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 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 <d...@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 > > 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 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-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> > On Behalf Of Dave > > Sent: Wednesday, June 9, 2021 23:01 > > To: elecraft@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 > > 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 > >>> ARRL Volunteer Examiner > >>> ARRL Technical Specialist, RFI > >>> ARRL Asst. Director, NW Division, Technical Resources > >> ______________________________________________________________ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto:Elecraft@mailman.qth.net > >> > >> This list hosted by: http://www.qsl.net > >> Please help support this email list: http://www.qsl.net/donate.html > >> Message delivered to d...@nk7z.net > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to hamsh...@n4st.com > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to dean.k...@gmail.com > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
