[TangerineSDR] [EXTERNAL] Re: TangerineSDR Digest, Vol 26, Issue 15

Bill Engelke bill.engelke at ua.edu
Tue May 25 17:12:17 EDT 2021


Ward - I can do that, just have to build a couple dipoles for those bands, I have the necessary rig...    - tnx es 73 - Bill   AB4EJ

From: TangerineSDR <tangerinesdr-bounces at lists.tapr.org> On Behalf Of Ward Silver via TangerineSDR
Sent: Tuesday, May 25, 2021 2:06 PM
To: TAPR TangerineSDR Modular Software Defined Radio <tangerinesdr at lists.tapr.org>
Cc: Ward Silver <hwardsil at gmail.com>
Subject: [EXTERNAL] Re: [TangerineSDR] TangerineSDR Digest, Vol 26, Issue 15

I suggest 2m and 70cm transmissions of 10-50 watts within 10 feet of the installation and with three-axis antenna orientation using a full-size dipole.  Cabling and internal conductors are electrically much longer at those frequencies and more likely to pick up significant energy.

73, Ward N0AX

On Tue, May 25, 2021 at 12:49 PM <tangerinesdr-request at lists.tapr.org<mailto:tangerinesdr-request at lists.tapr.org>> wrote:
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Today's Topics:

   1. Re: Testing magnetometer with nearby RF (Tom McDermott)


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Message: 1
Date: Tue, 25 May 2021 10:48:23 -0700
From: Tom McDermott <tom.n5eg at gmail.com<mailto:tom.n5eg at gmail.com>>
To: TAPR TangerineSDR Modular Software Defined Radio
        <tangerinesdr at lists.tapr.org<mailto:tangerinesdr at lists.tapr.org>>
Subject: Re: [TangerineSDR] Testing magnetometer with nearby RF
Message-ID:
        <CACO3nRR1exNE+2qZ2v_+m-6zzX4LTU4A9M-gvquvLHBeSArqwg at mail.gmail.com<mailto:CACO3nRR1exNE%2B2qZ2v_%2Bm-6zzX4LTU4A9M-gvquvLHBeSArqwg at mail.gmail.com>>
Content-Type: text/plain; charset="utf-8"

HI BIll - encouraging news from a susceptibility perspective !

The other concern would be noise radiated by the magnetometer, cabling, and
activity.
Do you have the capability to listen on HF to see if the magnetometer
causes noise when
you make readings?

-- Tom, N5EG

On Tue, May 25, 2021 at 9:02 AM Bill Engelke via TangerineSDR <
tangerinesdr at lists.tapr.org<mailto:tangerinesdr at lists.tapr.org>> wrote:

> I have a TAPR magnetometer in the ground (sitting at 24? deep).
>
>
>
> I have tested for RF exposure as follows:
>
>
>
> 80 M dipole, about 20? away and 15? elevation,  1500 W on 80M
>
> 30 M vertical, about 60? away  200W (legal limit) on 30M
>
> 40 M double bazooka about 50? away and at 30? elevation, 1500 W on 40M
>
> DX Engineering hexbeam, on 50? tower, base of which is 70? away, 1500 W on
> 20M, 17M, 15M, 12M, 10M
>
> 4-element 6 meter beam on 50? tower which is about 70? away, 500 W on 6 M
>
>
>
> There was no discernable effect on magnetometer readings from any of these
> tests, which were a carrier for 10 seconds at the noted power level.
>
>
>
> If anyone has ideas for additional tests, please advise; based on the
> above, my impression is that the current magnetometer should produce good
> results when in the yard of typical ham installation.
>
>
>
> -73-  Bill,   AB4EJ
>
>
>
> Magnetometer installation:
>
>
>
>
>
> --
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End of TangerineSDR Digest, Vol 26, Issue 15
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