I'm eager to see how that truck turns out and what solution you arrive at. In regards to those Transformers I didn't expect you to find one that fit those specifications because I believe it was tailor-made for that particular microphone. That's why I'm so eager to learn the magical characteristics of this Transformer that makes it do what it does so I could possibly replicate it in the future. As soon as I can get some inductance measurements of the primary and secondary winding to jot down in my notebook I might get brave enough to open this thing up and unwind it to count the number of wraps
impedance matching Transformers for audio
Discussion in 'CB Radio Forum' started by rabbiporkchop, Apr 13, 2016.
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Last edited: Apr 23, 2016
Reason for edit: not ready to unwind it yet -
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Found Rockwell Collins P/N: 677-0035-000
The price is $213 directly from Rockwell Collins or $16 from Surplus sales in Nebraska.
There's only 52 left in Nebraska which means once those are gone the price goes up to $213 each.
Last edited: May 10, 2016
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Did you order one?
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Not yet. I'm still looking at other options but I will definitely keep that one in mind.
After purchasing them for $2.50 from Telex 16 bucks is a hard pill to swallow but I will if I have to
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Tried this site? Didn't check it out, just took a casual glance.
http://www.lundahl.se/microphone/ -
They don't make anything close. It must be a 1:2 turns ratio and
150/600
150 primary / 600 secondary.
DC resistance through the primary 20 ohms.
DC resistance through the secondary approximately 86 ohms or whatever it was I posted earlier in this thread.
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Wow! The shipping for one little transformer from Surplus Sales is $7!!
rabbiporkchop Thanks this. -
Civilian version available for $69.00.
Pico part # G-29085 -
Surprised the transformer gurus neglected to mention that split primary and secondary windings can be connected for either 1:2 (150:600 S), 1:1 (600:600 S), or 2:1 (600:150 S) operation. Distortion, although specified for 600 S sources, will be further reduced by lower impedances.
This increases our options.Last edited: May 11, 2016
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http://premmagnetics.reachlocal.net/contactus
I guess I'm going to send my Transformer to these guys to have them reverse engineer it so they can make it available to the public
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