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Liz Cray
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Old Pages/Amateur/HAM_HT_Baofeng_UV-3R.md
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Old Pages/Amateur/HAM_HT_Baofeng_UV-3R.md
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## Overview
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The UV-3R family of radios are dirt cheap 2W handheld transceivers with
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reasonably good stock features especially given the price. They can be
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very easily modified to take advantage of the on board MCU and crappy
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programming of that MCU. The UV-3Rs are software controlled radios (not
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SDRs) the DSP isn't controllable beyond squelch thresholds (afaik) which
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means only when and where to transmit and receive not any changes to
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modulation or demodulation.
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## Links
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### General Info
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- [uv3r.com](http://uv3r.com/)
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- [bricklore UV-3R tagged](http://www.brickolore.com/search/label/UV-3R)
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- [bricklore UV-3R Mark II
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tagged](http://www.brickolore.com/search/label/UV-3R%20Mark%20II)
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- [Lior's
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Work](http://www.liorelazary.com/index.php?option=com_content&view=article&id=51:hacking-the-uv3r&catid=14:baofeng-uv5r&Itemid=17)
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### Modifications
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#### Software
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- [CHIRP](http://chirp.danplanet.com/projects/chirp/wiki/Home) - a free,
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open-source tool for programming your amateur radio. (appears to
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support the UV-3R)
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- [firmware modification
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tool](http://www.radioaficion.com/HamNews/articles/9289-baofeng-uv-3r-220-mhz-soft-mod.html)
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- [manufacturer's software
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tool](http://www.brickolore.com/2011/12/baofeng-uv-3r-software-version-110-uv.html)
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- ["Out of
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range"](http://hamradio.selfip.com/i6ibe/baofeng/frequenze.htm)
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#### Firmware
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- [FOSS
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Firmware](http://www.liorelazary.com/index.php?option=com_content&view=article&id=51:hacking-the-uv3r&catid=14:baofeng-uv5r&Itemid=17)
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- pads can be fragile or lift off easily.
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[User:haxwithaxe](User:haxwithaxe "wikilink") recommends using a
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nonsolder based means of connection.
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- code: [on github](https://github.com/lelazary/UV3RMod)
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- feature set beyond stock firmware as of 2013/04/08 noonish [ripped
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from WISHLIST on
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github](https://github.com/lelazary/UV3RMod/blob/master/WISHLIST)
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- Quick interface to program rx freq, tx freq, power and PL code
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very quickly for repeaters. No offset, you just start with the rx
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freq and shift it by whichever amount you want. This will allow
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allow you to turn off the tx, or operate satellites. At any point
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during this mode, you can hold the mem channel and it will ask you
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which number you want to save this to.
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- Memory mode will allow you to go through your saved memory. At any
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point you can press menu and change more details about the
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channel. The details will include power with granular level, DTMF
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TX/RX, and other functions TBD. This mode will show the channel
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name and the freq underneath it.
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- Satellite Mode: Auto tuning of the frequency with response to the
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Doppler shift.
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- (not yet) Digital mode. Hopefully I could add some text base
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digital data for rx and tx. You might need to tx the text using
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morse code since there is no alpha numeric keypad on the radio.
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The digital mode will also include a store and repeat message
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forwarding.
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- (mostly implemented) Computer mode: All the functions of the radio
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including the RDA1846 registers, TX, and RX will be controlled
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through the serial port on the radio.
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- Fox/Hunt mode. Can be used to transmit a signal intermittently
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(like call sign morse code). Or send the RSSI signal into the
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audio, and with a directional antenna you can go hunting.
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- (not yet) Advance mode: Any RDA 1846 register can be set manually
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and saved for during startup.
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- (not yet) If the digital mode works, then RF programming of the
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radio. This will allow anyone to send you repeater information
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from their memory locations. I will work by selecting a memory
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channel to rx, and pressing a button. Then on another radio you
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can send the programming info.
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- (not yet) APRS mode: Boots straight to 144.39 mhz (or whatever you
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set it to), doesn't accept inputs, stays on the set frequency.
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#### Hardware
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- [computer interface for
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satelite](http://hamradio.selfip.com/i6ibe/baofeng/baofeng.htm)
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- [DIY programming
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cable](http://uv3r.com/images/uv-3r_programming_ha4bf.jpg)
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- [APRS
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rig](https://sivantoledotech.wordpress.com/2011/12/23/building-an-aprs-tracker/)
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(without foss firmware)
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- fixes:
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- [spurious
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harmonics](http://www.brickolore.com/2011/11/baofeng-uv-3r-second-harmonic-issue.html)
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- [very low, low
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power](http://groups.yahoo.com/group/UV-3R/message/4036)
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#### Recommended Modifications
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- fix harmonics (needs links)
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- fixes as needed: speaker volume, [mic
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volume](HAM_HT_Baofeng_UV-3R_Mic-Volume "wikilink"), super-low
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low-power (needs links)
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## Notes
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- **DON'T BUY THE PROGRAMMING CABLE** you can use a 3.5mm stereo plug
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and a usb to serial device. (pinouts available
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[here](http://uv3r.com/))
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- If you buy one the only working setup for using the manufacturer's
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programming software found by
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[User:haxwithaxe](User:haxwithaxe "wikilink") has been Windows7 with
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**Vista** drivers for the Prolific serial adapter.
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- others have had success with WINE and in XP but since many of the
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cables have counterfeit controllers they have varying levels of
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functionality with different drivers.
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- [User:haxwithaxe](User:haxwithaxe "wikilink") used a VirtualBox VM
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with usb pass through.
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### Recommended Accessories
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- A wide based flush fit BNC (or similarly durable connector) adapter
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(sometimes called an antenna saver) given the short mating cycle "SMA
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connectors are rated for up to 500 mating cycles" [citation via
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Wikipedia](https://en.wikipedia.org/wiki/SMA_connector)
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- example: [SMA Male to BNC Female
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Connector](http://thumbs4.ebaystatic.com/m/mUgb7YRjFqInb9GoQZVkQMw/140.jpg)
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- Also you can replace the adapter much more easily than the SMA
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connection in the radio.
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- You can even apply some threadlock (the light duty stuff) to the
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threaded part and still keep the groundplane continuity because of
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the wide base on the adapter touching the rim of the SMA socket.
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- Get a dedicated antenna for the VHF and UHF (or whichever you will use
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the most). The dedicated antennas will do wonders for performance as
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the stock antenna is really pretty horrible and multiband antennas in
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general can only be so good on any given band they are tuned for
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before the others suffer, so they end up being okay at best on all of
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them. If you followed the above then get a BNC terminated antenna and
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don't worry about adapters for the antennas.
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## Hardware Versions
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There are a large number of internally identical radios with very
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nonstandardized names in the UV-3R and UV-5R family.
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- UV-3R is the first iteration of the UV-3R series it is it's own beast
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for the most part
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- Mostly-clones UV-100 and UV-200
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- UV-3R MKII is the next oldest and has several variants
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- UV-X4 - Just a rename for marketing?
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- UV-3R+ (aka UV-3R Plus or UV-3R + Plus)
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- different battery and charging method - has an actual charging
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cradle but battery type is not common
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- different audio jacks (separate speaker and mic/ptt)
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- female instead of male SMA (not RP-SMA)
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- [UV-5R](HAM_HT_Baofeng_UV-5R "wikilink")
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