[TowerTalk] ICE 419-B info.

[Martin Sole]

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 at contesting.com> On Behalf Of Jim Brown
> Sent: Friday, April 26, 2019 1:04 PM
> To: towertalk at 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 at contesting.com> On Behalf Of Wayne
>> Kline
>> Sent: Thursday, April 25, 2019 11:08 PM
>> To: towertalk at 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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