Hello to the group

I obtained a very nice R-13B rcvr w/dynamotor , tuning control head ,MT 1175/ARN 30A rack and Converter Signal ARN 30 . I need to find where I can get the audio out into a pair of head phones.A pin out on the rear ctr of the rcvr would also be helpful.

Thanks for the help
PaulĀ 
N6FEG