[CQ-Contest] Bandpass filters

John Unger w4au at contesting.com
Fri Dec 3 08:17:55 EST 1999

I recently bought a second 419 for my fledgling two-radio setup. I noticed
my "old" (~1 year) 419 showed flashing led's when transmitting on my 40/80
antenna, but that my "new" filter didn't. I called ICE and was told that the
new filter probably had bypass caps from the led's to ground whereas my older
unit did not. I check and he was correct; I installed some .01 uf caps and the
flashing went away. I was also told by ICE that installation of the caps would
not void the warranty.

73 - John, W4AU

> Anybody have any experience with this same problem? I have notice
> the LEDs flashing before to the cadence of the RF, so I thought perhaps
> they were acting like noise generators. 

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