MC step-up transformer

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#5
analog_sa said:
Couldn't see any mention of the most important parameter - core material. Why would you choose this in preference to a Lundahl or a Tribute?
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If you have time.....make your own mc transformer.

I made mine without a winding machine. It's easy to do but it's a lot of work. Just buy the best core you can find (probably a cobalt amorph core is the best and cost between €15 and €25 each)
 
#6
GazzaFloyd said:
Hi All

Looking at getting a new Cartridge maybe MC, but my Phono stage is MM only.
I like the Phono Stage I have so I would need a step Up Transformer, so do any of you here have experience with this

MC to mm Audio Stereo Step Up Cartridge Transformer | eBay

or are there other options at reasonable money out there?

Ps current thinking on a Cartridge DL-103

Thanks
Garry
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Why not use a head amp instead of a SUT?

AKSA (who have their own forum on these pages) offer the "Paris" head amp - JFET-based, battery powered. You can find details here:

::: Aspen Amplifiers :::

(scroll down the page)

I have one - IMO it's one of the best. It's also replaced SUTs for a few of my friends. 🙂 (And despite what Hugh says in the blurb, it was called the "Paris" ... because it "gives good head"! 😀 )


Regards,

Andy
 
#8
andyr said:
Why not use a head amp instead of a SUT?

AKSA (who have their own forum on these pages) offer the "Paris" head amp - JFET-based, battery powered. You can find details here:

::: Aspen Amplifiers :::

(scroll down the page)

I have one - IMO it's one of the best. It's also replaced SUTs for a few of my friends. 🙂 (And despite what Hugh says in the blurb, it was called the "Paris" ... because it "gives good head"! 😀 )


Regards,

Andy
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this looks interesting, but still pushes the budjet

Garry
 
#9
I am a huge advocate of good step-up transformers, and it's what I use. But... not here. The DL103 has a large DCR for a moving coil (50 ohms or so). That means you can have losses in the treble due to the leakage inductance of all but the very best (read: expensive) SUTs. I would second the use of a transformerless head amp. IMO, a bipolar transistor input is a better solution than an FET for this application, but I gather that you're not going to do your own design or a scratch-build?
 
#10
GazzaFloyd said:
I have no promlem doing a build, Have you got any plans?

Thanks
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The right material Metglas magnaperm 2714AF
http://www.manz-electronic.com/download_file.php?id=2838023a778dfaecdc212708f721b788

or you can use from Vacuumschmelze the 6025F (=the same as 2714AF)

This firm sells it:
MES Manz Electronic Systeme OHG | Softmagnetic products | Semiconductors | Busbars | Military and Space | Heat sinks

or the 6025F:
Online Catalog & Consulting

I used the 2714AF (MP3210P4AF) 40 primary windings and 600 secondary windings
An externally hosted image should be here but it was not working when we last tested it.
 
#17
I can open the links i sended, i don't know if more people here cannot open them.
You find the Al-value in the links also so it's easy to calculate the minimum windings required.

btw what else you want to know?

EUVL said:
> Could you elaborate about turns ratio for several gains and wire type? I need 1:10 20dB?

40-turn primary / 600-turn secondary is 1:15.
But this is only more parameter out of many ....


Patrick
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#18
The Denon DL-103R has an impedance of 14 ohm.
Would your above example in post #11 be suitable ?
What would be the typical leakage inductance ?
Should a shield be put on the outside ?

I am total idiot with transformers, so apologies for stupid questions.


Patrick
 
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