Topband: High pass Filters

George & Marijke Guerin gmguerin at voyager.net
Sun Nov 28 22:05:54 EST 2004


Yes, Page 30-22 is correct.

Sorry for the typo

K8GG

----- Original Message ----- 
From: "John Bohnovic" <bohnovic at bellsouth.net>
To: "George & Marijke Guerin" <gmguerin at voyager.net>; "Barry N1EU" 
<n1eu at hotmail.com>; <topband at contesting.com>
Sent: Sunday, November 28, 2004 8:51 PM
Subject: Re: Topband: High pass Filters


> Make that page 30-22 as there is no filter on 30-32.
>
> 73..de John/K4WJ
>
>
> At 08:32 AM 11/28/04, George & Marijke Guerin wrote:
>>Hi All,
>>
>>My best Hi-pass filter came from an article in the ARRL Handbook - 1985 
>>page 30-32,
>>
>>The series resonance can be adjusted to help null nearby stations in 
>>various parts of the BC band.
>>
>>73        George        K8GG
>>
>>
>>----- Original Message ----- From: "Barry N1EU" <n1eu at hotmail.com>
>>To: <topband at contesting.com>
>>Sent: Saturday, November 27, 2004 7:27 PM
>>Subject: Re: Topband: High pass Filters
>>
>>
>>>
>>>>From: "Michael Tope" <W4EF at dellroy.com>
>>>
>>>>
>>>> > ICE (in Indianapolis) makes decent high pass filters with a cutoff 
>>>> > just
>>>>below 1.8
>>>> > MHz.
>>>
>>>>
>>>>One caveat is that this filter has limited rejection (only 10
>>>>to 15dB) at the high end of the BC band:
>>>
>>>That was indeed my experience and the Dunestar filter did a better job at 
>>>the BCB high end.
>>>
>>>73,
>>>Barry N1EU
>>>
>>>
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>>
>>
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>
> 73 de
> []
> John
>
> ----------
>
> John/K4WJ in Pembroke Pines, FL
> <mailto:k4wj at bellsouth.net>k4wj at bellsouth.net
>
>    QTH  26 00 51 N
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>
> K8PXG from 18 Jun 59 to 11 Feb 97
> K8WJ  from 12 Feb 97 to 07 Apr 97
> ZF2HZ from 17 May 84 to 31 Dec 84
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