[ARC5] [Milsurplus] B-15 Photo (E-4-AE, E-4-AF)

[Mike Morrow]

Hue Miller asks:

> In the B-15, what is the box connected to the top receiver, to the left of 
> the receiver?

That is Radio Compass Modulator E-4-AE or -AF, part of Radio Compass SCR-AA-186 or SCR-AB-186.

SCR-AA-186 uses:
BC-AE-229 receiver
E-4-AE modulator
E-4 manually rotatable loop and L-o-R indicator
Tunes 200 to 1600 kHz.

SCR-AB-186 is the same except AE components are AF.

These were 1935 sets.

Mike Hanz has the best pictures and description on the web of the compass system that uses the E-4-A* radio compass modulator.

> At the left of the radio table, against the wall, what is that box?

That's the top half of the BC-AA-191 transmitter, part of the SCR-A*-187 liaison system, 1935 or 1936.

Mike / KK5F