On 6/20/2013 12:15 PM, Allen Brier N5XZ wrote:
I will be getting an ICE 419A Bandpass filter soon at a good price. Wondering
what is the best way to control it with a K3. Suggestions?
Sorry to be the bearer of bad tidings, but the "good price" for ICE
419-series filters is free. Several common problems.
#1, the relays get very flaky, and are hard to replace. Spraying them
with the "right" contact cleaner is about the best you can do.
#2, the filters don't handle anything close to rated power, and even
relatively small SWR (1.5:1) makes it worse. It's common for them to
fail (blown capacitors) with 100W. They'll probably be OK at the 40-50W
level needed to drive an amp.
#3, even when they're working they're not great filters.
#4, every ICE filter I've ever bought, new or used, was out of alignment
(high SWR, tuning not right). A filter that is out of alignment is more
likely to fry.
73, Jim K9YC
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