Topband: Question on active vertical spacing

[James Cizek]

Thank you very much for the info!

73
James
KI0KN

On Fri, Aug 6, 2021 at 8:18 AM Tim Duffy <k3lr at k3lr.com> wrote:

> Hello James:
>
> Responding on behalf of DX Engineering. I do not see your email in the que.
>
> You can separate the antennas 1/4 wavelength for 160 and the operation will
> also be OK on 80 meters.
>
> You need the larger spacing so that the NCC-2 will work on 160.
>
> If you have questions, please refer them directly to me.
>
> VY 73
> Tim K3LR
> CEO DX Engineering
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces+k3lr=k3lr.com at contesting.com] On
> Behalf Of James Cizek
> Sent: Friday, August 6, 2021 8:38 AM
> To: topband at contesting.com
> Subject: Topband: Question on active vertical spacing
>
> Hello all,
>
> It was a slow start for me to get on 160 Meters, but I finally was able to
> make that happen and last season was my first full season on the band.  A
> lot of construction has happened in the nearby vicinity with new homes and
> I've started to experience certain point noise sources at times.  Earlier
> this spring, I was totally unable to work a station because of the local
> noise source sitting right on top.
>
> I usually use a SAL-30 for receiving and am very happy with it.  Because of
> this occasional noise source, I've opted to add an additional RX system
> this year.  I recently acquired a DXEngineering NCC-2 and the DXE-ARAV4-2P
> active vertical antenna set in hopes of nulling out the local point source
> when needed.
>
> In the manual for the NCC-2, they state that the RX antennas should be 1/4
> wave apart for optimum performance.  I'd like to use this setup on both 80
> and 160, so I was wondering if it would be better to place them 1/4 wave at
> 160 apart or 1/4 wave at 80meters apart.  The instructions also state
> reduced performance with too great or too little spacing, so I am curious
> of opinions on optimal spacing for a compromise to use both bands.
>
> I wrote DXengineering tech support but they never responded, so thought I'd
> try the mind-trust here :)
>
> Thanks for any input.
> 73
> James
> KI0KN
> ps- I am only at 44 entities on 160M so I'll be as active as the band lets
> me be this fall/winter!
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