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Datasheet BF173 Micro Electronics

Click to enlargeFM Radio Receiver
This simple fm radio receiver circuit consists of a regenerative rf stage, TR1, followed by a two of three-stage audio amplifier, TR2 to TR4.

Click to enlargeRegenerative FM Broadcast Receiver
I must admit, at first I was sceptical looking at the circuit diagram, a single 1.5 V cell supply? But after a quick check of the audio stage bias with my calculator I saw that Mr Hall had designed it well, so I dug out the solderless breadboard and made up the audio strip. It "blurt" tested OK, and was surprisingly quiet and well-behaved (I used BC548B devices).

Creation date : 23/11/2013 @ 20:42
Last update : 07/10/2015 @ 12:18
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