On Sep 1, 3:31*pm, Cecil Moore wrote:
wrote:
A common mode choke is used in RF applications, very true, but it
serves a filtering purpose, not a conversion of unbalanced to
balanced energy transfer or vice
versa. A common mode choke that operates well will turn
unwanted RF into heat or cause it to dissipate in its core or a
resistor etc..

The common "W2DU balun" works well as both choke and
balun function.
--
73, Cecil *http://www.w5dxp.com

Yes and I have to partially take back what I said; a balun CAN double
as a CM "choke" and a CM choke can double as a balun. If
one wishes to balance an unbalanced line with a CM choke, then the
impedance of the CM choke must match the source and the load, which
makes the CM choke a balun and no longer a choke :-)