Buyer's guide
Which SD-Link adapter is compatible with your avionics?
All SD-Link adapters connect your radio to SkyDemon via Bluetooth – and to Sky-Map, VFRnav, EasyVFR, or XCSoar – and send frequencies from the app to the radio with a tap of your finger . The difference lies in the four variants: Standard, Dual Source, Angled, and PigTail. Here you can see which one is suitable for which situation.
Overview
A comparison of the four variants
| Variant | What it's made for | When you choose them |
|---|---|---|
| StandardSingle Source | Connects your radio directly to the navigation app. | The standard case: one radio, no connected EFIS in the signal path. |
| Dual Sourcewith EFIS | Works in parallel with an existing EFIS on the same radio. | Your cockpit has an EFIS, which is also connected to the radio. |
| Angledangled | Angled connector for very tight installations behind the radio. | There is little space behind the radio for a straight plug. |
| PigTailBinder bushing | Connection via the radio's binder socket instead of via the wiring harness. | Your radio is connected via a binder socket (e.g., Funke ATR833). |
Decision support
Here's how to find your version
Go through the cases from top to bottom – the first one that applies is your version:
The adapter finder tells you in three steps which version your specific radio needs – including special features like the installation direction for angled adapters. The compatibility page shows which radios have which versions.
What matters
Here's what you should pay attention to when making your choice
Your radio
Buying guide for your radio
Do you already know which radio is installed? Each buyer's guide shows you the compatible SD-Link variants, installation instructions, and frequently asked questions about your device:
Frequently asked questions
Questions about the choice of variant
Single Source or Dual Source – what is the difference?
Single Source (standard) connects only your radio to the navigation app. Dual Source is intended for cockpits where an EFIS is also connected to the same radio – the adapter then works in parallel with the EFIS.
What is the PigTail variant?
The pigtail is connected via the transceiver's binary connector instead of the wiring harness. This is convenient if your transceiver is connected via a binary connector, for example, the Funke ATR833.
When do I need the angled adapter?
If there's limited space behind the radio and a straight plug won't fit, an angled adapter is a better choice, as it's more compact. The exact installation direction depends on the radio – the adapter finder takes this into account.
Which version is compatible with my radio?
This depends on the radio and the installation situation. The adapter finder guides you to the right version in three steps; the compatibility page also shows which versions are available for which radios.
Couldn't this also be done with a generic Bluetooth serial dongle?
A generic dongle only relays raw serial data—wiring, pin assignment, and the protocol of your radio remain your responsibility, and most apps only pair with adapters they recognize. SD-Link is plug-and-play, tailored to your radio, and natively supported by SkyDemon, Sky-Map, VFRnav, EasyVFR, and XCSoar.
Find the right option in three steps
Describe your radio and avionics – the adapter finder will show you the appropriate SD-Link variant.