Transistor Radio Am Radio Circuit Board. This item was assembled and tested ready to use. Coil l 1 consist of 100 turns of 40 swg insulated wire.
This is basic circuit of am radio inclued otl amplifer comes with the speaker as shown in the photo. Proper solder joints will last virtually forever. A small simple am receiver project with only 3 transistors.
I have several which i have clipped the leads and i m sure that doesn t help with the value.
Smallest radio circuit using two transistors. 2 9 subminiature power amplifier because of its simplicity this amplifier may be built on a board only 2 x 3 in size. Transistor radios contain hundreds of solder joints where the component wires meet the circuit board traces battery contacts switch terminals and so forth. 1 variable capacitor from an old radio o from radioshack store.
