On Jan 16, 5:17*pm, John Smith wrote:
On 1/16/2011 5:08 PM, bpnjensen wrote:

...
Thanks, Dave, but I am afraid I don't even know what these devices are
or how they'd be used.

This might help:http://www.iw5edi.com/ham-radio/?how...-traps-work,88

Regards,
JS

Sorry - I know what a trap is - but the thingies Dave linked to do not
look like anything in my experience.