[Irbyman]

Hi, my Flight Design CTLS has developed an intermittent (but now more persistent problem). When using an active headset (Bose A20 & Dave Clarke) I can hear perfectly, but they are only transmitting a carrier wave. When I plug in older passive headsets no problem and I am getting readability 5. The setup is a Trig 97 and CW 3000 intercom. I have tried swapping sockets and it is the same issue in each. Any thoughts?

[Flyingmac]

Isn't the Trig TY97 radio 28 volt? . What's the CT? Just checked. 12 volt. So enough power to receive but not to transmit.

[riverrock83]

There is nothing special about microphones on active headsets - they are the same as passive ones (you can still use the headsets when the batteries run out). So your problem description is odd! I assume you've got standard GA twin headset plugs. I've seem some oddities when stereo headset connectors are used, when mono is expected (headsets often have a switch to jump to mono mode) but that wouldn't affect the microphone.
I'm not aware of a CW3000 intercom (there is a PM3000 but it has a 6 piece?)

[T67M]

Can you provide some more details please?

Hi, my Flight Design CTLS has developed an intermittent (but now more persistent problem). When using an active headset (Bose A20 & Dave Clarke) I can hear perfectly

What can you hear? Radio broadcasts from others? Your own radio transmissions? The person in the other seat transmitting? The intercom?

but they

Who? Other aircraft? The person in the other seat?

are only transmitting a carrier wave.

Are they transmitting carrier wave (as determined by other aircraft/ATC)? Or can you simply not hear what they're saying whilst they transmit?

When I plug in older passive headsets no problem and I am getting readability 5.

As determined by you in the same aircraft? As reported by ATC/other aircraft?

I regularly fly in one aircraft where the radios and intercoms work as in every other aircraft for transmit, receive, intercom, and own-sidetone, but cross-cockpit side-tone is incredibly low level, thus when the other pilot transmits, everyone can hear them except me - which as I'm usually flying as the instructor, makes it VERY hard to teach! This can be caused by 3-way incompatibility between the headset impedances and the radio.

[T67M]

Isn't the Trig TY97 radio 28 volt? . What's the CT? Just checked. 12 volt. So enough power to receive but not to transmit.

The TY97 is 22-33V with a 16W transmitter and is (IME) very rare in GA aircraft.

The physically identical TY96 is 11-33V but only a 10W transmitter. Almost all of the GA installations I've seen have been the TY96.

I suspect the aircraft in question has the TY96 installed - otherwise I fail to see how it could ever work no matter which headsets were plugged in.