[CQ-Contest] Re: High Pass Filter (For Broadcast Band)

[Tom Delker]

Roderick M. Fitz-Randolph wrote:
> 
> Hi.  I'm looking for a good (Excellent, really!) high pass filter
> that I can use between the linear and the FT-1000MP that will allow
> considerable (Lots, really) of attenuation of the very strong
> broadcast stations that are simply overpowering my front end.  The
> lower cutoff frequency must be below 1.8 MHz so that I can use it on
> the 160 meter band as well as the higher bands.
> 
> My emphasis is more on quality than price.  Although price is also a
> consideration, it is subservient to its ability to cut out the BC
> interference.
> 
> I am already using series tuned trap on one of the strongest but the
> others are booming through and I must put in up to 12 dB attenuation
> to lower the others to an acceptable (not good - just acceptable) level.
> 
> Any responses will be appreciated.
> 
> Rod, N5HV
> w5hvv at aeneas.net

Rod,

I am using the ICE Broadcast filters between my radios and amps (300w
versions) and the low power versions in front of my beverages.  They
make two versions of each -- a 1.8Mhz cutoff and a 3.5mhz cutoff.

These are quality boxes, pricing around $28-38.  Losses are minimal and
the attenuation is excellent.  I have a 5kw 101khz broadcast station
down the road that was causing all sorts of problems during the daytime,
and since I added the filters -- nada, nil, no-problemo!

Hope this helps.

If you need the ICE phone number, I believe you can look at the archives
in Topband reflector as we have kicked this around recently.

73,

-- 
Thomas M. Delker - K1KY CFO#395 - Smyrna / Gallatin / Short Mtn. TN
C.A.T.S. (W4CAT) - 147.30 (114.8) / 145.23 / 223.98 / 444.45 & 444.65
Stones River A.R.C. (K4FUN) - http://www.Voy.net/~rfi/stones.html
Tennessee Contest Group (K4TCG) - http://geo1.tdec.state.tn.us/tcg.html
Fistfighters United Nashville (NT4L) 146.955 (114.8)


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