2. analog
  3. 174942-171100

Step up transformer recommendation

I am looking for a SUT to work with my Rega apheta 3 and audio research PH3SE.  Had the apheta 3 with the Rega Fono MC just did not do it for me.  I am thinking I can use my PH3SE but need SUT. 

I liked the way the PH3SE sounded with REGA Exact 2.  Upgraded to Apheta 3 and Rega Fono and it was not the upgrade I hoped for.  Want to dump Rega Fono and use PH3SE with Apheta 3.

Any help please.

Thanks, Tony

agrogon

Showing 2 responses by dover

dover
2,187 posts
 

@agrogon 

Most of the advice offered above is nonsense and will not work.

Your Audio Research PH3SE is designed for MC's and has 54db of gain.

According to the manual it will suit MC's from 0.25mv up. Your Rega Apheta is 0.35mv, well above the minimum output required.

Most moving magnet phono stages have about 40db. Your PH3SE does not have a moving magnet input.

The use of a 1:15/1:20 mc transformer will probably end up with too much gain.

You should try your Rega Apheta straight in first. There are binding posts inside on the circuit board to attach loading resistors to achieve the optimum load.

I would suggest you order some 100ohm, 400ohm resistors from somewhere to experiment in addition to the standard 47k input.

 

dover
2,187 posts
 

@agrogon 

I would try and see if you can borrow a 1:10 transformer to see if the gain is right.

1:5 transformers are rare.

Have you tried the PH3SE straight in at 47k ?

K&K Audio offer reasonably priced MC step up's using Lundahl transformers.

Tthe basic kit using the LL9206 offers you 14/20/26 db selectable. They will build the kit for you - price is very reasonable. 20db is 1:10, 14db is 1:5 ( I think ).

http://www.kandkaudio.com/moving-coil-phono-step-up-kits/

 

 

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