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Bob wrote:
I'm looking for the schematic of the old Archer "Space Patrol" walkie talkie or similar. I think this tpye all used a very similar circuit with a superregenerative rx that used the same stage as a non-crystal controlled oscillator on tx along with a 2(?) stage audio amp. A lot of companies in Japan made these things, and they all copied one another in much the way Chinese manufacturers do today. Here's a typical design: http://yb3td.com/data/walkietalkie.html As I recall, the Archers that I had as a kid were crystal-controlled for transmit but used an adjustable LC network for receive tuning. I remember moving one to 10M at one point but the audio quality was very bad and of course there was no squelch... --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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