[FoxHunt] feedthrough capacitors/EMI filters

[Joe Mayenschein]

I use the ones from Hamtronics all the time for all my projects.

Joe

Matthew Francey wrote:

> I have an old doppler project that I am resurrecting.  It was based on a
> 68HC11, and was successfully implemented and used on a few hunts in 1994
> and 1995).  At the time, someone gave me a few feedthrough capacitors
> in an effort to squelch the compu-shriek from weasling its way from the
> microcontroller, into the antenna switcher, and then into the radio.
>
> I'm currently looking for a bunch of feedthrough capacitors, or even
> better (based on some grepping's of the net) EMI filters.  They have to
> be fairly small (~1cm diameter), and should be low-pass as the signals
> are TTL-level digial control lines and vary <1kHz.  While they all have
> to conduct DC, most of them don't need to carry signifigant currents,
> though at least one will have to take maybe a hundred milliamps (if that)
> at +12V: everything needs a power supply.
>
> Can someone recommend a part+source?  Thanks!
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