[TowerTalk] ICE-419a Bandpass filter

[Mike Schelly]

 The Cornell Dubilier DPPM20D1K from Mouser for 20M and if the "coupling"
cap is bad replace with the CDV16FF241J03...240pf, this CDV16 series is RF
rated! Also at Mouser.

Mike K4EAR

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Dave Hachadorian
Sent: Tuesday, July 22, 2008 3:55 PM
To: Towertalk Reflector; ck2jones at yahoo.com
Subject: Re: [TowerTalk] ICE-419a Bandpass filter

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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