[Milsurplus] RDF on WW2 aircraft

[J Forster]

I'm virtually certain that there is no relay in the MN-26 and RA-10 series
loops. In those systems there is a special cable with armor and over braid.
There is no loop relay in the MN-26 and I've never seen a provision for an
external relay box in either system. There is an optional loop relay on the
front of the RA-10, but it's to choose between antennas not serve a T/R function
and is controlled by a switch on the loop azimuth control box. In fact, the
difference between the MN-26 and RA-10 azimuth controls is the former has one
toggle switch, the latter two.

I suspect, but don't remember, that the long wire antenna input has a neon bulb
as part of a limiting circuit.

-John




Hue Miller wrote:

> On aircraft with both an RDF of the MN- or BC- series, and a liaison HF
> transmitter, or should i say, LF-HF transmitter, more accurately, did the
> RDF have a relay to ground the loop input during transmit periods, or was
> the RDF completely independent? If independent, could the RDF be used
> while transmitting, on HF ?  Or would it be desensitized ?  Tnx - Hue Miller