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From: "Alan Melia" <alan.melia@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
References: <c76.efa8d1e.335b9166@aol.com> <004d01c78c3a$48757ec0$0b01a8c0@server> <003501c78c4d$0d68f060$0300a8c0@lark> <006a01c78d17$440b3d60$0b01a8c0@server> <8C95BC9DABC7512-1190-E1D2@FWM-M30.sysops.aol.com> <009101c78dc0$c1836700$0b01a8c0@server> <8C95BF936ED4AEE-1BD8-EEA3@FWM-D26.sysops.aol.com> <00c401c78e8a$af4defe0$0b01a8c0@server>
Date: Fri, 4 May 2007 22:42:54 +0100
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Subject: Re: LF: Passive high-pass filter circuits?
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Hi JB what it is to have such a fund of expertise available on tap. I like
that idea, the simple solutions are always the best in my book....well done
JD....for asking the right question! My software management course (many
many years ago) insisted that all problems were caused by not getting the
full specification from the end-user ! and that that was by far the most
difficult part of the job. He knows what he has....you don't !

Cheers de Alan G3NYK

----- Original Message -----
From: J. B. Weazle McCreath <weazle@hurontel.on.ca>
To: <rsgb_lf_group@blacksheep.org>
Sent: 04 May 2007 21:27
Subject: Re: LF: Passive high-pass filter circuits?


> Hi John, LFers,
>
> Success!!  Since the primary and secondary windings of the
> repeater coils are actually two windings hooked in series, I
> removed the link on the line side and replaced it with a 0.1
> capacitor.  That reduced the input level in the 0 to 1kHz.
> range by better than 10 dB., while everything above that
> is still about the same level.  Now the mains hum and its
> first few harmonics ares well below the baseband level.
>
> 73, J.B., VE3EAR - VE3WZL
> Solar and wind powered
> Lowfer " EAR"  188.830
> EN93dr
>
> http://www.hurontel.on.ca/~weazle
>
>
>
>