The ICE419 now on Array Solutions website looks substantially different than
the unit seen in Jim’s comparison. Anyone know if it’s any better?
73, kelly, ve4xt
Sent from my iPhone
> On Apr 27, 2019, at 20:46, Grant Saviers <grants2@pacbell.net> wrote:
>
> The OMpower OM6BPF looks like an excellent copy of my 5B4AGN filter sets, or
> perhaps it was licensed to them. Array solutions is selling them
> https://www.arraysolutions.com/filters/om6bpf
>
> One difference in the implementations visible in the photo is what appears to
> be SMD multi layer ceramic caps (MLCCs) paralleled either for current or to
> achieve a specific capacitance. The ones Bob 5B4AGN sourced in the UK are
> precision (1%?) silver mica, exact values for each filter section.
> Otherwise, they appear identical. The "right" MLCC might be ok, but there
> are risks vs silver mica. Here is what Kemet has to say
> https://ec.kemet.com/mlcc-dielectric-differences
>
> Now and then there are unbuilt 5B4AGN filter sets advertised. Be prepared
> for some sore fingers from winding the inductors. Having a VNA is essential
> for tuning and from my experience it is always a good idea to verify that
> commercial filters have been properly tuned as it is time consuming and
> tricky to get each inductor to the best value.
>
> Grant KZ1W
>
>> On 4/27/2019 5:40 AM, Martin Sole wrote:
>> 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
>>>>
>>>> _______________________________________________
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> TowerTalk mailing list
>>>> TowerTalk@contesting.com
>>>> http://lists.contesting.com/mailman/listinfo/towertalk
>>>>
>>>> _______________________________________________
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> TowerTalk mailing list
>>>> TowerTalk@contesting.com
>>>> http://lists.contesting.com/mailman/listinfo/towertalk
>>>>
>>> _______________________________________________
>>>
>>>
>>>
>>> _______________________________________________
>>> TowerTalk mailing list
>>> TowerTalk@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/towertalk
>>>
>>> _______________________________________________
>>>
>>>
>>>
>>> _______________________________________________
>>> TowerTalk mailing list
>>> TowerTalk@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/towertalk
>> _______________________________________________
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|