Unfortunately, it cannot transmit on HF. We are only replacing the FM receiver IC with the SI4732 module, which is an HF all-band receiver. The TX path remains the BK4819, which operates in FM modulation above 18 MHz. In conclusion, the UVK6 is unable to transmit in the HF band.
The heart of the UVK6 is the BK4819 FM transceiver IC. To get the UVK6 to transmit on HF, it will require a major overhaul-likely the toughest nut to crack in the entire process.
Both use the same chip but have different component arrangements and PCB layout, likely due to two groups of manufacturers in China. v2.5 is the superior option for a dual antenna solution.
@@vu3zag I've read that v5.0 uses a different circuit for the BGA427 amp which gives 22dB of gain compared with 18.5dB for v2.5. This is according to the application notes for BGA427. This would make v5.0 superior would it not? Although the difference would hardly be noticeable. Would be happy to get your opinion, and thank you for this excellent video.
Yes, it's safe to use both antennas. The stock antenna connects to the built-in transceiver chip for VHF/UHF operation, while the new SMA antenna is limited to receiving HF signals.
Please note that v5.0 comes from a different manufacturer, and v2.5 is not simply a predecessor to the v5.0 module. In fact, v2.5 module has a better design.
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Thanking you most kindly from England
What is price of quansheng in your country
Ausgezeichnet erklärt 👍 Danke 😊
Well explained and very useful. Thank-you. 👍
Is this 1:14 diagram all that needs to be done to connect the module to the new radio? Specifically to the UV-K5 (8)?
Yes
Can you effectively transmit over HF this way? If you use an appropriate HF EFD would it be able to reach out enough to make contact?
Unfortunately, it cannot transmit on HF. We are only replacing the FM receiver IC with the SI4732 module, which is an HF all-band receiver. The TX path remains the BK4819, which operates in FM modulation above 18 MHz. In conclusion, the UVK6 is unable to transmit in the HF band.
It says LOCK after executing the mod with your method. What now?
Ok one of the pads was not soldered well.
Great 👍 , congratulations
Next stop, transmission capability on hf bans with a port to attach a cw paddle.
The heart of the UVK6 is the BK4819 FM transceiver IC. To get the UVK6 to transmit on HF, it will require a major overhaul-likely the toughest nut to crack in the entire process.
What are the major changes you got after install this new version pcb ? just for sharing our experience.thats all
Improvement in weak signal reception and audio quality.
@@vu3zaghow was the reception in airband??
Very cool 🎉
Whats the difference between the v2.5 and current v5.0 chip?
Both use the same chip but have different component arrangements and PCB layout, likely due to two groups of manufacturers in China. v2.5 is the superior option for a dual antenna solution.
@@vu3zag I've read that v5.0 uses a different circuit for the BGA427 amp which gives 22dB of gain compared with 18.5dB for v2.5. This is according to the application notes for BGA427. This would make v5.0 superior would it not? Although the difference would hardly be noticeable. Would be happy to get your opinion, and thank you for this excellent video.
what is diferent between an old module and new module?
Hope you skipped that part in the video..
Do you still use original antenna for vhf and do you need to have only one antenna at the time?
Yes, it's safe to use both antennas. The stock antenna connects to the built-in transceiver chip for VHF/UHF operation, while the new SMA antenna is limited to receiving HF signals.
How’s the reception in airband??
Good with external antenna, By the way Airband can be received without h/w modification..
@@vu3zagqsl, without the hardware mod audio in airband was garbled.
Lowest possible.
Can you please share link to purchase
I prefer not to paste a link here; instead, I recommend searching the Banggood website using this keyword. Si4732 v2.5
why did you go for v2.5 instead of v5.0?
Please note that v5.0 comes from a different manufacturer, and v2.5 is not simply a predecessor to the v5.0 module. In fact, v2.5 module has a better design.
@vu3zag Appreciate the quick reply, so what stands out between the 2 for you specifically?
👍👍👍👍
The most hackable radio ever
But still useless after hacks.