[Elecraft] Gurus
Dave
dave at nk7z.net
Thu Jun 10 14:37:45 EDT 2021
Who said it was a trustworthy device? I did not indicate you should
trust it, I indicated it has use as an indicator of possible problems...
You are responding to perhaps someone else?
Here is the quote from my post:
>Here is an interesting video showing both the strengths, and
weaknesses >of the tinySA. A compare of the tinySA to an HP 8921A SA:
>https://www.youtube.com/watch?v=xFtF2AYT0iQ
>
>For the price, and if one is careful, and aware of how to use the
<tinySA, you can gain a lot of knowledge for around 100 bucks.
>
>I am half tempted to buy one, and add a tap to my output coax, add
>power, bring it to a very low input level, and just keep the tinySA on
>all the time I operate, as an alarm that I might have an issue.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 6/10/21 10:58 AM, Dean L wrote:
> After watching the video of the TinySA next to the HP8921, I can't see
> how you could EVER trust the results of the toy.
> I watched as OM in the video was scratching his head wondering where the
> artifacts on the display of the TinySA came from.
> Did I watch the wrong video? If I didn't see the image captured by the
> HP, I would have comd to different conclusions.
>
>
>
>
> I was not impressed:
> Same author different video,
>
> https://youtu.be/uwXUZSdxNq4 <https://youtu.be/uwXUZSdxNq4>
>
> As he changed the amplitude the harmonics generated by the TinySA
> changed accordingly making the signal look "dirty"
> Great tool if you have a $10k Service monitor sitting right next to it...
>
> I understand it's $100 gizmo, but might confuse an unsuspecting operator.
>
>
> I would not fault my kilobuck HF rig with this unit
> YMMV
>
> 73
> Dean K2WW
>
> On Thu, Jun 10, 2021, 10:23 Dave <dave at nk7z.net <mailto:dave at nk7z.net>>
> wrote:
>
> Interestingly enough I don't see that issue here with my K3, and
> tinySA.
> I also don't use the built in antenna. I use a tap and attenuator
> combination.
>
> I am also using a non clone device, as opposed to a clone device. Some
> clones don't have the internal shielding.
>
> Here is a compare to a clone vs a non clone:
> https://www.youtube.com/watch?v=I5IzLAGgKg0
> <https://www.youtube.com/watch?v=I5IzLAGgKg0>
>
> Here is an interesting video showing both the strengths, and weaknesses
> of the tinySA. A compare of the tinySA to an HP 8921A SA:
> https://www.youtube.com/watch?v=xFtF2AYT0iQ
> <https://www.youtube.com/watch?v=xFtF2AYT0iQ>
>
> For the price, and if one is careful, and aware of how to use the
> tinySA, you can gain a lot of knowledge for around 100 bucks.
>
> I am half tempted to buy one, and add a tap to my output coax, add
> power, bring it to a very low input level, and just keep the tinySA on
> all the time I operate, as an alarm that I might have an issue.
>
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net <https://www.nk7z.net>
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
>
> On 6/10/21 6:45 AM, N4ST - Jim wrote:
> > FWIW, be careful with your measurement process.
> > I got very depressed when I saw that my K3S had harmonics only
> 20db down on most bands when measured by Tiny SA and its telescoping
> antenna.
> > It was not being overloaded and in fact I measured similar
> results when feeding a dummy load.
> > Then I went outside the shack at a distance from the antennas and
> found that the harmonics were 40dB down or better.
> > Evidently when measuring inside the shack I was getting RF
> leakage directly through the front panel of the rig. (?).
> >
> > _______________
> > 73,
> > Jim - N4ST
> >
> > -----Original Message-----
> > From: elecraft-bounces at mailman.qth.net
> <mailto:elecraft-bounces at mailman.qth.net>
> <elecraft-bounces at mailman.qth.net
> <mailto:elecraft-bounces at mailman.qth.net>> On Behalf Of Dave
> > Sent: Wednesday, June 9, 2021 23:01
> > To: elecraft at mailman.qth.net <mailto:elecraft at mailman.qth.net>
> > Subject: Re: [Elecraft] Gurus
> >
> > Actually for this use they are... Someone did a compare of the
> tinySA
> > to an HP, and it was within a few dB as long as it was
> overdriven. We
> > are looking for splatter or harmonics, not doing a proof of
> performance.
> >
> > 73, and thanks,
> > Dave (NK7Z)
> > https://www.nk7z.net <https://www.nk7z.net>
> > ARRL Volunteer Examiner
> > ARRL Technical Specialist, RFI
> > ARRL Asst. Director, NW Division, Technical Resources
> >
> > On 6/9/21 7:10 PM, Wes wrote:
> >> I'm not sure those toys are up to the task.
> >>
> >> On 6/9/2021 5:30 PM, Dave wrote:
> >>> Buy an attenuator, and a tinySA, or get an SDRPlay, and run the
> >>> Spectrum Analyzer software. Take a few SA shots, that will
> tell you
> >>> if it is him, or you.
> >>>
> >>> 73, and thanks,
> >>> Dave (NK7Z)
> >>> https://www.nk7z.net <https://www.nk7z.net>
> >>> ARRL Volunteer Examiner
> >>> ARRL Technical Specialist, RFI
> >>> ARRL Asst. Director, NW Division, Technical Resources
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