Review: BetaFPV A02 VTX – Powerful 800mW for Toothpick

by Oscar

The BetaFPV A02 VTX can be mounted on top of whoop style FC (great for toothpick and tiny whoops alike), with a powerful output power of 800mW. It’s currently a popular choice in a lot of RTF models on the market.

Learn more about video transmitters in this buyer’s guide.

Where to Buy?

You can get the BetaFPV A02 VTX from the following vendors.

It comes with the following items in the box:

  • A02 video transmitter
  • BetaFPV Air antenna (RHCP, MMCX connector)
  • 3 Rubber grommets for mounting
  • 1x cable

Specs and Features

Let me sum up the features and specs of the BetaFPV A02 VTX:

  • Adjustable Output Power: 25/200/500/800mW
  • Input voltage: 7V – 35V
  • Weight: 5.26g 5.9g (excluding antenna)
  • VTX size: 27.3×27.3×4.5mm
  • Support Bands/Channels: 5 bands (A B E F R), 37 channels (some channels are disabled due to law)
  • Supports SmartAudio
  • RF shielding to reduce interference (which also acts as heatsink)
  • It has 25.5×25.5mm mounting holes – fits Whoop and Toothpick Quad which use whoop style FC
  • Built-in microphone for audio
  • Has a connector/harness, no need to solder. But there are solder pads if you insist :)

Output Power Testing

I tested the BetaFPV A02 VTX with Powermeter from ImmersionRC, and here are the measurements.

R1 R2 R3 R4 R5 R6 R7 R8
25mW 26 26 23 22 21 20 24 22
200mW 185 / 170 / 156 / 190 /
500mW 475 / / / 465 / 520 /
800mw 590 / / / / / 662 /

How to Connect BetaFPV A02 VTX

Here’s is the pin out of the A02 VTX:

Seems like they made a mistake on the labels of the pins in the VTX they sent me. The second “SW” from the top is actually “GND” (ground). Not a problem as long as you are following the manual for connection.

Here is an example how to connect the A02 VTX to a flight controller, in this case the BetaFPV F722 AIO FC. The color of the lines in the diagram corresponds to the 6-pin connector’s wires’ color.

Betaflight VTX Table Setup

To change VTX settings through Betaflight OSD, you must first setup VTXTable in Betaflight.

Simply enter the following lines in Betaflight CLI. Please set channels to zero if they are not legal to use in your region.

vtxtable bands 5
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 5645 5885 5905 5925 5945
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 powerlevels 4
vtxtable powervalues 0 1 2 3
vtxtable powerlabels 25 200 500 800
save

How to Exit PitMode

PitMode allows racers to power up video transmitter during race events without interfering with others. It does this by reducing VTX power to the minimum, with a limited range of about 2-3m.

You can activate PitMode by pressing the button on the VTX twice.

To exit Pitmode, double-press the button, and it will return to the previous power state.

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