12th December 2018, 01:14 PM   #23
Lowrideris is offline Lowrideris
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Join Date: May 2015
raphaelite both 4 and 8 ohm taps sounds good. only HF rolling off , but overal very nice OPT , very sweet, fast sounding, a little muchy ,muddy compared to hashimoto.

overal hasimoto is very clean, transparent,dynamic, and very real life sounding ,. that is biggest hashimoto positive.
uploading hasimoto FR plot on my ecl82 in triode mode.

Click the image to open in full size.

if anyone wants bargain raphaelites, i sell now them. model is OP5K8A for 110 usd

Last edited by Lowrideris; 12th December 2018 at 01:16 PM.
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Old 13th December 2018, 03:58 PM   #24
hpeter is offline hpeter  Slovakia
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Quote:
Originally Posted by Lowrideris View Post
I believe i have problem with miller effect
yeah, thats why i came from anode resistor to fet gyrator ecc83 driving 2a3.
sound improved a lot.
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