Re: ISB Receivers
Cathodeon
Plessey
Salford Electrical Instruments (a subsidiary of GEC)
ITT
Crystal Electronics
There were loads of firms into 1.4 MHz crystal filters. I have quite a collection! USB, LSB, vaarious CW and RTTY bandwidths as well as carrier recovery filters. Tons of them cropped up on the surplus market.
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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