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Old 8th January 2014, 06:10 PM   #1
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Default O'netics, Electra Print: anyone have both?

Hello,

I know there are endless, desperate pleas for advice on "Which OPT is BEST"

This is not what I am asking. I am going to rebuild my SE EL34 amp as point to point so that I can try changes in topology easier (and for the fun of it). Thought I might buy some new OPTs and after talking to both O'netics and Electra Print briefly I have narrowed it down to these two winders.

Just wondering if anyone has used both and could give me their subjective experiences on the differences between the two.

Thanks!!
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Old 9th January 2014, 01:00 AM   #2
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Not to bash vendors, but I have not had the greatest experience with either of them. Specifically interstage transformers from ONetics and power transformers from Electraprint. I still have ONetics OPT on my 300B PP which functions fine enough, but I have a pair of Lundahls that perform better; just haven't had the time to mount them.
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Old 9th January 2014, 01:31 AM   #3
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Quote:
Originally Posted by zigzagflux View Post
I still have ONetics OPT on my 300B PP which functions fine enough, but I have a pair of Lundahls that perform better; just haven't had the time to mount them.
Could you give us the part #'s for the Lundahls and the price and specs for the O'netics ?
t.i.a.
dennis
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Old 9th January 2014, 02:13 AM   #4
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Quote:
Originally Posted by zigzagflux View Post
I still have ONetics OPT on my 300B PP which functions fine enough, but I have a pair of Lundahls that perform better; just haven't had the time to mount them.
Thanks for your response!

I've been looking at Lundhauls, too. Which model do you have? Also, what are the spec's on your O'netics OPTs?

When you say the Lundhauls perform better: have you had them wired into the same amp, or do you mean they test better? If you have listened to them, what would you say the differences are? How would you characterize them?

Thanks again for your time!

Best,
John
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Old 9th January 2014, 02:56 AM   #5
wicked1 is online now wicked1  United States
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I replaced onetics transformers on my 300b w/ hashimoto's. The hashimoto's are much better. (That's not much of a comparison, though)
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Old 9th January 2014, 04:07 AM   #6
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Which Hashimotos are you using now? What didn't you like about the Onetics? What do you like better about the Hashimotos?
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Old 9th January 2014, 01:21 PM   #7
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The only specs I have on the ONetics OPT was 6600 to 4, 8, and 16 ohm output. Weigh 4.7 lbs with a core 3.1"x3.7"x1.3". Rating of 205VAC at 20-20kHz and 150ohm DCR on primary. It's been a number of years since I purchased them, so I don't have any record of the price. They were either Level 1 or 2 if I recall.

The LL-1620PP (non-amorphous) was temporarily wired in with flying leads to make measurements and listening tests. As almost always is the case with my projects, measurements confirmed what my ears were hearing. Lower measured distortion was obvious, and within 30 seconds of listening tests there was no question from myself and others that the Lundahl won. Again, it's been a number of years since the tests, so I couldn't provide any audiophile jargon to describe the differences. All around the Lundahl was just more 'correct' and 'natural'. I never installed them (still have the ONetics installed), but rather purchased a set of amorphous core 1620's a year or two later when a used set came available online. Just need to get around to installing them.
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Old 9th January 2014, 03:58 PM   #8
wicked1 is online now wicked1  United States
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For me, the onetics were just never quite right. I was always wanting to tweak the amp to get it to sound better. The Bass was a little light, and I could not match up subs w/ it for the life of me. (phase issues?) They were the least expensive onetics, and were the 3.5k (or was it 3.3k) primary.

The hasimotos are the 25-5, or soemthing.. 25 watt, 5k primary. So, not exactly the same setup.
They are awesome!! Everything is perfect.. bass is good, subs blend in just fine.. I haven't wanted to 'tweak' any settings in the amp since these TX's were installed.

But to be fair to onetics.. I think they were 120 each or something, where the hashimotos were about 600 each!

Last edited by wicked1; 9th January 2014 at 04:13 PM.
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Old 9th January 2014, 09:48 PM   #9
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I haven't tried Onetics so can't help with a specific comparison. However, I have had very good results with Electra-Print especially Jack's Partial Silver Secondary series. I used a pair of regular E-P OPTs for my SE 46 amps for a couple years and liked them a lot. But when I replaced them with PSS E-P, there was a noticeable improvement across the board. Considering the relatively low price, the PSS transformers are a tremendous bargain. Jack is also very quick in supplying units.
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Old 10th January 2014, 01:37 AM   #10
lausar is offline lausar  United States
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Default Primary

Quote:
Originally Posted by Salectric View Post
I haven't tried Onetics so can't help with a specific comparison. However, I have had very good results with Electra-Print especially Jack's Partial Silver Secondary series. I used a pair of regular E-P OPTs for my SE 46 amps for a couple years and liked them a lot. But when I replaced them with PSS E-P, there was a noticeable improvement across the board. Considering the relatively low price, the PSS transformers are a tremendous bargain. Jack is also very quick in supplying units.
Did you go with a 5k primary? I just finished my 1st DIY SET amp and I'm trying 2A3, 45 and 46 tubes with their respective OP's. Wondering if anybody has actually tried 6.4k primary with the 46.
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