This an old commercial receiver found in a year 1958 magazine. The circuit uses some transformer available that timer and the transistors are germanium types. The circuit is intended to receive MW stations.
Wired to the output of any amplifier this circuit makes an incandescent lamp flash according the...
Great sensitivity for the circuit can be obtained with a Darlington amplification step for the...
This Philips circuit of the 70's makes use of components of the time. The DZD40 is an uncommon...