Happymodel OVX300 VTX

My Review

The Happymodel OVX300 is a standard among whoop racers and freestyle pilots. This VTX is fairly lightweight while maintaining a somewhat larger PCB, which I believe might be the reason it doesn't overheat as fast as other VTX's. While this has never been a concern for me, I do know that some people don't like the smaller solder pads on this VTX. The main issue I have with this VTX is that it lacks a 5v and GND passthrough for the camera. This normally isn't an issue, but since the most popular flight controllers today don't have dedicated 5v and GND pads for a camera, it's convenient to have a VTX with those extra pads. This isn't a dealbreaker and lots of people use these VTX's on their pro racing builds, myself included, but it would be convenient to have them. What I really like about this VTX is the fact that it uses OpenVTX, which is open source and highly configurable VTX firmware. If there's ever a problem with an OpenVTX VTX such as this one, it can often times be fixed by tuning output power or reflashing the firmware. This usually isn't necessary, but it does mean that, on the off chance you get a VTX that wants to behave a little funny, it's fixable, which isn't the case for other brands!

From Happymodel

The Happymodel OVX300 VTX is based on the Open source project OpenVTX powered by JyeSmith (EpxressLRS team)

OpenVTX aims to provide firmware with both the SmartAudio and Tramp protocols. Either protocol can be used on the flight controller and on VTx power up the protocol used is automatically detected by OpenVTx.

More info and community:
https://github.com/OpenVTx/OpenVTx
https://discord.gg/uGUKaD2u8Z

Main Features

OpenVTX firmware preloaded
Smartaudio ready
Nano size and stable power output

Specifications

Model: OVX300
Frequency: 5.8G 40CH
Transmitting Power: 0/RCE/25mw/100mw/300mw
Power supply: DC 5V
Current (5v): <650ma (300mw)
Weight: 0.9gram without antenna
Standard size: 14*15*3mm

VTX Table

Copy and paste your choice of protocol VTX Table into the Betaflights CLI.

# SMARTAUDIO
# vtxtable
vtxtable bands 6
vtxtable channels 8
vtxtable band 1 BOSCAM_A A FACTORY 5865 5845 5825 5805 5785 5765 5745 5725
vtxtable band 2 BOSCAM_B B FACTORY 5733 5752 5771 5790 5809 5828 5847 5866
vtxtable band 3 BOSCAM_E E FACTORY 5705 5685 5665 0 5885 5905 0 0
vtxtable band 4 FATSHARK F FACTORY 5740 5760 5780 5800 5820 5840 5860 5880
vtxtable band 5 RACEBAND R FACTORY 5658 5695 5732 5769 5806 5843 5880 5917
vtxtable band 6 LOWRACE  L FACTORY 5333 5373 5413 5453 5493 5533 5573 5613
vtxtable powerlevels 5
vtxtable powervalues 1 2 14 20 26
vtxtable powerlabels 0 RCE 25 100 400
save

# TRAMP
# vtxtable
vtxtable bands 7
vtxtable channels 8
vtxtable band 1 BOSCAM_A A CUSTOM  5865 5845 5825 5805 5785 5765 5745 5725
vtxtable band 2 BOSCAM_B B CUSTOM  5733 5752 5771 5790 5809 5828 5847 5866
vtxtable band 3 BOSCAM_E E FACTORY 5705 5685 5665 0 5885 5905 0 0
vtxtable band 4 FATSHARK F CUSTOM  5740 5760 5780 5800 5820 5840 5860 5880
vtxtable band 5 RACEBAND R CUSTOM  5658 5695 5732 5769 5806 5843 5880 5917
vtxtable band 6 LOWRACE  L CUSTOM  5333 5373 5413 5453 5493 5533 5573 5613
vtxtable band 7 IMD6     I CUSTOM  5732 5765 5828 5840 5866 5740    0    0
vtxtable powerlevels 5
vtxtable powervalues 1 2 25 100 400
vtxtable powerlabels 0 RCE 25 100 400
save