I have an RCA RadioMarine AR-8506A (R-203A) receiver. Other than those
installed on Liberty and Victory ships (part of the 4U radio system),
can anyone tell me where else they were used? My particular unit has
what appears to be a (typical) Signal Corps inspection stamp on the
front panel and has the heavy steel/brass shockmount case with it.
Those installed in the 4U systems don't use the case. Inside the case
there's a stamped placard with a statement regarding Maritime Commission
approval. I believe I heard somewhere that the Corps of Engineers used
these on their ships and dredges? Anyone know? Thanks much.

On Apr 30, 3:28 am, K3HVG wrote:
I have an RCA RadioMarine AR-8506A (R-203A) receiver. Other than those
installed on Liberty and Victory ships (part of the 4U radio system),
can anyone tell me where else they were used? My particular unit has
what appears to be a (typical) Signal Corps inspection stamp on the
front panel and has the heavy steel/brass shockmount case with it.
Those installed in the 4U systems don't use the case. Inside the case
there's a stamped placard with a statement regarding Maritime Commission
approval. I believe I heard somewhere that the Corps of Engineers used
these on their ships and dredges? Anyone know? Thanks much.

Hey Jeep, I remember working on a couple of those receivers years ago.
I used to see them back in the 70's and early 80's, I used to work for
ITT Mackay in Houston. RCA had a service depot back then that usually
did all the service on the RCA consoles. I did work on a few of the
RCA consoles and did FCC inspections on them back then. They were real
common on a lot of American commercial ships. I remember a battery
operated RCA regenerative receiver, I cannot remember the model. It
was used for the emergency receiver and it was very sensitive and was
great for receiving on the medium frequencies. Hopefully someone will
give you a lot of good info on this AR-8506A. 73, Randy, WB5KCM