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
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