GBR - TR 1143 (Letecká radiostanice)

Radio station TR 1143

The TR 1143 VHF (UHF) radio transmitter/receiver set was used in the RAF for fighter aircraft, and after the war made its way - along with the "Spitfire" and "Mosquito" aircraft - into our air force.


It operated on frequencies in the 96 - 126 MHz band, controlled by crystals with the possibility of 4 channel tuning and remote switching.
Power 6W.


The alternative, indistinguishable at a glance TR 5043 had a frequency range of 100 - 150 MHz and corresponded to the US SCR-522.


Source: "They wouldn't fly without them" - World of Wings 2008

MNO - HŠ - VL issued 9.10.1946 no 9162 Taj. let.1946 "Flight control - organization of connections".
According to it the "tuning" of VVF radios was determined (LR 16 as VVF I, TR 1143 as VVF II).
-
VVF I - LR 16/FuG 16:
(Tuning channels I, II, Δ, )


I :39,5 Mc/s
II :40,8 Mc/s
Δ (delta)42,3 Mc/s
 (quadratic)


-
VVF II - TR 1143:
(Tuning channels A, B, C, D)
A (6860)124,28 Mc/s
B (-)
C (6630)
D (6510)
(Crystal numbers in brackets)


The radios were controlled by crystals (actually there were 4+4 = 8), numbered in the series 6xxx, with a specific number for each of the frequencies.(Each rdst had 4 crystals for the transmitter e.g. "A" 6860) and 4 crystals (for the receiver ("B" 6860) - so the same number.


The "A" channel with a frequency of 124.28 Mc/s (MHz) was then designated for the operation of "dispatch" (air traffic control) correspondence.


REMINDER:
This is a "quotation" from that regulation and gives the frequency designations for the radio stations then in use.



- Our Air Force high command in the immediate post-war period did not know which direction the Signal Service - that is, the VHF/VHF frequency bands - would evolve.


In the spirit of the agreements and within the framework of the Košice government program, it was to be like the Soviets...
It was awaiting a "decision" whether it would be "German" (38 - 42 Mc/s) or "Western" (100 - 150 Mc/s).


Source.