In article ,
Angela & Gary wrote:

I'm looking for plans to build a balanced tuner for ladderline without a
balun. In the past, I've seen schematics for tuners with ganged
inductors. Can't seem to stumble back upon these on a web search. Any
ideas and thanks in advance.

You'll need some form of inductively coupled ("link-coupled") tuner to
do this. The most popular of these at the moment seems to be the
"Z-match" - it has good although not perfect current balance on the
outputs.

Most of the Z-match designs I've seen can be implemented with two
variable capacitors, and one fixed inductor. There's a "two coil"
Z-match but I gather that it doesn't really have advantages over the
one-coil variety. The coils can be either air-wound, or wound on a
powdered-metal toroid.

--
Dave Platt AE6EO
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