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Author Topic: Binocular cube cores  (Read 784 times)
9H1FQ
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Posts: 144




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« on: February 28, 2012, 11:13:45 PM »

Anyone has details please, of a 1:6 or/and 1:9 and other less popular ratios of balun xformer, using a binocular cube core, like the BN61.
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TANAKASAN
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Posts: 933




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« Reply #1 on: March 01, 2012, 05:29:34 AM »

Try the following for starters:

http://home.earthlink.net/~christrask/TraskTLTTutorial.pdf

Tanakasan

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K9FV
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Posts: 479




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« Reply #2 on: March 01, 2012, 06:35:33 AM »

This might give you a bit more info: http://www.rfpowersystems.com/products.htm

Note that on this type of transformer, the tubes thru the core are the single turn, while the wires are the secondary.  Thus a transformer with 3 turns is a 1:9 ratio.  4 turns is 1:16 ratio.  The ratio is always 1:(N*N) or the number of turns squared.

RF Power Systems has some pretty good drawings of the transformers - they are not that hard to make if you've got the ferrites.

73 de Ken H>
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