[blattimwind]

This is a transmitter, it can't receive replies.

But yes, they tested it:

> The transmitter produces a strong and stable signal at the fundamental frequency, but also produces strong unwanted harmonics, with the f2 being only 3dB down. Furthermore, the f3 is only 10dB down and the f5 is just 20 dB down.

[ggm]

The reply would be encoded in the one time stream the numbers station sends: you pick things like the Lincolnshire poacher up on another radio.

Btw, I think it was Russian not east German and possibly was over the horizon radar or a deadmans switch or something else: we need a /j for joke marking.