On Sat, 29 Jan 2005 12:29:57 -0500, Will Matney <craxd1@ezwv.com> wrote:
Roy,
I understand that. An air coil choke for 22 uH is not very big. I think
about 1/2" in diameter and about 2" long when using something like 22
gage wire. The point is that using a core will drop the number of turns
and the size of the choke. Down at 160 meters, it would drop the size a
good bit, or I would think. The 22 uH was given as a starting point to
go backwards from by showing how much impedance was needed to block the
RF effectively.
Will
On Sat, 29 Jan 2005 11:23:50 -0600, Roy Koeppe <royanjoy@ncn.net> wrote:
Will said:
"On 10 meters at 1 kW, you can get by with using
about 22 to 40 uH which is a pretty small choke when it's on a ferrite
core. (etc.)"
Will,
That's nice, but a 10 meter resonant SOLENOID air core choke is already
a very small physical size and it presents over a meg-ohm effective Z to
the tank circuit and cannot saturate and dissipates almost no power.
73, Roy K6XK/0
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