I suspect it was simply a TU-60 with a locally painted red front panel.  The TU-60 was a simple  wobbulator driven TU for the BC-191 and BC-375.  It's the only one I have in the directories I have here, and was apparently not very effective against its intended target, because none of the later directories mention it.  Attached are three photos of the one from August Link's collection.
- Mike  KC4TOS

On 4/19/2022 3:15 AM, Hubert Miller wrote:

German fighter aircraft apparently entered the war using HF equipment, with I think a TRF receiver.

I forget the Fu-number. Then ( I guess mid war ) the transition was to the 44 – 50 MHz band.

Bomber aircraft used the FuG10 system, which did have a HF component for 3 – 6 MHz. That means,

aircraft with a radio operator. So yes, the Tinsel system would "maybe" have proven worthwhile

during the Battle of Britain, not much after the war moved to the continent.

I still think painting BC-375 red would be a worthless exercise. If these had special components, like

maybe a wobbulator, just paint a big X on the front somewhere. It's not going to go into a repair depot

and disappear. ( Actually, a cruel thought occurred to me just now: with the BC-375, who needs a

wobbulator? )

-Hue Miller