As I said weeks earlier in this thread..my Par BCB filter works great.
My BCB attenuation measurements are per his specs on my swept SA. The BC
band falls off a cliff below 1800. Is it perfect? Of course not. Its a
LC filter. Like Bill says, you have special needs? Call Dale.
73 Art
Bill Tippett wrote:
> On Wed, Oct 14, 2009 at 2:47 PM, Rick Karlquist <richard@karlquist.com>wrote:
>
>
>> Bill Tippett wrote:
>>
>>> VE9AA:
>>>
>>>
>>>> Consider a Par Electronics BCB filter, IMHO much better than
>>>>
>>> the ICE 402:
>>>
>>> http://parelectronics.com/bcst-hpf.htm
>>>
>>>
>> This has the same problem as the ICE filter. An impressive
>> looking measured curve, but no guaranteed specs. Having built
>> many filters, I can tell you that repeatability is a huge
>> issue in the case of a 160 BCB filter, now that you have to
>> reject 1700 (I have a local station there :-(. You can always
>> tweak one by hand tuning to look very good. How do I know
>> the one I purchase is going to look so good?
>>
>>
>
> Contact the owner Dale Parfitt W4OP. Dale can tweak the #3 null in the
> response shown to exactly reject 1700 kHz. Poke around on his website...it
> might give you a little more confidence he knows what he's doing. I believe
> he's very QRL with military contracts at the moment but he's generally
> responsive to emails.
>
> 73, Bill W4ZV
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