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GB1123498A - Improvements in or relating to radio transmitter-receivers - Google Patents

Improvements in or relating to radio transmitter-receivers

Info

Publication number
GB1123498A
GB1123498A GB3263866A GB3263866A GB1123498A GB 1123498 A GB1123498 A GB 1123498A GB 3263866 A GB3263866 A GB 3263866A GB 3263866 A GB3263866 A GB 3263866A GB 1123498 A GB1123498 A GB 1123498A
Authority
GB
United Kingdom
Prior art keywords
frequency
transmitter
july
receiver
plug
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3263866A
Inventor
Eric Brian Butler Callick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
G&E Bradley Ltd
Original Assignee
G&E Bradley Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by G&E Bradley Ltd filed Critical G&E Bradley Ltd
Priority to GB3263866A priority Critical patent/GB1123498A/en
Publication of GB1123498A publication Critical patent/GB1123498A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)

Abstract

1,123,498. Combined radio receiving and transmitting systems. G. & E. BRADLEY Ltd. 20 July, 1967 [20 July, 1966], No. 32638/66. Heading H4L. A V.H.F. transmitter-receiver is provided with an adaptor whereby it can be operated in a U.H.F. band. As described a transmitterreceiver normally transmits at 150 Mc/s and receives at 155 Mc/s and by removing the aerial rod from its socket and replacing it via plug 13 with the device shown in Fig. 2, it is converted to transmit at 450 Mc/s and receive at 455 Mc/s. When transmitting, R.F. oscillations from the V.H.F. transmitter are supplied via coupling loop 14 to a frequency-trebler 15 using a varactor diode or step diode in known manner. Signals received at the aerial 17 are supplied to a frequency-changer 16 co-operating with a local oscillator 18, the 155 Mc/s difference frequency being selected for application via the plug 13 to the receiver. The frequencychanger is powered by a battery 19 which may be charged by rectifying at 21 a portion of the transmitted R/F, or the standing current of a varactor diode used in the frequency-multiplier may be utilized.
GB3263866A 1966-07-20 1966-07-20 Improvements in or relating to radio transmitter-receivers Expired GB1123498A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3263866A GB1123498A (en) 1966-07-20 1966-07-20 Improvements in or relating to radio transmitter-receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3263866A GB1123498A (en) 1966-07-20 1966-07-20 Improvements in or relating to radio transmitter-receivers

Publications (1)

Publication Number Publication Date
GB1123498A true GB1123498A (en) 1968-08-14

Family

ID=10341757

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3263866A Expired GB1123498A (en) 1966-07-20 1966-07-20 Improvements in or relating to radio transmitter-receivers

Country Status (1)

Country Link
GB (1) GB1123498A (en)

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