A serious comparison between UcD180 and UcD400

[maxlorenz]

I will ask again because noone seemed to notice my first question
Probably I will never get my hands on BIG R-core Tx.
Could a BIG (+/-2KVA) EI, 1:1 isolation transformer imitate the benefits expected with C-core or R-core Tx?

Thanks in advance.
Mauricio

 

[Coolin]

Yes.

Low frequency noise will be filtered very well and depending on winding method high frequency noise will be less as well but not to the same extent as an R-core.

Another way this can be acomplished for some part is by using two transformers in series (primaries)

 

[maxlorenz]

Dear coolin:
Thanks! 😀
Very kind of you.

Best wishes.
Mauricio

PS: and will block DC 😎

 

[pirinyo]

Yes I have 42.5/140 and I started to play with psu when I started to build the psu for the 42.5. Follow the www.acoustica.org.co.uk and look for psu, over there you will find good comparisons with R-core, C-core Toroids and different caps.

I played the 180 with the 42.5 (I had big trouble with the DIN connectors, very hard to do good cable due to soldering in extremely small spaces). Excellent stuffs I think. But this is not surprising I think the Naim's Preamp can drive everything and the UCD can be driven by everything...so nice! Naim's guy are very smart becauswe they give impresion that you can play a system only if it is all-naim based. I think this is false.

I hopo you will do experiment on that. If you do it, please let me know on kephaudio@yahoo.it

Bye for now,
KEPha

Hi!

Can you compared the NAIM NAP 140 and the Hypex 180 directly?

Please inform us about the difference in sound !

I am to order two hypex modules I am also have NCC200 Avondale amp with EAR tube preamp

 

[LTK]

Hi!

Can you compared the NAIM NAP 140 and the Hypex 180 directly?

Please inform us about the difference in sound !

I am to order two hypex modules I am also have NCC200 Avondale amp with EAR tube preamp

Sorry I can't help but I'm in the same position as you🙂 I already have NCC200 with a pair of cap-6 supply and a pair of Holden and fisher toroidals.
I also would like to know how the UCD's compare and if they would be a worthy upgrade

 

[lucpes]

My standard practice is to 'treat' every AC input (trafo input) with two ferrite chokes, one on hot and the other on neutral (like the ones you get from PC power supplies) and an 0.047uf capacitor - quality (polypropylene 400V or so) placed between hot and neutral after the chokes (across the trafo primary). Really makes things sound better at least in my case.