Radio compass receivers,

Radio compass receivers from Bendix.

This direction finder receiver  MN 26 is in fully working condition. Also functioning as a communication receiver together with the TA 12 transmitter, just seen a bit on the right of the picture.

Above the MN 26 radio compass and below the RA10DB receiver.

Seen at the picture the following items;

MT51-C remote control for the Transmitter TA12-B.

MR9 frequency control box for the RA 10 DB receiver.

MN28-LB control box for the MN 26 receiver.

Direction finder loop antenna MN20-E.

DF Receiver R10-DB.

The Ra 10 DB  DF receiver above, the MN 26 -E below in the picture.

The azimut controller of the MN 26 , indicates the direction of the beacon transmitter, figured out by the compass receiver MN 26. The way of polling happens mechanical by a bowden cable attached to the azimut controller.

Note, that the RA 10 DB is not only a radio compass, but also a communication receiver, togethet with the transmitter TA 12.

DIRECTIONFINDER RECEIVER MN 62.

The MN 62 is the the civil implantation of the late ARN 7 radio compass receiver. It needs 115 volt 400 Hz and 24 volts DC.

The direction finder MN 62.

The remote control box of the MN 62 for the operation of the receiver.

Aircraft receiver type RA1-B.

This receiver is a real old fashion general coverage receiver. Alle the wave bands are close after each other, when turning the wave band knob. When turning and  reaching the end of the last waveband, you start again with the beginning of the first.

It was used for communication purpose, but also for direction finding. It is a wartime receiver. But also used after the war by the dutch KLM.  It is a real nice, sensitive receiver, pretty stable in frequency at CW/SSB, only  a bit broad medium frequency stage of  1, 6 Mhz. But receiving SSB signal is pretty possible, if the band is not to busy with other stations.

 Bendix RA1-B.

A

Here the 2 original bowden cables for remote controlling the MR-1B.

When I obtained this remote control, together with a RA-1J, it  appeared to be a postwar (?) revision belonging to that  RA-J. The RA1-J was a revised postwar (?) one, because it had an extra mode swtitch on it’s front. Three positions: CW, VOICE and RANGE. This switch was also located at. the front of the  MR-1B. Watch also the missing switch : AVC on/off. The both potentiometers inside  were removed.

I decided to modify it into an original MR-1B, suitable for my original wartime receiver RA-1B.

Does anyone knows, which manufacturer it was, who carried out that revision?  Also what year, and in what aircraft is was being used.

I’m most grateful for more information. Pse let me know in the comment at the end of this post.

Finally the restored ware time MR-1B. When the function switch at the front of the receiver is set at “remote”, all the facillities are available on the MR1-B. Like band switching, frequency control, CW oscillator on/off, AVC on/off, audio and volume control.

At the right of the box, you can see the connector and cable to the remote entrance on the receiver.