pradeep

Thanks Jetboy I took off the impedance transformer and attached a volume controller. I will check how it feels with 550ohms on my next training session and keep posting. Thanks again, i_dunno

Sorry if I am unclear on my explanation of my question. My worry is whether I can use a high impedance (550ohm) earphone headset with a recreational intercom / radio without any modifications? The usual DC headsets are 150ohm impedance. The type of plane is Tecnam P92 Echo Super. Thanks for your replies.

Hello all, I am a student pilot learning to get my recreational license. Recently I bought a DC headset which was actually designed for railroad applications. From its circuit diagram I found out that it has 2 nos 275ohm series connected earphones. It came with low to high impedance adaptor. But I thought as the earphones are already on high impedance (550ohm total) I can take off the impedance transformer, and also thinking of connecting the earphones in parallel to make it 137.5ohms which is approximately equal to DC's other headsets - 150ohm). Before doing this I am just wondering what would be the supported earphone impedance range a radio on recreational airplane will support. I read somewhere that it is possible it can support between 600ohms to 150ohms. If so I need not have to convert the earphones into parallel. Your valuable comments and advice re this will be highly appreciated. With advance thanks, Pradeep

Tecnam P92. Today I have my first lesson (apart from TIF), not sure of the weather though, couldn't wait to fly...

Hello All, I have recently joined the forum and had my first TIF and waiting on the starting day of my training. Thanks for all you maintained this forum. Cheers Pradeep