RT-470 10 Watt Ham Radio NOW UNLOCKED (Firmware Upgrade Guide) 

Thank you for your recognition and support of our walkie talkie. The introduction is very detailed👍👍

I've been watching your guitar videos for years and just stumbled across this channel now. Just started in GMRS and I'm studying for my HAM license now. 30 year aircraft mechanic/A&P also. If you haven't tried metal detecting yet, I highly recommend it. Based on your interests, I can confidently assume you'd enjoy it. Keep up the videos. 👊

Nice video,, I currently have this radio , along with a couple of Baofengs and a tyt, and was looking for more info on the firmware update!! Simple, straight to the point!.. It is an awesome radio and I too have it with me in the vehicle! From one guitarist to another,, great job!

Great tutorial. I think I'll order one to go with my Radioddity and Baofeng Radios. Looks like a nice step up.

Thank you so much for the video tutorial! Gentlemen who talk about harmonics and spurious, should know that it is always better to transmit only on frequencies 144 - 430. The rest is intended for reception only. But this is on all radios. Whether Quansheng or Baofeng!

Great video. Useful, direct and concise information! Subscribed.

That’s pretty awesome I have the same radio, I’ll have to check that out, I mainly only use the 2m and Gmrs bands but that is cool to pretty much have that many frequencies to choose from 👍

Max?! Wow I didn't know you were a radio guy too, that's awesome... Subbed!

The new pcb version has lower filtering on vhf so it can output 5W on 295mhz (military satcom sattelites), old one will still do 4W, also...the old and new pcb will actually both tx under 100 mhz 😸

A quit follow up to my first comment,, did you notice any change in receive quality after the firmware upgrade,, It seems to my wife and I that it has improved,, just wondering if you may have noticed or thought so..

I just buy the R490 any tutorial soon ?

I don't see how this can be effective in a radio that was originally designed for a much narrower range. Most of these direct conversion radios have 2 RF final output drivers, one for VHF and one for UHF. On everything but the worst bargain-basement brands, each is (supposedly) tuned with a bandpass filter in the selected frequency range, to keep harmonics outside the band down to an acceptable level. Opening up a radio to double the maximum Tx frequency either implies there aren't any effective bandpass filters in place, they're being disabled by this firmware, or Tx power drops off due to the final output filter being designed for a much smaller band. It would be interesting to see results from a power meter as well as a spectrum analyzer to see how well-behaved this radio is, with both the old and new firmware. That testing should be done into an impedance-matched dummy load, since no single antenna is going to be tuned to the entire frequency range the new firmware can transmit on. I say "supposedly" because different units of the exact same model and firmware have shown vastly different results on a spectrum analyzer (for quite a few assorted radio models and manufacturers). It seems like the filters aren't being "tweaked" by changing the coil spacing, so however it was assembled is what you get. I also wanted to address your comment about 'open source' firmware - I believe the groups that are doing this have looked at the factory firmware binary files and found the places where certain limits are stored (like 174 being the top frequency in VHF) and allow those to be changed. They've also found empty space in the radio flash memory and added some cool new features (for example, I believe there's a frequency waterfall display). But these are all things that are added by their customization utility to a factory firmware image, not a completely new image. And just because it is a bunch of volunteers doing this instead of a large corporation doesn't necessarily make the code worse, and you can always revert to pure factory firmware. While I don't do firmware mods, I do modify the programming software (and I've looked at the "All Band Walkie" software you're using but haven't done anything with it yet). Did you notice the yellow "Do you want to allow this app from an unknown publisher to make changes to your device"? All of the factory software does that because it isn't digitally signed, could have malware from the factory (unlikely) or could have been tampered with along the way. My "hobby" version of the CPS is digitally signed with my Windows code signing key and you get a blue box with a "verified publisher" notice instead of the scary warning. My resolved bug fix / improvement list for the UV-17 Pro GPS radio family CPS is over 280 items at this point and has been very well received. So please don't dismiss something just because volunteers are doing it. If you want to look at it, you can find it on Miklor's UV-17 Pro GPS page, along with the factory programming software.

I am thinking to get a Radtel RT-730, can you make a video of that?

Any idea if you can do this with the 470x 10 watt?

Does this work for the 5W 470X version?

FYI: I was stupid enough to buy 3 of them and I regret wasting money. After buying a tinySA I find that harmonics rob 2/3 of the power, so only 1/3 is on the fundamental, because it has NO FILTERS. It's a splatter box and the worst radio I have come across. On the other hand I have 3 TIDRADIO H8s and they're clean 10 watts on frequency at a comparable price. Not all cheap Chinese radios are created equal. Though they are unlockable for VHF and UHF there's not airband, etc. A clean transmitting ccr with airband is the QUANSHENG UV 5 series. This $12 radio shows that radtel is lazy, stupid, or just greedy to market their crap. 73 KN6VYP

You are ignorant of the harm you are doing.