The PBY Catalina used a GO-9 transmitter, the ground version of the GO-9 transmitter was the TBW. The TBX also fits in there somewhere as being a primitive and troublesome radio to operate, at least in military context because I have owned and operated them before and love that radio and then there is the TBY.  Looks all related to me! Wonder if there was a TBZ?

From: [email protected] <[email protected]> On Behalf Of Charlie L.
Sent: Thursday, October 16, 2025 12:47 PM
To: [email protected]
Subject: [Milsurplus] Ebay TBY

Well those went fast, but ha ha, when the note said TBY the first thing that came to mind was something else:

Charlie, W4MEC in NC