On Thu, 28 Jan 2010 11:09:07 -0500, Tim Long wrote:
> Shorting the choke and with a grid dip meter,
The principal resonance is a parallel resonance with
its own stray capacitance. You should not have to short
anything to see this.
A better way to measure a choke like this may be the
voltage divider circuit that I use to measure ferrite
chokes. You need an RF generator and a good RF
voltmeter (could be a scope -- I use an HP spectrum
analyzer). See my RFI tutorial.
http://audiosystemsgroup.com/RFI-Ham.pdf
AND -- as Carl noted, more stray capacitance will be
added when you actually mount the choke and wire it
into the amp.
73,
Jim K9YC
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|