Bug #1867
closedbaofeng band unlock
0%
Description
I've just unlocked my uv b6 from 10 MHz to 999MHz!
The original baofeng software accepts any freq in this range cause i've edited the setting.ini.
Just adding this:
Freq6=[001-399/400-999]
data6=0001993900409999
How can the chirp accept freq programming in this ranges like the original baofeng software?
Updated by Jim Unroe over 10 years ago
- Status changed from New to Feedback
Vitor,
CHIRP could easily be updated to allow the keying in the same frequency ranges that you have included in your Baofeng software hack. But just being able to upload a given frequency to the radio and get it to show up on the display does not qualify it as being "unlocked".
Back in April a came across a Russian blog that claimed that their testing had indicated that the VHF band of the radio could be expanded. That expansion could even include the 220 MHz range. So I modified my CHIRP and began testing to validate these claims. My results were this.
130.000-175.000 MHz (expanded range)
220.000-269.000 MHz (added range)
400.000-520.000 MHz (unchanged)
Anything outside of these ranges either did not transmit, did not receive or both. So these are currently the frequency ranges that CHIRP allows you to key in to the spreadsheet memory editor for a Baofeng UV-B5/B6 radio. Before the radio will use these frequencies, the band limits have to be expanded to include these frequencies, so the VHF band limits were also expanded to cover 128-270 MHz.
Since then, I have learned that when transmitting on frequencies in the 220-269 MHz range, the radio puts out more RF on the harmonics than it does on the fundamental frequency. Because of interference that this would cause, I have been considering removing the 220 MHz range support for the UV-B5/B6.
Besides getting these out-of-band frequencies to show on the display, what testing have you done to validate that they all (or any part of them) receive and/or transmit?
Updated by Ant ao over 7 years ago
Jim Unroe wrote:
Vitor,
CHIRP could easily be updated to allow the keying in the same frequency ranges that you have included in your Baofeng software hack. But just being able to upload a given frequency to the radio and get it to show up on the display does not qualify it as being "unlocked".
Back in April a came across a Russian blog that claimed that their testing had indicated that the VHF band of the radio could be expanded. That expansion could even include the 220 MHz range. So I modified my CHIRP and began testing to validate these claims. My results were this.
130.000-175.000 MHz (expanded range)
220.000-269.000 MHz (added range)
400.000-520.000 MHz (unchanged)Anything outside of these ranges either did not transmit, did not receive or both. So these are currently the frequency ranges that CHIRP allows you to key in to the spreadsheet memory editor for a Baofeng UV-B5/B6 radio. Before the radio will use these frequencies, the band limits have to be expanded to include these frequencies, so the VHF band limits were also expanded to cover 128-270 MHz.
Since then, I have learned that when transmitting on frequencies in the 220-269 MHz range, the radio puts out more RF on the harmonics than it does on the fundamental frequency. Because of interference that this would cause, I have been considering removing the 220 MHz range support for the UV-B5/B6.
Besides getting these out-of-band frequencies to show on the display, what testing have you done to validate that they all (or any part of them) receive and/or transmit?
does this really work with all baofeng models? Is it possible on BF888s?
Updated by Bernhard Hailer almost 5 years ago
- Status changed from Feedback to Closed
- Priority changed from Urgent to Normal
- Chirp Version changed from 0.4.0 to daily
- Model affected changed from all baofeng models to Baofeng
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