Transformer, 10K 1:1 - which one?

[valveitude]

leadbelly-

Which model, the WSM10K/10K, or the XSM10K/10K?

The XSM10K/10K

jrdmedford-

They cant take any DC current imbalance in the primary except for maybe a milliamp or so.

The Edcor site states that the AC+DC Current capacity is 50ma. I assume you meant the current needs to balanced referenced to the center tap. I don't see why you couldn't drive them with a SE drive stage, as long as your idle didn't exceed 25ma or so...then again maybe I'm missing something

-Casey

[Wavebourn]

How much would you pay for such a tranny: $11, or $120?

(The 1'st picture is for 20 Hz, the second is for 200 Hz, the third is for 20 KHz)

[jrdmedford]

I'd pay $11 for that. Here's why: The 20Hz performance is
impressive as its clearly passing the fundamental and the 2nd, 4th
etc very nicely. However, the 20kHz performance sucks - not
because of the phase shift, but the attenuation of the fundamental
is what, -1dB or so? I'd expect it flat out past 20kHz, perhaps
down to 60kHz because you start seeing attenuation.

Also, you are passing 0.5V. Lets see it with 10Vp-p...

I'm not saying that it wont sound good.... I'm sure it sounds wonderful since a slight knockdown at the top end of hearing tends to "round out" sound and make it more relaxed to the ear. Whats more, its not going to be shy in the bass.

Also, the nickel transformers are $120/pr, or $60 ea. Minus shipping.
The Edcor is $11. For $50 more, you are not paying DEARLY for improved performance. Consider if you are building "pro" gear, you
have to use wide-bandwidth stuff - because equipment gets chained together in the studio... How many -1dB cuts at 15kHz can you accept?

The other thing you get with Nickel is the permeability, which seems
to do something to the sound - i.e. attack, low-level dynamics etc.

-- Jim

[Wavebourn]

Originally posted by jrdmedford
I'd pay $11 for that. Here's why: The 20Hz performance is
impressive as its clearly passing the fundamental and the 2nd, 4th
etc very nicely. However, the 20kHz performance sucks - not
because of the phase shift, but the attenuation of the fundamental
is what, -1dB or so? I'd expect it flat out past 20kHz, perhaps
down to 60kHz because you start seeing attenuation.

Also, you are passing 0.5V. Lets see it with 10Vp-p...

I'm not saying that it wont sound good.... I'm sure it sounds wonderful since a slight knockdown at the top end of hearing tends to "round out" sound and make it more relaxed to the ear. Whats more, its not going to be shy in the bass.

Also, the nickel transformers are $120/pr, or $60 ea. Minus shipping.
The Edcor is $11. For $50 more, you are not paying DEARLY for improved performance. Consider if you are building "pro" gear, you
have to use wide-bandwidth stuff - because equipment gets chained together in the studio... How many -1dB cuts at 15kHz can you accept?

The other thing you get with Nickel is the permeability, which seems
to do something to the sound - i.e. attack, low-level dynamics etc.

-- Jim

Jim;
It is "Pro" from Altec-Lansing; far the more, if source would be as specified 600 Ohm instead of 50 Ohm I used...

I'll sell it on ePay for $30 and buy what you recommend for $11.

Speaking of modern studios, we build perfect amplifiers to listen to programs recorded on interconnected gear wilh 30 Ohm outputs and 100K inputs...

[Ryssen]

The Edcor site states that the AC+DC Current capacity is 50ma.

Would also like to if you can have a standing current of 50mA DC.