Roll your own I F transformers.
AM RADIO
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Superheterodyne Mediumwave Radio
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10 Amplitude Modulation Signals and Circuits
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Radio Transistor Oscillator Transformer Coil RED IF 455 kHz CAN 10mm LOT 4 PCS | eBay
How to Align Receivers, October 1954 Popular Electronics - RF Cafe
AM Radio Receiver Using the NE602 Balanced Mixer"
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The Current State of Radio Design
Winding coils of buying coils.
Servicing R.F. Coils, June 1940 Radio-Craft - RF Cafe
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Antique Radio Forums • View topic - Sanyo 10S-P10 alignment...how to do..
AM Superhet Radio - lucsmall.com
AM RADIO
