[RFI] Flag Pennant loop - Tiny SA use

[David Eckhardt]

Don't forget the average 'lab' SA has a typical noise figure around 18 to
22 dB.  All need a preamp for reasonable sensitivity.  Many of the lab
instruments today are being marketed with a built-in preamp for this
reason.  Also, note the dynamic range is degraded by the gain of the
preamp.  It's generally best to have it present but easily bypassable for
that reason.

Dave - WØLEV

On Mon, Apr 12, 2021 at 8:35 PM Lee STRAHAN <k7tjr at msn.com> wrote:

> Hi Dave and group,
>    I find the Tiny SA a little low on sensitivity so I am planning on
> adding an external 20 dB preamp with an easier to use step attenuator for
> RFI hunting.
> I have some other obligations at the moment so I am temporarily using an
> SI 4732 radio which is also a tiny box with AM.
>  I have the local power company and a wood products manufacturing company
> working with me on an interesting conducted interference case I will
> eventually report on here later after  more tests.
> Lee   K7TJR   OR
>
> -----Original Message-----
> From: RFI <rfi-bounces+k7tjr=msn.com at contesting.com> On Behalf Of Dave
> Cole
> Sent: Monday, April 12, 2021 1:00 PM
> To: rfi at contesting.com
> Subject: Re: [RFI] Flag Pennant loop - added benefit of being broadband
>
> BTW:
>
> I am currently working on setting up a tinySA on the FLAG...  Try it, it
> is really portable.  The tinySA will mount right on the support pole for
> the FLAG.  No computer, no SDR, just a box the size of a pack of smokes...
>
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
>
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>


-- 
*Dave - WØLEV*
*Just Let Darwin Work*