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Armstrong 224
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25-06-2023, 08:12 PM
(This post was last modified: 25-06-2023, 08:12 PM by Mike Watterson.)
I think the 223 also includes AM, basically by second IFT on each valve and 224 is FM only, so the 1st link is 224 FM only IF & detector and the 223 Schematic has the VHF section and PSU and extra AM bits.
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Armstrong 224 - by catch29 - 25-06-2023, 06:59 PM
RE: Armstrong 224 - by Mike Watterson - 25-06-2023, 07:49 PM
RE: Armstrong 224 - by Mike Watterson - 25-06-2023, 08:12 PM
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