[TowerTalk] ICE-419a Bandpass filter

Dave Hachadorian K6LL at ARRL.net
Tue Jul 22 16:55:14 EDT 2008

My buddy W7WW in Yuma got a list of capacitors from ICE
after he smoked 10 meters. I just talked to him on the
phone. He says, for 20 meters:

resonating: 2 - 940pf each
coupling: 240pf

As I remember, it is a tee arrangement with the "resonating"
caps on the left and right, going to ground, and the
"coupling" caps in the middle, in series with the RF path.

You can get these caps from Mouser. From our experience,
these caps do a radical change in value, rather than burning
up. You might want to get "snubber" caps. They are more
durable.  Mouser has those, too.

Dave Hachadorian, K6LL
Big Bear Lake, CA

----- Original Message ----- 
From: "Chuck N7BV" <ck2jones at yahoo.com>
To: <towertalk at contesting.com>
Sent: Tuesday, July 22, 2008 12:50 PM
Subject: [TowerTalk] ICE-419a Bandpass filter

> GD,
> Accidently xmitted 160m into the 20m section of the
> IC-419a Bandpass filter.  Now acts like an attenuator on
> 20m.
> Does anyone have a schematic they would share?
> Opened up the unit but see no burnt capacitors as mention
> previously on TowerTalk, so need to do some tracing.
> Thanks.  73, Chuck N7BV

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