TVI Tips

[W8JITom at aol.com]

Hi Lee,
In a message dated 96-04-23 10:17:36 EDT, you write:
>
>A good source for good High Pass filters?  Where do you find ferrite cores
>these days?  Any help would be appreciated.  TU
>
>Lee Buller, K0WA
>k0wa at southwind.net

I can tell you a **poor source** for TVI filters, Tucker electronics.

The Tucker low-pass filter my friend bought was in a pretty looking, heavy
case. But the case had paint on the cover mounting edges and insulating
washers under the cover screws. It had long wire lead conventional disk
capacitors and toroids as the filter element. The construction was
unthinkably POOR for a VHF-UHF filter. 

It had severe case radiation, and poor VHF-UHF attenuation. It actually
CAUSED TVI in my friend's installation!   

We replaced it with a jumper and TVI was reduced, we added an old Bencher and
the TVI went away! 

73 Tom

>From wx0b at gte.net (Jay Terleski)  Tue Apr 23 17:30:17 1996
From: wx0b at gte.net (Jay Terleski) (Jay Terleski)
Date: Tue, 23 Apr 1996 10:30:17 -0600
Subject: Contesters design tool-or something interesting on a plane the other day
Message-ID: <v01530502ada2b2d91504@[206.124.69.83]>


I made a mistake in my previouse message in that the attitude of the
message contained verbage that seemed to infere that the ARRL is
overcharging for this software or that I meant some harm to the ARRL.

I wish to appologize to the ARRL and to anyone else who mistook my meaning
in my comments.  I have no idea if the ARRL or P-spice has comparable
features or if the ARRL has features that far exceed PSPICE.  I do know
that Documentation is expensive and time consuming so if the ARRL has
complete Docs, it actually may be a better value.

Thanks for Tom K1KI for pointing my error out to me.

Jay