R1155 Receiver at radio-exports.com

A classic tube receiver from the WWII era,used by the British Royal Air Force, (typically, in the Lancaster Bomber) and designed as a companion for the T1154 Transmitter.The receiver provides communications and direction finding facilities.The receiver circuit uses 10 tubes.Several modified versions of the set were produced,such as the R1155A,R1155B etc.,which all embody the same basic circuit .Frequency coverage is 18.5 to 3.0 Mc/s,1500 to 600 kc/s and 500kc/s to 75kc/s,with the exception of Types R1155Land N which cover 18.5 Mc/s to 600kc/s and 500kc/s to 200kc/s.All versions have an IF of 560kc/s.In its original use the receiver obtained power from a rotary converter or from a transformer/rectifier for ground station use.Power requirements are 6.3 volts at about 4 amps and 230 volts at 70mA.A point to note is that in the receiver, HT negative is not connected to the chassis,but has a resistor interposed.Thus if HT negative is joined to chassis in the power supply and the receiver chassis touches the power supply chassis,the bias resistor will be short circuited (and damage will result!Simple solution-do not ground HT negative in the power supply).Audio output is 200mW into 5k ohms.Examples of the R1155 which have not been modified (typically by removal of the DF components) are increasingly difficult to find.However,the good news is that we usually have a good selection of sets in unmodified,original condition.The price guide for these receivers,which includes the cost of air freight to the U.S.A.,is $485 U.S. Dollars.