How good is a 10Ω: 2K8 Permalloy Mc Phono Transformer?

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?
 
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so I have two encouraging remarks.
The question is about an ali MC coil offer from LG Audio, 10 Ω, thus fit for the SPU.

This is the picture of the 20 ohm version (and 20Ω would not be my choice of course)

O1CN01qvRNKj2F5Gwr1alvS_!!50308828.jpg
 
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/
 
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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.
 
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Hi, That is one of the several Chinese variants being offered through Alli Express etc. Unfortunately S/Q wise you get what you pay for. So although it may work & most likely will not sound very good. The best budget SUTs are from Cinemags, they start at around $180,

Cheers
 
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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?
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