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SCR-619/BC-1335 (1943/4) was developed using the same technology used in the development of SCR-300/BC-1000 (1942/3). Conformities (Picture 1): Both use minitubes, both chassis look very much alike (The parts of the chassis dealing with tunability / fixed channels are different, of course- see pictures 5 and 7.) (Picture 2 and 3): Minitubes in combination with IF Caps look alike. (Picture 4): The battery of the portable BC-1335 is the same as BC-1000's battery Differences, deriving from the different usage: (Picture 5): BC1335 is not tunbable, but uses fixed frequencies, thus has a an alignment aid. (Picture 6): BC-1335 has a built-in magic eye, used for field alignment (Picture 7): The built-in power supply needs a filament and a HV regulation tube (gas discharge glow type.) ( The vibrator power supply of BC1000 (uses 6/12/24 V) also contains these regulations, but not the BC-1000 itself. As battery-operated radio it does not need it.)
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