[ARC5] ARC5 receiver audio output questions

[Bruce Long]

Hello All
I am building a combined ARC5 receiver power supply and audio amplifier.

I would like to know more about the audio output from an un-modified ARC-5 family receiver.

What is the intended output impedance?   600 Ohms?
What is the audio output power/  I know a ARC5 receiver can drive an 8 Ohm speaker with low to moderate volume if a matching transformer is used.  I think this means the audio power output is something like 50 mW or lower.

What is the audio voltage when operating into its intended ( headphone?) load.

I need this information in order to properly terminate the receiver audio out line and to set the gain of the audio amplifier i am adding to drive a conventional speaker.

I do not have a functional receiver to test, that is why i am building the power supply.

Thank you for your assistance....bruce   kj3z