Let's See Your Transformers!

FullRangeMan · « **Reply #81 on:** 1 Jun 2015, 09:29 am »

Unfortunately at the Amplimo hi-fi page there is nothing.
Seems they work only w/made to order trafos, which is good.
http://www.amplimo.nl/en/products/highend-audio-transformers/

E55l2 · « **Reply #82 on:** 1 Jun 2015, 09:01 pm »

FullRangeMan · « **Reply #83 on:** 2 Jun 2015, 12:29 pm »

Well, they do only Toroidal!
What do you would say about the sound quality of a Toroidal OPT for a 20-25W GM70 SE?

rollo · « **Reply #84 on:** 2 Jun 2015, 02:42 pm »

Which transformer manf. in your opinion makes the ultimate transformer cost no object ?

charles

FullRangeMan · « **Reply #85 on:** 2 Jun 2015, 03:13 pm »

E55l2 is the transformer builder here.
My opinion is AudioNote, unfortunately $$.
Curious for his opinion.

E55l2 · « **Reply #86 on:** 2 Jun 2015, 03:41 pm »

'

Quote from: rollo on 2 Jun 2015, 02:42 pm

Which transformer manf. in your opinion makes the ultimate transformer cost no object ?

charles

FullRangeMan · « **Reply #87 on:** 9 Jun 2015, 01:19 pm »

E55l2,
I saw these Tribute OPTs are silver winding.
What do you think on silver OPTs??
It dont offer better sound?

E55l2 · « **Reply #88 on:** 9 Jun 2015, 03:09 pm »

E55l2 · « **Reply #89 on:** 9 Jun 2015, 04:15 pm »

JoshK · « **Reply #90 on:** 9 Jun 2015, 04:55 pm »

Quote from: E55l2 on 9 Jun 2015, 03:09 pm

Silver in transformer is just a waste of money. If your copperwire transformer has 0,21 dB loss a silver version will have 0,20dB.
That is way to less to justify the extreem price differance.

And the sound???

Remember that tubes never use silver, they use iron, molybdeen, nikkel, gold, carbon, tungsten, barium, aluminium but never silver. Just because there is no reason to use it.

Btw Tribute is not very special and he takes very very long time to deliver ( a lot people waited 6-12 month)

I get that silver doesn't lessen the resistive losses, but I thought the point of silver was that you could use smaller wire to effect other qualities like capacitive coupling, or ability to use high voltage rated insulation by offsetting some of the other issues. Basically, in short, if you wound a given transformer with copper wire versus silver wire would you have the same resulting bandwidth? Would the silver allow any wiring scheme flexibility that the copper might not?

E55l2 · « **Reply #91 on:** 9 Jun 2015, 05:13 pm »

FullRangeMan · « **Reply #92 on:** 9 Jun 2015, 07:29 pm »

E55l2,
The silver lower R is not useful??
How much lower is the R of silver in regards to copper?
Thanks

E55l2 · « **Reply #93 on:** 9 Jun 2015, 07:33 pm »

FullRangeMan · « **Reply #94 on:** 9 Jun 2015, 07:43 pm »

As a layman I ask what would be a better design in OPTs?
Thanks

E55l2 · « **Reply #95 on:** 9 Jun 2015, 07:55 pm »

FullRangeMan · « **Reply #96 on:** 10 Jun 2015, 11:28 am »

Thanks for your replies E55l2 you most kind.
I found a transformer builder that do a 3,5kg C core OPT, but he can not make a 7kg C core for OPT or power trafo, only EI.
As the C core is the same I wonder why this happen?

E55l2 · « **Reply #97 on:** 10 Jun 2015, 03:12 pm »

FullRangeMan · « **Reply #98 on:** 10 Jun 2015, 06:22 pm »

Talking of C cores I just found this interesting image.
Its the Yamamoto 45 amp, all transformers are C core:
Seems these cores be amorphous;

E55l2 · « **Reply #99 on:** 10 Jun 2015, 07:20 pm »