Re: Improving Selectivity In Vintage Receivers
2N4391 2N4392, 2N4393 a set graded in Idss and Ron. Quite high current beasties. Used by Marconi in some of their better transistorised receivers. HP used the 20 Ohm one as an analogue switch.... rather a good one. It also does high dynamic range RF work as an amplifier. Bit pricey now, inevitably.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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