Micro PA50 Harmonics Test 

Thank you. You got everything right in your presentation. Unlike some other channels where they neither know nor care about the accuracy of what they're saying, hams can actually learn from your channel. You're an Elmer.

Now repeat the test with the Hermes Lite and Adaptive Predistortion engaged.

These reviews are excellent, and will hopefully lead up to better products to purchase in the future, thank you!

Thanks for the primer. You always do informative work and I appreciate the reviews. Thanks for a good video.

According to the official guidance of TinySA, in order to ensure measurement accuracy, the final signal strength input to TinySA should be controlled below -15dB. Therefore, for measuring 50W power equipment, it is necessary to add at least a 62dB attenuator, otherwise the measurement uncertainty will be increased. .

With the new software, I have grown to really like mine, and will continue to use it. 30m does not have it's own specific filter, it shares with 40, according to the creator. That might explain the emissions on 30.

The amp should filter harmonics, but to be sure, you might check the radio output on the failing frequencies. The amp might be faithfully passing on what it was given.

Nice job Ape I was wondering how clean this amp would be.

Those attenuators look a lot like them shield generators I seen on Hoth, LOL. Thanks for another great test!

Thanks for the video!

Yes. That is a big ass attenuator.

I've been thinking of getting one, and as I only operate on 20 & 40 it looks fine. I wonder if it would be worth checking the pass bands of the filters using the nanovna to make sure that the filters are centred. I think I'll do that anyway. MY nanoVNA is meant to arrive today!

Some of these companies have just got to hate the ease at which the average consumer can check the quality of purchased equipment.

Back in my day. Lol.... consumers didnt have no fancy pants equipment like that and we survived the spurs!😂👍

What is the upper safe power limit for the Tiny SA? In other words how do you know how much attenuation is needed to knock it down so that the Tiny SA won't get fried?

Good primer for Cafe Noir tonight!

Hi Ape, Don't know if my math is wrong, but the 3rd harmonic of 14MHz is 42MHz. All the 3rd harmonics being shown are the 2nd harmonics, unless I'm missing something. 73 WJ3U

Anyone know what chord is used for the ACC port to connect to the Xiegu g90?

Mine is coming in here in a few days 🙃

Did you check the 705 for harmonics before starting this test?

very nice documentation of measurements.. but, what if a atu is put on the output of the pa ?,, a simple Phi-atu mfj-900 or similar... vy73 de oz1fjb - ou2v

Are the HF specs still the same as the VHF specs? I haven't looked

What is the firmware version? I have the Micro PA50 and just got all the stuff to do an update, USB to TTL and six wire cable. Thanks.

Is it possible that a different unit would perform better?

Does that Amplifier have band pass filters? Maybe its not designed for use on 30 Meters.

They said the PA50+ has improved numbers.

looks like to use it on 30 meters you will need a band pass filter. only a 50 watt amp. them small band pass filters will work or just wind your own. for the 10 meter band the harmonics are over 35 MHZ so a low pass filter with a cut off around 35 MHZ will work great. RM Italy as one as well as Comet and MFJ . pass 1.8 to 30 MHZ. it is important to check each band. I am testing a RM Italy KL 805 /24V/ 600 watt amp and it is shocking clean . I am using a Byrd line section as a tap off a 2.5KW dummy load. what you have to do for high power levels. you are working HF them extra coax and connectors is not a problem. when I test a RF amp I go threw all the factors. I use scope to look at wave form . look at input SWR . out put power and harmonics and scope for distortion . also the input voltage and amps .also the heat made from the amp. ICOM is very clean. I have tested the 705 and 7300 and my old 735. the 705 is not mine . belongs to oner of amp. just testing and setting up for him. love how you took the time to go threw the bands. what are real clean is tube amps with a PI output tune. I still test. a leaky or off value cap in the out put section can throw off harmonics . 73's

I need to get one of those big a$$ attenuators! Man, do any of these manufacturers actually test their products for spurious emissions?

They did that Amp dirty.

My Rigol SA would be fun to redo this test on.

👍

Maybe worth noting that the TinySA (I assume) is not calibrated. So, this is an indication of harmonic levels (especially on the marginal results??). Maybe some low pass filters on the output would bring it in line on the higher frequencies?

What? You don't want to share medical issues on 80? Thanks for the review.

So you have yourself a big a$$ and a little a$$ attenuators and a tiny a$$ spectrum analyzer, sure is a whole lotta a$$🏋‍♀ I just received a micro pa50+, I must check it out with my similar a$$'s. Love the channel and remember what I said smoke what you roll and toss the vaporizer! 🚭