Modification of A-1134A for use with low-impedance telephones.
| RAF Intercom Amplifiers Click on the image for full size view! |
| A-1134 | |
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| Purpose | Air crew inter-communication.
Modulation pre-amplifier and receiver output amplifier.
Output to maximum of seven pairs of telephones. Switching gives
various combinations of communication between operator and crew. Modification of A-1134A for use with low-impedance telephones. |
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| A-1219 | ||
| Purpose |
Replaces A-1134 for inter-communication when T.R.1133
installed. Sub-modulator for electro-magnetic microphones. |
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| A-1271 |  |
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| Purpose | Beam-approach amplifier for use with TR-1133, TR-1143, TR-1143A and TR-1430 installations. The marker beacon signals are received on aerial system, Type 62; they are detected by a diode valve and the modulation frequency is fed via the AF amplifier. Type A-1271, to the input circuit of the Intercommunication amplifier embodied In the VHF equipments | |
| Frequency | Modulated frequency of 700 c/s or 1.700 c/s | |