[TenTec] Low Pass Filter

[DAVID HELLER]

Radiation from a feedline or from the antenna proper is radiaton, which is 
what a transmitter is supposed to be doing for a living.  A good match is 
just supposed to increase the amount of transmitter output that actually 
gets where it can radiate;  that which simply heats something along the way 
is just wasted.  As for the RFI possibility I refer to the ARRL RFI book, 
and especially the article by me therein.  The test:  If there is one TV set 
(assuming it's TVI in question) in your home or the immediate vicinity that 
your station does NOT bother your rig is clean and anything you do to it 
will produce no improvement.   The affected receivers are defective,most 
likely needing high pass filtering.
Telephones and other devices that are either not supposed to be receivers or 
at worst  VHF or UHF devices should know better than to listen to HF.
One rule our Bucks Interference Committee,which I headed for many years, 
strictly enforced, was that we of  the committee would never touch a 
complainant's device - TV or whatever, and we were emphatic in advising the 
involved amateurs to keep hands off, and generally keep clear and let the 
Committee do the dirty work.
One of the worst sources of  true RFI was the ubiqitous C,B, ,often assisted 
by the nonlinear amplifiers common to the breed.  We stayed clear since our 
services were free and FCC had the opportunity to make money off them. 
Always amazing how 5 watts could raise so much problems while 100 watts or 
even a KW would bother no one.----- Original Message ----- 
From: "Jim WA9YSD" <wa9ysd at yahoo.com>
To: <tentec at contesting.com>
Sent: Saturday, May 17, 2008 2:38 PM
Subject: [TenTec] Low Pass Filter


> Oak Bay use to make a pretty good one.  Not sure if they still are making 
> them.  I have tried others with various affects.  Oak Bay seamed to be 
> most effective.  .I feel there are other issues to deal with first.  I no 
> longer use them except for the internal low pass filters installed in my 
> Ten-Tec radio equipment.
>
>
> Keep The Faith, Jim K9TF/WA9YSD
>
>
>
>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec