Quote:
Originally Posted by David Dunlop
Posts 592/593 is a VERY hard to find RCA AR88 Loudspeaker. It is only rated at 2.5 Ohms. This was a late production run for Canadian and British Contracts as it had the Pocket Watch Holder predrilled and capped off so one could be added if needed. Earlier versions lacked that feature. The AR88 Series of receivers were a very highly regarded Intelligence Gathering piece of kit still in use in remote northern areas of Canada well into the Cold War Era.
You would be better off sticking with the Gunnery Speaker designed for the 19-Set/Tannoy System.
David
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Control Unit 190 (as used in the Sexton 25pdr SP Gun installation) is intended to drive a Tannoy speaker (with transformer) direct, so that's probably the way to go - the circuit diagram should exist in one of the EMERs. (FZ256/3 has the exploded view but not the circuit diagram of the 190 box - it's possible they used the IC amplifier as a driver for the speaker rather than use the 6B8 'A' set output stage.)
Best regards,
Chris.
Chris.