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Re: [IRCA] Super KAZ update

The D-KAZ has a considerably wider back null than the basic single loop KAZ
antenna. For example, with your null at 330 with the D-KAZ you probably
also have good nulls at 300 and 360. These nulls will be better at off
angles than what you'd get using a KAZ as the single loop has a more narrow
null aperture.

As an example here in IL. Milwaukee is about due north of me and Madison is
NW. Madison is still well nulled by my south D-KAZ even though it is aimed
due south. This was not the case when using a single KAZ.

Another example of D-KAZ null aperture and also beam width can be found on
950 here at night. WNTD is 31.8 miles from me at 133.4 deg. ie SE. A D-KAZ
aimed due west nulls it well enough to make Denver the dominant at night
unless cx are significantly non AU and CFAM QRMs.

As for null steering with the Vactrol, what you are really doing is
adjusting the termination resistance (Rt) for deepest back null. If you
mistune by a decent amount you may able to increase side nulls or off beam
nulls by a couple of dB but at the expense of significant loss of back null
depth.

Hmm... I didn't realize that you couldn't fine tune the SAL-30 nulls.

73 KAZ

On Wed, Mar 16, 2016 at 5:26 PM, Brandon Jordan <swl.tn.usa@xxxxxxxxx>
wrote:

> Hi folks. Due to work schedule I didn't get a chance to change the D-KAZ
> beam. Hopefully this evening...
>
> I did spend another hour with the Wellbrook D-KAZ/Vactrol (330 null) vs the
> SAL-30 last night. Nulling stations to the NW with them was a toss-up, on
> some nulls the D-KAZ won, on others the SAL-30. IMO, that is awesome. The
> SAL-30 is an expensive antenna, and offers 8 directional beams with
> excellent f/b. The down-side is that the nulls cannot be fine-tuned... but
> 8 beams rock :)
>
> I am really interested in setting up the D-KAZ at 45/225, that will allow
> me to compare nulls on the big guns to the NE.
>
> I do have a questions if Neil is reading. Would a Super KAZ offer wider
> null-steering vs the D-KAZ?
>
> --
> 73,
> Brandon Jordan, KM4PBQ
> Fayette County, TN EM55gc
> http://www.swldx.us
>
> WinRadio G33DDC G313-e | RFSpace SDR-IQ NetSDR | Elad FDM-S2 | Icom IC-7200
> Array Solutions SAL-30 Shared Apex Loop
> Clifton Labs Z1501F Active Whip
> DX Engineering NCC-1 Phased ARAV3 Active Whips
> Wellbrook ALA100HG Loop
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