[AMPS] Re: Solenoid Plate Chokes

[Roy Koeppe]

Hello,

A trick I learned for testing them another, reassuring way is to mount them
into position, with the "bottom" grounded. Then dip the tank's resonant
freq. both with and without the "top" connected to the tank.  A
high-performance choke should be nearly "invisible" or "transparent" to the
tank's resonant freq.

160M is often a special case, as many chokes have reactance reflected into
the tank due to too high of a fundamental parallel self-resonant freq. of
the choke. This causes the need for more C1 capacity in the pi-net, and
increased circulating currents in the choke itself.

Fun,      K6XK


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