Maybe someone can shed some light here for me on my TR-4 and AC-4 vintage.
Per Ron's web site, my TR-4 which is serial number 26590 would have been built around early 1967
My AC-4 power supply is serial number 28573 which would make it much earlier than any on the list. The list begins with a 37105 serial number built in January 1971.
I would guess that my power supply would be of similar vintage to the transceiver. Surely there are other recorded serial numbers pre 71. ? There must be something I dont know about that serial number sequence.
I bought my rig from someone whom I think had bought it new. I dont think he ever got a ticket, and just received with it. I bought it in probably fall 1975. I know he worked at Rath Packing company in Waterloo Iowa with my dad. I was 14 at the time. I just remember handing over my 300 dollars, which seemed like all the money in the world to me.
It sort of was, when you detassle corn and dovetail cabinet drawers for a "living" and ride a bicycle to work.