thecodemachine.co.uk · 2018. 4. 12. · the main receiver tuned to 600 kc/s as an l. F. amplifier)...
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thecodemachine.co.uk · 2018. 4. 12. · the main receiver tuned to 600 kc/s as an l. F. amplifier) gave eight possi- ble combinations. Any of these could be equipped with a suitable