I liked the Holybro Atlatl HV VTX because you could install it in the FC stack and made a clean build. It had all the features you’d need in a mini quad including SmartAudio and a microphone. And they have just released an improved version – the Atlatl HV V2 VTX.
Further Reading: How to choose VTX for Mini Quad?
You can get the Altatl V2 VTX alone, or with Kakute F4 or F7 flight controllers as a combo for a discount: http://bit.ly/2LBnPOw
- Onboard microphone
- Maximum transmitting power increased up to 800mW
- Improved LED indicators for channel, band and power, much easier to read than V1
- Weight has been dropped in the V2 (9.3g) from the first version (10.8g)
- Improved physical push button – you can now change all the settings with it without VTX control
- Holybro made sure PIT mode output power is low enough to minimize interference to other pilots in the air
- Output Power: 25mW, 200mW, 500mW, 800mW
- Pitmode (0.5mW)
- Built-in Microphone
- Antenna Connector: MMCX
- Input Voltage: 7V to 28 volts (allows for 2-6S LiPo direct power)
- Dimensions: 35x25x7mm
- Mounting Holes: Standard 30.5mm pattern
- Weight: 9.3g
Build quality looks great. Heatsink from the V1 has been removed in the V2, despite the maximum power has been increased to 800mW. There is a cut-out in near the connector, you can route the wires through to make your cabling cleaner.
The new push button is a lot easier to use than the previous version. You can now change all the settings using the button – channel, band and power. The V1 was really designed around VTX control (Smart Audio), and the VTX would be pretty useless without it. It’s great to see this improvement.
The Atlatl VTX comes with a durable MMCX connector with a pigtail cable. You have 25mW for racing, all the way up to 800mW for long range freestyle. The Atlatl V2 has offers Pit Mode so that you can power up your VTX to change settings without knocking other pilots out of the air.
SmartAudio allows you to control your VTX via your flight controller and so change channel, transmitting power and much more with this easy function. See this guide on how to setup VTX control.
Supports 40 channels, including Fatshark/ImmersionRC and Raceband.
The manual can be found on their website.
I always power off the VTX for it to cool down between each measurement to ensure the accuracy of the results.
It’s interesting that the power seems to decrease as frequency moves up. If you are in a race and required to use 25mW, channels with higher frequency are better as they are closer to 25mW 🙂 For those who want to get higher power for long range, try to use channels with lower frequency so that you get the maximum power 🙂
The advertised pitmode power is under 0.5mW, but from my testing i got around 0.7-0.8mW. A little bit higher but should be low enough to not cause problems.
There are two ways to enable Pitmode, either using VTX control (Betaflight OSD or LUA script), or simply hold down the button on the VTX while powering up.