standard: R1082 (R 1082);

ID: 128815
standard: R1082 (R 1082);  
23.Dec.06 14:35
0

Bo Samuelsson (S)
Articles: 23
Count of Thanks: 7
Bo Samuelsson

STC R1082

The receiver R1082 was designed in the middle of the 1930s by STC (Standard Telephone & Cables), and was used together with the companion transmitter T1083 in early versions of light and heavy bombers like the Fairey Swordfish and Battle, Handley Page Hampden, Armstrong Whitworth Whitley, Vickers Wellington and the first fourengined bomber, the Short Stirling. The R1082/T1083 were eventually replaced by the R1155/T1154 in the beginning of the 1940s.

At the outbreak of the war in 1939, the R1082/T1083 together with the TR9 were the dominating radio systems in the Royal Air Force, but they were already obsolete at that time. They were also used in sea rescue vessels and after being phased out of the aircraft they were used for ground communication.

According to a reader of Radio Bygones working as a post-war radio mechanic the R1082/T1083 were still used in Ansons and Oxfords as late as in the beginning of the 1960s!R1082/T1083 were also used by the Australian and Canadian air forces. In Australia a slightly redesigned and not very reliable copy was made, designated the AR14/AT10.

Receiver Data
The R1082 is a simple straight regenerative receiver with 5 valves plus a protective diode across the antenna input. The first stage is an RF amplifier pentode, followed by a triode detector with positive feedback, two AF amplifier triodes and another triode as AF output stage for headphones. The equipment also provides intercommunication for the crew.

The receiver covers 111 kHz to 15 MHz in 14 bands with interchangeable coils, and it can be used for CW and R/T. The coils come in pairs, aerial (input) coil and anode coil for the RF stage. For full frequency coverage there are 28 coils in a special carrying case. The lower frequency bands can be used for D/F (direction finding), using a D/F add-on and a loop aerial.

The receiver is a two-hand device with one hand on the tuning knobs and the other on the feedback knob, and it needs a skilled operator to do a good job. The operators made their own calibration charts for each individual receiver they used.  The positive feedback is inductively coupled from the detector output to the RF anode coil. The degree of feedback is regulated with a potentiometer changing the RF gain. Close to the self oscillation point the positive feedback gives a very high gain. The receiver sensitivity is 25 uV for 5 mV output into 20 kohm.

In the aircraft the receiver was fed by a 2 V 20 Ah lead acid ackumulator for the LT, current 1.15 A, and an anode battery giving 120 V HT, current around 13 mA. The receiver measures 27 cm x 29 cm x 23 cm (w x h x d), and the weight is a little under 7 kilos with coils.

My Receiver
The R1082 receiver has the model number 10D/8415 and my receiver has the serial number 15589. I recently bought it on eBay. According to the seller it was bought as military surplus after the war by a  science teacher (probably with some connection to the RAF in WWII), and he used it as a demonstrator at his school when teaching radio. It was then taken over by one of the pupils in 1965, and it was last used around 1975.

The receiver is in its original condition, no changes at all have been made, and no restoration will be needed except a check of the components and a final check. Coils D, E, F, K and L were delivered, (together with some spare coils for these bands), covering the frequency bands 470 - 785 and 785 - 1200 kHz, of which the lower one has coils for D/F, and 4000 - 8500 kHz.

More details and pictures can be found on my home page http://goto.glocalnet.net/bosradio  .

 

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 2
standard radio  
23.Dec.06 21:44

Maitiu Standun (IRL)
Articles: 160
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Maitiu Standun

hi bo , i have in my possession a standard radio in a black aliminium case , s.t.r.9x2 c of a wr421  ser no1221.

its fitted with two tuning spindels with 8  sliding gangs on springs that appear to be operated  electronically through cable connectors from another unit , it has a 24v socket and an aerial socket , and thats about it .12 little cv 21 valves a mullard and a monster valve [tube] cv 420 ,  there are also air filters at one end of the case like filters that are used for the breathing system on a diesel engine , [ also a pecular oily smell],

one spindle has rec and the other has trans marked on , maybe u might be able to shed some light on this item , [ theres also the logo of an aircraft in blue on the case ]looking forward to hearing from u , regards maitiu standun.,

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 3
 
26.Dec.06 19:14

Bo Samuelsson (S)
Articles: 23
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Bo Samuelsson

Hi Maitiu, sorry  om, I have no idea what it is, and searching the internet just returns your forum requests again! Hope you had a Merry Christmas and a Happy New Year to you.  Bo S.

 

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 4
 
27.Dec.06 03:11

John Turrill (GB)
Articles: 82
Count of Thanks: 5

Matiu,
not sure (like Bo) what your instrument is, though some clues are
the CV21 valves (Mazda VP41 vari-mu pentode), and the CV420
cathode ray tube (VCRX277) suggesting it may have been some
kind of navigational beam indicator (like LORAN) from WW2 or
shortly after.
Happy New Year (and to all),
                                                    John.

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