My honest review of these TWO Soldering Irons (re-upload)

On the bench the 𝗞𝗔𝗜𝗪𝗘𝗘𝗧𝗦 𝗞𝗘𝗧𝗦𝟬𝟮 and 𝗦𝗘𝗤𝗨𝗥𝗘 𝗦𝟵𝟵 𝗨𝗦𝗕 soldering irons.

This is a re-upload as in the original version I didn't realise the SEQURE can actually be grounded. Thanks for the viewer who pointed out my mistake. Apologies for not realising that in the first place!

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My Aixun T3A review videos:

00:00 Overview
01:00 Kaiweets
04:52 FW update
05:29 Temperature accuracy
08:01 Sequre
11:00 FW update
12:18 Temperature accuracy
12:39 Power reading Sequre
14:33 150W!!
17:28 Power reading Kaiweets
20:20 Coin test
21:56 Ground and leakage test Sequre
29:13 Ground and leakage test Kaiweets
30:45 Grounding solution?
32:16 Sequre Bulletin
35:33 Final considerations
39:10 Outro

[tony]

I found evidence online that the "directionality" of USB-C cables behaviour is intended with USB tester. What I found is this:
"It's due to one CC line changing roles to VCONN. If you 'flip' it in the middle with the tester, PD negotiation won't work. The device end shouldn't matter, assuming the devices implement USB-C properly."

I think it makes sense, the USB-C pinout is not identical on each side, but it's designed to be plugged both ways. The protocol configures the lines according to HOW the cable is plugged. If you swap the cable AFTER the USB tester, well the cable stops working. Very interesting!
I'm also reading that cables have an "e-marker" in them to tell the power supply/computer how much power they're able to sustain so the wrong cable - or worst, a passive one - will affect the max power. A passive cable in particular is limited to 3A (63W at 21V).

What COULD be happen is that a cable rated - say - 100W is used between the PSU and the USB tester and a cable rated 60W is used between the tester and the device. The power supply would output 100W and the 60W cable might get damaged. I didn't smoke those cables in my tests but I should have probably be more careful. The tester has a function to "read" the e-marker and display the maximum power they're rated for.

When NOT using a USB-tester, the system should be bullet-proof as it will self-limit itself based on the e-marker.

Super-interesting!

[horusfalcon]

Thanks for re-uploading this. As you explained the first go-round, folks can make mistakes - it's permitted. What's important is what you do when you find a mistake. Well done!

[NickyNiclas]

In my mind, anything that doesn't support the JBC tips is a no-go. The original JBC tips are not **that** expensive all things considered and they last a really long time. I'd be happy to learn about something better but so far I haven't found it. Also for power supplies, a lot of them support a peak power that is higher than the rating for continuous loads. Great video, thanks!

[lmwlmw]

Damn, these days even a soldering Iron needs to get Good video.

[JamesPotts]

These videos are fantastic! I chose my current hakko knockoff purely based on the "creepage" and "clearance" of the pictures of the power supply. (With a big thanks to Big Clive's channel for tearing down cheap DC supplies.)

[ivolol]

Surprised you didn't use the headline feature of your Fluke 117 - the LoZ voltage option! It will tell you if the "phantom floating" 100V is capable of supplying any dangerous power or if it drops away as soon as there is a medium load.

[alanturing]

Interesting comparison! Perfect timing for me because I am looking to replace my setup!

[orionRS]

31:23 - Fnirsi/kaiweets have screwing part for heating element, screw O ring terminal with earth wire there. T12 tips can be used also on Fnirsi, but I had to make aluminum part of 42mm to screw it on device. Now I have all range of tips.

[jeremywh]

Regarding the speaker noise... if for example the current was 0.0004 A (which would still read 0.000A on the meter), at 100V you have 0.04W, which jives with how quiet you indicated it was; plus the ~90V floating iron was quieter. :-) Sequre's mod recommendation and gift is commendable, but I feel like they should provide the capacitor as well, especially if they're already offering to send a free tip! But thanks for these reviews! I've been needing to get a (pseudo-)portable iron... :-)

[deterdamel]

Nice review. The tips on the Kaiweets should be HS01. T85, T65 should match too. Seems that the HS01-, T85-, T65-tips from Aliexpress are always of good quality. A HS01 iron like the 'Quecco T85' can be a very good solution for 20-25€. It even takes TS100/101- tips, has a grounding-point and have a silicon cable.

[omfgbunder]

For what its worth, my weller can also light up LEDs while I'm soldering them.😅

[greywizard]

Those tips for the KETS02 look an awful lot like the tips usedby the TS100/TS101. I wonder if they are interchangeable.

[jonathanwhiteside]

I have a Miniware TS-101 type iron and I found that it also had about 90v AC on the tip, however I did read the manual and it does have an earthing point and with that in use, I see maybe a few mV AC, so quite a difference, so definitely a consideration when purchasing this type of iron. Very interesting video for sure.

[RZ-zvjr]

With your speaker you have build a simple radio.
Remember the coil?
The solder iron is your antenna.
You hear the 50/60Hz humm.
And you hear the radio noise the iron makes.

[malanvogt]

I was just watching the original upload. This should be interesting youre excellent at testing irons.

[itguru]

Thank You very much for Your interesting review

[flippedout]

Since these failed - I would really be interested in what you think about the Aixun T380 ‘portable’ unit??

I know you found serious faults with the T4A - what about the T380??

[domantlen]

So have you found any usb soldering iron or similarly small soldering station which is worth recommending? I mean S99 looks nice but i already soldered some 0402 components and REALLY would like to avoid it as much as possible :)

[HomoSapiensMember]

what happens to either iron if you forget to install the tip

[NicksStuff]

3:10 It's very badly worded but I'm fairly confident each USB-C can deliver 65 W. If you use both at the same time, that's 45 W on the first and 20 W on the second