RF out for commercial airliners

[oldradioguy2010]

Just wondering what the RF. output is on airliners as they fly over. I monitor LA. (cal.) approach from Oxnard CA.
Thank you

DW
So.Cal

 

[JASII]

I assume that you are referring to the AM transceivers operating on 118-138 Mhz. If I recall correctly, the transmit power is often 10 or 20 watts.

 

[JASII]

• This one is 36 watts.
• 
  
• 36W (P.E.P.) RF output power

IC-A120

VHF Air Band Transceiver

sarasotaavionics.com

 

[oldradioguy2010]

Thank you Jas11.
Yes the AM. Transceiver.
Thank you. DW.

DW.
So Cal

 

[oldradioguy2010]

I did not think that too much RF coming out.
Being the height of flite.

DW.
So. Cal

 

[xms3200]

Actually, Collins makes the radios that almost 100% of the airliners use in commercial airlines use. The models VHF-900, -920 and the latest VHF-2100 are all 25W transmit power P.E.P. And for the HF transceivers, all are 400W PEP on USB, 125W on AM which is very rarely used.

 

[ATCTech]

Also, the older Bendix-King KY-197 and KY-196 series were 7W or 16W output respectively. Still some of them around in 1980s and likely early 1990s airframes as well.

BendixKing KY-196

Detailed avionics part information page for BendixKing KY-196 Panel Mount VHF Comm Transceiver

www.seaerospace.com

 

[xms3200]

Yes, for commercial airliners such as Boeing, which I work on, all of them are 25W as compared to the General Aviation models which seem to be of lesser power.

 

[xms3200]

For airliners, these VHF transceivers have to conform to Arinc 716 standards which the GA models do not.

 

[eorange]

I remember finding the specs for the radios in F-16s and it was also 25W.

 

[oldradioguy2010]

Thank you for the flyers (no pun) on the Bendix and icom.
Have me more to digest.

DW
So. Cal

 

[WB9YBM]

I assume that you are referring to the AM transceivers operating on 118-138 Mhz. If I recall correctly, the transmit power is often 10 or 20 watts.

over-seas flights are also capable of SSB on HF (some pilots with ham licenses as well as ham friends of pilots have been known to show up in the ham bands when they get bored--like at the mid-Atlantic portion of their flight).