I have a 2KW ERP station at 1480KHz 1.5 mi north of me and a 20KW ERP at 1300
KHz south of me . With that combination my MFJ-259B is TOTALLY useless on 160.
I bought the $100 MFJ-731 filter and the 259B was then "almost" TOTALLY
useless. Wrapping a $100 bill around my vertical's base loading would have had
the same effect. The MFJ filter is now good at attracting dust on the shelf for
the last 5 years. Now using the LP-100 which works fine.
Russ, N3CO
________________________________
From: ZR <zr@jeremy.mv.com>
To: Tom Boucher <tom@telemetry.demon.co.uk>; 160 reflector
<topband@contesting.com>; Chris G3SVL <Chris@G3SVL.com>
Sent: Friday, November 2, 2012 8:11 PM
Subject: Re: Topband: Antenna analysers in close proximity to BC station.
MFJ sells a filter for that but I dont know how well it works around serious
BCB RF; 10KW at the high end of the band in 2 directions in about 7-8 miles
doesnt bother my unfiltered 259B nor do the FM and UHF TV sites about 2 miles
away.
Carl
KM1H
----- Original Message ----- From: "Chris G3SVL" <Chris@G3SVL.com>
To: "Tom Boucher" <tom@telemetry.demon.co.uk>; "160 reflector"
<topband@contesting.com>
Sent: Friday, November 02, 2012 6:42 PM
Subject: Re: Topband: Antenna analysers in close proximity to BC station.
> At 21:21 02/11/2012, Tom Boucher wrote:
>> ...... but how to use the antenna analyser in the presence of a high BC
>> station field. Anyone any ideas?
>
> Hi Tom,
>
> I have 2.4KW of MW BC transmitter 300m from the base of my 160m antenna, so I
> know the problem. I've found an ICE BC filter to be pretty good - but I've
> only ever used it to tweak a matching system, not to take absolute readings.
>
> I've used a loaned N8LP LP100A and that worked fine - but of course that's an
> entirely different measurement system.
>
> 73 Chris, G3SVL
> _______________________________________________
> Topband reflector - topband@contesting.com
>
>
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