Primary Z: 50, 200, 500 ohms
Sec: 50 K CT
Response: 20 - 20 KHz +/- 2 dB

Купил пару лет назад в Америке.
Описание продавца:
"For sale is a little step up box I built around a pair of UTC A-11 transformers, popular for this application.

The transformers themselves are hardcore vintage, and definitely used. The lived their first lives in a radio station. I had to open one of them up a bit to sort out a shorted terminal, but that issue (a loose blob of solder) is resolved. Wired as they are to the enclosure, they should never have any further problems.

The A-11 transformers are great candidates for passive step up duty. The case has "Multiple Alloy Shields for Extremely Low Hum Pickup." They have good bandwidth (20 - 20K), and as wired with an impedance ratio of 200:50K ohms, they provide a voltage ratio of approximately 1:16. I used them with a Denon DL103 cartridge into my Bottlehead Seduction phono pre, and they were very nice indeed.

I used stainless steel fasteners, 6N copper wire and silver solder when I built this, and there's a nice little silver-contact DPDT switch wired as a ground lift - it lifts the negative phases of the primary and secondary from the chassis ground. In my system it always sounded better connected, but you'll get to experiment with it in yours.

I'm selling these only because I have yet another pair of them for myself..."

Находятся в Киеве. Цена $350.
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