# FlySky FS-CT6B: specs

> A 6-channel 2.4 GHz computer-programmable radio transmitter from FlySky using the AFHDS protocol, for model aircraft, gliders and helicopters. It…

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A 6-channel 2.4 GHz computer-programmable radio transmitter from FlySky using the AFHDS protocol, for model aircraft, gliders and helicopters. It works with a matched receiver (the FS-R6B is a separate part) and is configured from a PC through its PS/2 port.

Every value cites its sourcePinout not published

[Buy on Compoden](https://compoden.com/products/radio-transceiver-6-channel-flysky-fs-ct6b)

## Specs

| Spec | Value | Source |
|---|---|---|
| Channels | 6 | source Specifications |
| RF range and power | 2.4055 GHz to 2.475 GHz; RF power less than 20 dBm | source Specifications |
| Protocol and modulation | AFHDS; GFSK modulation | source Specifications; manual section 6 Transmitter parameters, p.5 |
| Transmitter power | 8 x 1.5 V AA cells (12 V); low-voltage alarm below 9 V | source Specifications; manual section 6, p.5 |
| Transmitter static current | 250 mA or less | source Section 6 Transmitter parameters, p.5 |
| PC / simulator port | PS/2 port (PPM); charger port present | source Specifications; manual section 6, p.5 |
| Antenna length | 26 mm | source Specifications |
| Receiver power (FS-R6B in the manual) | 4 x 1.5 V AA cells | source Section 7 Receiver parameters, p.5 |
| Receiver static current | 85 mA or less | source Section 7 Receiver parameters, p.5 |
| Receiver sensitivity | -105 dBm | source Section 7 Receiver parameters, p.5 |
| Online update | No | source Specifications |

## Power

| | Value | Source |
|---|---|---|
| Supply | Transmitter: 8 x AA (1.5 V each, 12 V total). Receiver: 4 x AA. | source Sections 6 and 7, p.5 |
| Current | Transmitter 250 mA or less static; receiver 85 mA or less static | source Sections 6 and 7, p.5 |

## Pinout
We don't publish a pin table for this part: no official source we could verify gives one. Check the labels printed on your module, and see the notes below.

The maker's pages and manual do not list connector pins for the PS/2 port, the charger port or the receiver outputs in text. No pin table is given.

## Build with it
Project ideas for the FlySky FS-CT6B. Each link opens Soldr with the prompt filled in; Soldr assigns the pins, checks power and shows how to wire every part.

- [Radio-controlled pan-tilt camera mount](https://app.soldr.ai/?prompt=I%20want%20to%20build%20a%20radio-controlled%20pan-tilt%20mount%20that%20moves%20two%20micro%20servos%20from%20the%20transmitter%20sticks%20using%20a%20FlySky%20receiver%20and%20a%20four-cell%20AA%20pack): The FlySky manual shows the receiver and servos on one battery, with the receiver rated for four AA cells. The MG90S maker page gives 1.8 kg/cm at 4.8 V and 2.2 kg/cm at 6.6 V; fresh alkaline cells can sit near the 6.6 V row, so measure the loaded pack voltage. The servo's current is not published, so do not add more than the two servos without checking the pack.
- [Radio-controlled turntable](https://app.soldr.ai/?prompt=I%20want%20to%20build%20a%20radio-controlled%20photo%20turntable%20that%20turns%20a%20continuous-rotation%20servo%20when%20I%20move%20a%20stick%20using%20a%20FlySky%20transmitter%20and%20receiver): A continuous-rotation servo turns at a speed set by the channel signal, so a stick sets speed and direction. The servo's current and voltage limit are not in the FlySky manual, so check the servo's own rating against the four-cell pack before use. Learning project.
- [Radio-controlled lid opener](https://app.soldr.ai/?prompt=I%20want%20to%20build%20a%20radio-controlled%20lid%20opener%20for%20a%20prop%20box%20that%20moves%20a%20micro%20servo%20with%20a%20switch%20on%20the%20transmitter%20using%20a%20FlySky%20receiver): The transmitter has switches that drive spare channels, and the receiver has six outputs. Power the receiver and servo from the four-cell pack and measure the loaded pack voltage against the servo's 6.6 V figure. Learning project; keep fingers clear of the lid.

## Common mistakes

- Running the transmitter on tired cells: it sounds a low-voltage alarm below 9 V, which is about 1.1 V per cell with 8 cells (source: [link](https://www.flysky-cn.com/product-type-air-ct6b-english), Specifications).
- Skipping the receiver match step when pairing with another transmitter: the manual describes binding with the match line in the receiver's battery port and the match key held while the transmitter is switched on, taking about 10 s (source: [link](https://www.flysky-cn.com/s/FS-CT6Bmanual-lb6d.pdf), section 10.01, p.8).
- Mounting the receiver and its antenna module without care: the manual says the receiver module and the main receiver should be installed at 90 degrees to each other (source: [link](https://www.flysky-cn.com/s/FS-CT6Bmanual-lb6d.pdf), section 9, p.7).

## Not covered by the official source

- The product page lists 511 g and the manual 575 g for the weight, and the two give different sizes, so weight and size are not used.
- The receiver's output signal type and pulse timing are not given in the manual's text.

## Sources

- [link](https://www.flysky-cn.com/product-type-air-ct6b-english) (FlySky FS-CT6B product page, specifications; maker host)
- [link](https://www.flysky-cn.com/s/FS-CT6Bmanual-lb6d.pdf) (FlySky FS-CT6B user manual, 2.4G 6 channel remote system, sections 6 to 10; maker host)