Radio compass receivers from Bendix.
This directonfinder receiver MN 26 is in fully working condition. Also functioning as a communication receiver in cinjumction with the TA 12 transmitter, just seen a bit on the right of the picture.
Here the MN 26 radiocompass and controll boxes.
On the picture the next 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.
Directionfinder loop antenna MN20-E.
DF Receiver R10-DB.
The Ra 10 DB DF receiver above, the MN 26 -E below in the picture.
The Azimuth controller , indicating the direction of the beacon transmitter, piled up by the compass receiver MN 26. The pile up is done by turning the controller by a bowdenkabel.
The compass receiver can be used for communications, with a transmitter, type TA 12.
DIRECTIONFINDER RECEIVER SCR 269.
The direction finder SCR 269.
The remote control box of the SCR 269.
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.
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 restaurated 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.
The RA1-B receiver at this moment, with mains powersupply, by lack of the original rotary transformer , stowed away on a shelve, far away of it’s remote control. Watch the connector with cable at the right to the remote control MR-1B.