I have two Collins PTOs for sale. Will take $200.00 each for them. One is a 70E12 which fits the 75A2 or A3. The other is a 70H9 which fits the T368 military transmitter. These units appear to have been refurbished and sent to a government warehouse then declared surplus. I can take pictures if you wish and email to you. 73 Jim/W5JO