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FS: Moving Coil Step-Up
FS: Moving Coil Step-Up
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Old 8th January 2015, 04:33 PM   #1
cygnus x1 is offline cygnus x1  United States
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Join Date: Sep 2006
Default FS: Moving Coil Step-Up

Moving coil step-up with two Beyer Dynamic TR/BV 370 215 006 Audio input step up transformers, mounted in copper clad aluminum box with Gold RCA input and outputs. Wired with 30 ga. XLO 6/9s Copper/Teflon and Soldered with Cardas SN62.
These have split bifilar wound primaries with shield between primary and secondary windings. Configured as 1:30 50ohm/45Kohm. They can be terminated 1:15 200 ohm/45Kohm. Specs from Beyer Dynamic list tolerance as 30Hz to 15Khz +/- 1db. Standard frequency response is 20Hz to 70Khz. Listening test have good response to 10Hz. Not as good as my Lundahl but very respectable. As good as any Altec 4722. I can send Beyer Dynamic Tech Sheet. Will add Picture soon.

Priced for quick sale, $100.00 + Ship. PayPal Gift please.
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Old 10th January 2015, 08:39 PM   #2
cygnus x1 is offline cygnus x1  United States
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Join Date: Sep 2006
Added pictures. Not pretty, could use polished, but shields real well.
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File Type: jpg DSCF1068.JPG (608.9 KB, 119 views)
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Old 12th January 2015, 12:02 PM   #3
cygnus x1 is offline cygnus x1  United States
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Join Date: Sep 2006
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