I saw the ad for a 10Ω: 2K8 Permalloy Mc Phono Transformer. It amplifies +24 dB (16,7*)
I have a SPU MC element.
Right now I have an EAR phono stage that goes about 5 dB more than normal. Together it gives 27 dB
My current MC amplfier is a Nakamichi MC Booster MB-150 that has two settings: 22 dB and 38 dB; I use the low one and that works fine.
So the permalloy transformer would be fine.
Question: are these any good?
The bandwidth @ R = 10Ω is 20Hz ～ 85KHz -0.6DB so that looks goods but these stosries say nothing about overshoot and harshness of sound.
Any experiences?
I have a SPU MC element.
Right now I have an EAR phono stage that goes about 5 dB more than normal. Together it gives 27 dB
My current MC amplfier is a Nakamichi MC Booster MB-150 that has two settings: 22 dB and 38 dB; I use the low one and that works fine.
So the permalloy transformer would be fine.
Question: are these any good?
The bandwidth @ R = 10Ω is 20Hz ～ 85KHz -0.6DB so that looks goods but these stosries say nothing about overshoot and harshness of sound.
Any experiences?
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Transformers are one of those things where the only answer is you have to try it in your system with your cartridge.
I suspect this transformer will work very well. Do try it!
I suspect this transformer will work very well. Do try it!
Experiences with what? An unknown, possibly one off transformer?
Fwiw, all other things being equal, a permalloy core is less likely to sound harsh than any other.
Neat!
If you've never seen this before, it's the single best page on the internet regarding SUT - http://www.rothwellaudioproducts.co.uk/html/mc_step-up_transformers_explai.html
If you've never seen this before, it's the single best page on the internet regarding SUT - http://www.rothwellaudioproducts.co.uk/html/mc_step-up_transformers_explai.html
Very good thank you. I have several line transformers, that are hard to understand with their overshoot and he shows ‘just load it’ and test. I have a 10K:10K amorf transformer that is very very ringy. I have never used it because of that.
For that reason I am weary of the ALI products.
The Rothwell article gives good help to overcome mismatching.
Trust a Lundahl more . . even if it costs double. That is what many threads say.
I found this article about loading at Lundahl: http://www.kandkaudio.com/applications-guide/
For that reason I am weary of the ALI products.
The Rothwell article gives good help to overcome mismatching.
Trust a Lundahl more . . even if it costs double. That is what many threads say.
I found this article about loading at Lundahl: http://www.kandkaudio.com/applications-guide/
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I did load that 10k:10k, but was not succesfull. Even with 10K load the output had ringing.
I disconnected the windings ( it was 2:2 but not split) - Then I found that one of the windings gave phase shifts. But I'm to stupid pardon me I have so little knowledge of what I'm doing I gave up. So now I use it as choke.
Maybe I should re-attempt it. With a signal generator it is different from having a DC through the primary. The Chines webshop makes it hard too - no support.
Another bad experience is a 600Ω:600Ω Permalloy I have, an equally small one. That also rings like hell. I mean it is hard to tame, it needs a high load.
On the other hand, a Jensen FLPCH-123 I can test, straight like a ruler, even if I turn it upside down, do not load it, load it wrong. I think: ha, here we have real bifilair findings. Then I think, them Chinese have simple methods, just a stack of some windings is easy, ... 😢 So basic trust is low.
I disconnected the windings ( it was 2:2 but not split) - Then I found that one of the windings gave phase shifts. But I'm to stupid pardon me I have so little knowledge of what I'm doing I gave up. So now I use it as choke.
Maybe I should re-attempt it. With a signal generator it is different from having a DC through the primary. The Chines webshop makes it hard too - no support.
Another bad experience is a 600Ω:600Ω Permalloy I have, an equally small one. That also rings like hell. I mean it is hard to tame, it needs a high load.
On the other hand, a Jensen FLPCH-123 I can test, straight like a ruler, even if I turn it upside down, do not load it, load it wrong. I think: ha, here we have real bifilair findings. Then I think, them Chinese have simple methods, just a stack of some windings is easy, ... 😢 So basic trust is low.
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Hi triode_al,
I am sorry to post here, but how shall I contact you? I have seen this Tektronix 3B4 plugin you were selling a decade ago.
Regards Kostas