I am looking for a schematic for a Collins 18 S-4. It is apparently a 10
channel 100 Watt tranceiver that was used in aircraft. I have two of them
that have had the dyno's removed. They look pretty hefty with an 813
modulated for AM by a pair of 811A's. They have a removable cover on the
front to manually change channels. It is simply a rotary switch with a
screwdriver slot.


The only source I found wants $75.00 for a manual for what is probably a
$10.00 radio.

Thanks all