Measall KC761A / KC761B / KC761C / KC761CN ( α/β/γ spectrometer ) - Page 1
Forum section: electronics / testgear

author: nikitasius
author_rank: Regular Contributor
timestamp: April 12, 2025, 06:42:51 pm
content: Hi folks, recently i ordered Measall KC761A from deepace website from herehttps://deepace.net/products/kc761-radiation-analyzer/I live in France and they have office in France so.. ordered 09 april, received 11 aprilThat's an Alpha/Beta/Gamma spectrometer. There are different models:KC761A & KC761B share same PCBKC761C & KC761CN share same PCB, CN version have neutron sensor as a bonusMain difference is the resolution % and PCB. I have 8% resolution for my device. It support BT, RJ45, have type-C & 3.5 jack, there are mobile app, but regarding the changelog they have issueshttps://deepace.net/products/kc761-handheld-energy-spectrometer-2/kc761_firmware_update/890-2/so new firmwares do not work well.Device came w/ FW 1.59, HW 1.2 & CFW 0.8. Also it use gamma crystal from KC761B device, good points, Guess it's like intel cpus - depends of crystal quality we have A-B-C-CN versions.Here is my 8% certificateI power it w/ 3xAA Eneloops 2000mAh. Device can charge it. It doesn't support PD so i use a simple 5V/1A charger from a wife's old iphoneIt works pretty nice, i removed the natural background at home (120k events, at least need 100k), did a walk w/ my dog, found am241 in natural background in my nuclear FranceSamsung Pro Endurance 32Gb works well. The only point that sucks is a microsd socket. Pain in the ass to remove the card..Mobile app is pretty basic controls are weird: to get isotope help you have to press the cursor and move itPretty good to search hot sourcesExtra infromations:KC761 - first version reviewKC761B vs KC761FCC photoshttps://fcc.report/FCC-ID/2BC3C-KC761User manual is on a support pagehttps://deepace.net/products/kc761-handheld-energy-spectrometer-2/kc761_firmware_update/890-2/Chinese forum, very handy, must read before buying (use a translater),https://www.kechuang.org/t/87897Feel free to speak w/ support they are very kind and answer your questions well.I wanted to flash to 1.77 but i won't do it cause: "3. Adjust the nuclide library, adding 152Eu, 54Mn and other sources, and deleting 223Ra, 252Cf, 227Ac and other low-frequency usage sources with complex peaks."I took mine 1.59 & compared w/ 1.7722Na 1.7724Na 1.77 & 1.5940K 1.77 & 1.5954Mn 1.7757Co 1.77 & 1.5960Co 1.77 & 1.5985Kr 1.77 & 1.5999Tcm 1.77 & 1.59125I 1.59131I 1.77 & 1.59133Ba 1.77 & 1.59137Cs 1.77 & 1.59147Pm 1.59152Eu 1.77176Lu 1.77 & 1.59192Ir 1.77 & 1.59201Tl 1.77 & 1.59210Po 1.59223Ra 1.59226Ra 1.77 & 1.59227Ac 1.59232Th 1.77 & 1.59233U 1.77 & 1.59235U 1.77 & 1.59238U 1.77 & 1.59239Pu 1.59241Am 1.77 & 1.59252Cf 1.59I hope we'll have Measall/Kechuang devs here cause i refuse to shrink isotope library on the device. I took this device cause i can use it w/o my laptop & smartphone. I wish to have as full library as possible. Also it doesn't take lot of place. Ik there are huge 400+ page pdf w/ isotopes (i have it too), but for 90% of my usage i prefer to do all on the device.Btw, UI is good & geekyI made a topic for who KC761x serie. Old version KC761 [no letter] is discontinued. I have Fnirsi GC-01 on J321 & CH32 which i flashed via st-link v2 on a radpro but that Measall device is totally different level, speed, features, autonomy & precision.

author: nikitasius
author_rank: Regular Contributor
timestamp: April 12, 2025, 07:03:33 pm
content: Firmware mirrorhttps://drive.google.com/drive/folders/1vhRX4gZW1oUMxNURy2nmRAyy3EY5S894(gdrive)Apk mirrorhttps://drive.google.com/drive/folders/1h8V2OyzEs4gEzp3DP0Uu_jzEDL_vQTy2(gdrive)kcsdihttps://drive.google.com/drive/folders/185jGwRSzsMWJ_zN7QU0evX0764tY6kHK(gdrive)

author: nikitasius
author_rank: Regular Contributor
timestamp: April 13, 2025, 07:40:38 pm
content: Got weird bug today on old 1.59 FW. Turned off, let on canapé, turned on, got this:https://drive.google.com/file/d/1M-ul9TKoBFQ70IQQdlciBYPF2pxnKkM5/viewSolution: long press on power button.