[Lowfer] clifton labs antenna

[K2ORS]

Doug,
      I second your comments. I have the Clifton labs antenna and a DX 
Engineering active antenna and the Clifton labs antenna beats the pants off 
the DX Engineering one. Plus Jack is a prince amoung men!

73 Warren K2ORS
----- Original Message ----- 
From: "Douglas D. Williams" <kb4oer at gmail.com>
To: "Discussion of the Lowfer (US, European, &amp, UK) and MedFer bands" 
<lowfer at mailman.qth.net>
Sent: Saturday, July 02, 2011 9:09 AM
Subject: [Lowfer] clifton labs antenna


>I just wanted to let this group know how pleased I am with my new
> Clifton Labs Z1501 active antenna and Z1203 power coupler. I had a
> special request for Jack, the owner, that he move the lower -3db point
> of the antenna and coupler down below 9kHz (the stock unit has a -3db
> point of 20kHz, according to Jack). He was able to do this with flying
> colors! The -3db point is now around 3kHz. Also, he was able to do
> this without adversely affecting the Z1501's excellent intermodulation
> performance.
>
> As pleased as I am with the antenna, I am even more pleased with the
> coupler. For over a year now, I have had a terrible QRM noise from
> around 25kHz to 35+kHz (plus harmonics). When I installed the Z1501
> yesterday, I neglected to connect the Z1203's ground lug to my station
> ground. The VLF spectrum from 0-48kHz, as you can see, is very free of
> QRM and power line crud. At first, I thought the offending QRM had
> simply gone away. This morning I connected the ground lug of the Z1203
> to my station ground (8ft ground rod connected to a central hub with
> copper braid), and BAM, the crud and the offending QRM were back!
> Obviously the offending signals and powerline crud are being
> introduced via my station ground, and the Z1203 has some sort of
> provision for isolating the receiver (in this case my PC sound card).
> It is truly amazing at the difference, as you can see from the two
> screenshots.
>
> http://i81.photobucket.com/albums/j231/Goranothos/z1203grounded.jpg
>
> http://i81.photobucket.com/albums/j231/Goranothos/z1203ungrounded.jpg
>
>
> I would like to publicly thank Jack for working with me and being
> willing to modify one of his already excellent designs per my request.
> Also, thank you Steve Ratzlaff for referring me to Clifton Labs. I am
> very pleased.
>
> -Doug KB4OER
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