Tiny SA Ultra - HF Spectral Purity

In this episode of the Art of Engineering I examine the spectral purity of my HF rigs using the TINY SA Ultra ‪@TheArtofEngineering‬
73 de VK2AOE
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[@MidlifeRenaissanceMan]

In audio, they refer to the first overtone as an even harmonic as it’s one or more octaves above the fundamental.
So even harmonics sound musical as they have a 2:1 relationship of but odd harmonics are more complex in their ratios to the fundamental and sound more complex.
So carrying that over to radio, you would call the first overtone the second order harmonic as it’s twice the fundamental, third order harmonic being 3x the fundamental
So, to clarify, and minimise a fight on 80m nets, add the word order following the multiple that you are talking about

[@TheArtofEngineering]

Or on 80m discuss the pain in your prostate instead

[@MidlifeRenaissanceMan]

@@TheArtofEngineering or all the contact you made during the CW contest after mixing up your blood pressure medication, with your grandson’s ADD medication

[@DonzLockz]

​@@MidlifeRenaissanceMan😂😂😂

[@DonzLockz]

Cool, I thave tha SA on my wish list.
Mooncake fail... I'd take it back under warranty!😂
I need to catch up on your videos. Hermes Lite 2 FTW! ;)

[@TheArtofEngineering]

Too kind! We got the Mooncake clean in the end! The TINY SA is cool. Just worked NZ on 20m on the Hermes 2 as well…. Too many toys now😂😂 73 Don.

[@MidlifeRenaissanceMan]

When in doubt. Use a mag loop

[@TheArtofEngineering]

Yes.....a nice high Q one!

[@MidlifeRenaissanceMan]

@@TheArtofEngineering the only kind

[@Paul_VK3HN]

People forget that the antenna has resonance and Q, and it forms an integral part of the transmitting system. So does a high Q antenna improve the emitted spectral purity? It must! And, how could you measure this?

[@TheArtofEngineering]

I think this is why we have to have clean signal up the spout?? :) I'm presently building a QCX plus for 160m as I have never done top band....the Hermes seems to have persistent ADC overload on that band so hopefully Hans Somers will come to the rescue?? hi hi What have you got on the bench Paul atm 73 de vk2aoe@@Paul_VK3HN

[@Paul_VK3HN]

@@TheArtofEngineering QCX for 160? There's not much CW down there! 80 would at least give you a fighting chance of a QSO.
Meanwhile I've moved QTH and have had a shack pack up. So just the odd portable outing for me at the moment.