Jim's review,
http://k9yc.com/BandpassFilterSurvey.pdf
Is pretty much the seminal work on switched bandpass filter selection. Well
worth the read.
Unfortunately I think the super 5B4AGN filters are no longer available, unless
they are now sold by a commercial outfit perhaps?
Martin, HS0ZED
On 27/04/2019 19:37, Keith Dutson wrote:
Bottom of the barrel? What did you replace then with?
I have four of these filters, and take them on DXpeditions. Each has had a
failure (mostly on 10 meters) due to operator error switching bands without
switching the filter. Since then I use the WX0B Bandmaster to switch the
filters automatically with the radio.
After repairing each one, I found a set of caps that will handle the 200
watts used with my Kenwood 480HX. Only have had two relays fail out of all
four units. Wish I had a permanent fix for those. Actually, I would
replace all of these if I could find a reliable unit for similar cost.
73, Keith NM5G
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Jim Brown
Sent: Friday, April 26, 2019 1:04 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] ICE 419-B info.
The ICE 419-series BPF sets are the bottom of the barrel. They don't handle
power or SWR, so they're very easy to blow, which requires difficult
disassembly and realignment. And when you do all that, you still have a
lousy filter set. And if that isn't enough, the relays also go intermittent,
also require that disassembly.
My measurements of BPF filter sets used within NCCC were published in NCJ
about four years ago. The review is on my website.
http://k9yc.com/BandpassFilterSurvey.pdf
The report is based on measured data using a VNWA3e Vector Network Analyzer,
and plots of the data for each filter can be accessed for each unit on each
band from this webpage.
http://audiosystemsgroup.com/BandpassFilterData.htm
My advice is that if you have a problem with the ICE filter set, bite the
bullet and replace it. The two I owned are long gone.
73, Jim K9YC
On 4/26/2019 9:14 AM, Jon Zaimes via TowerTalk wrote:
Wayne,
This Green Heron datasheet has the Ice 419 pinout:
https://www.greenheronengineering.com/prod_documents/ghEveryware/app_n
otes/I
CE_419_BPF.pdf
73/Jon
Jon P. Zaimes, AA1K
Tower climber for hire
http://www.aa1k.us/
Cell: 302-632-2353
Reviews of AA1K tower work on eham website:
http://www.eham.net/reviews/detail/12922
Hug your favorite tower every day, and always stay connected to it.
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Wayne
Kline
Sent: Thursday, April 25, 2019 11:08 PM
To: towertalk@contesting.com
Subject: [TowerTalk] ICE 419-B info.
The 8 pin din on an ICE 419-B bandpass filter. Would anyone have a
manual the could scan me a PDF ?
Wayne W3EA
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
Windows
10
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