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impedance adapters

post #1 of 4
2/13/08 at 4:59pm
Thread Starter 
i was wondering how people made their impedance adapters, im a total diy noob and i couldnt find anything about it using search. any help would be great. thanks in advance.
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post #2 of 4
2/13/08 at 8:31pm
I've made a couple, one with the resistors in the middle of the small extension, and then this one with the resistors integrated into the plug. It looks neater and avoids another solder point. I also want to make one that's just a short adapter, no cable. That's my next project.

This one's a 22 ohm adapter, just enough resistance to silence the hiss found on nearly all DAPs using sensitive iems.





Happy soldering!
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post #3 of 4
2/13/08 at 9:11pm
Thread Starter 
thanks, for the pictures, they are very helpful
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post #4 of 4
2/14/08 at 5:06am
Quote:
Originally Posted by soul05 View Post
i was wondering how people made their impedance adapters, im a total diy noob and i couldnt find anything about it using search. any help would be great. thanks in advance.
Impedance adapters are usually referred to as a "balun," for balanced/unbalanced. They're also commonly used to adapt radio antennas for maximum power transmission.

If you'd like to read up on there, the balun Wiki is a good place to start:

Balun - Wikipedia, the free encyclopedia

You can also find a lot of material on calculating and building these from the ARRL, RSGB, and various amateur radio sites.
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