Lemo conversion to GA

[marnold22]

I'm a proud new owner of a 2008 Da40! It's been great so far. I'm looking for guidance on a Lightspeed headset with Lemo plugs. Our DA40 has GA plugs. I bought an adapter that connects the Lemo headset but not getting the noise cancellation, despite having batteries in the adapter. Is there a work-around to get the noise cancellation?

[mhoran]

http://www.qrmounts.com/store/p26/Power ... craft.html will power the headset from the plugs in the DA40. It was custom designed for DAN members (read more here: viewtopic.php?t=8274).

[marnold22]

Thank you!

[mhoran]

I'm not totally sure why the noise cancellation wouldn't work with batteries. It should, but I don't have the Lightspeed myself. However, this adapter is great since you won't need batteries at all. It will turn the headset on and off automatically with the master switch (at least it does with my DC headset.)

[Rich]

I'm a proud new owner of a 2008 Da40! It's been great so far. I'm looking for guidance on a Lightspeed headset with Lemo plugs. Our DA40 has GA plugs. I bought an adapter that connects the Lemo headset but not getting the noise cancellation, despite having batteries in the adapter. Is there a work-around to get the noise cancellation?

Which light speed? The Zulu 3 LEMO has no provision for batteries. The Delta Zulu does.

[Rich]

I'm not totally sure why the noise cancellation wouldn't work with batteries. It should, but I don't have the Lightspeed myself. However, this adapter is great since you won't need batteries at all. It will turn the headset on and off automatically with the master switch (at least it does with my DC headset.)

Specifically the avionics master provides the power. I have had folks not understand the distinction.

[Boatguy]

I'm a proud new owner of a 2008 Da40! It's been great so far.

Congratulations and welcome!

I don't have the answer, but I think the OPs question may have been misunderstood. As I read it, the plane has GA plugs and he has a Lightspeed headset with LEMO plugs and a GA>LEMO adapter. If it's the Lightspeed adapter, it provides no power and is relying on power from the GA sockets.

As Rich says the Avionics Master must be on, but I don't know if or how that provides power to the GA sockets.

[Rich]

I'm a proud new owner of a 2008 Da40! It's been great so far. I'm looking for guidance on a Lightspeed headset with Lemo plugs. Our DA40 has GA plugs. I bought an adapter that connects the Lemo headset but not getting the noise cancellation, despite having batteries in the adapter. Is there a work-around to get the noise cancellation?

Which light speed? The Zulu 3 LEMO has no provision for batteries. The Delta Zulu does.

Follow up. Not to insult you or anything, but to use the batteries for noise reduction/Bluetooth absent the power feed you need to manually power it on.

[Rich]

As Rich says the Avionics Master must be on, but I don't know if or how that provides power to the GA sockets.

The Diamond avionics bus provides power to the tip contact of the dual plug setup for the mic. This is known as "tip power" and was a way in which some Sennheiser headsets of yore were powered. The commonly available dual plug/LEMO adapters do not tap this contact, requiring battery power. The ones specially made for Diamonds tap this contact and connect it to pin 1 of the LEMO fitting.

I made several of these kinds of adapters but now they are available as Matt posted. We have since discovered that this can be incompatible with certain dual plug setups in other types of aircraft. You might need one of the other types and in any case a battery-enabled headset for such aircraft.

[Mjwatlanta]

I tried the GA to Lemo conversion plug with Bose A30 lemo headset. It works well sort of. It does not completely eliminate the need for batteries but they lasted way longer than otherwise. But I had the Sportys direct GA handheld backup radio. The connector does not work with the radio. So I bought another adapter. Then I discovered that the lemo adapter while good was not completely eliminating need for batteries. I went back to my GA powered headset and kept the radio.