A simple DIY radio zoo
On the Internet, you can find a huge number of circuits radio circuits. Some schemes are too complicated and require adjustment, others include defective radio components, and others do not work at all! I bring to your attention a scheme of a bug, which can be assembled by both an experienced radio amateur and a beginner in this business. Let's consider this scheme:We put the board in the solution and wait until the extra copper disappears. After the board is removed, we remove it, rinse it with running water, remove the varnish and lud m of it:Next, we solder the parts in accordance with the scheme. Attention, when installing parts on the board, do not overheat them, otherwise they will fail! Especially neatly refer to the installation of the VT1. I want to say a few words about the antenna connection, the signal is fed from the emitter of the transistor, which makes the bug's working frequency more stable. The schematic in assembled form:
>img src="https://sdelaysam-svoimirukami.ru/images/19/919-prostoy-radiozhuchok-svoimi-rukami.jpg" alt="simple radio fly with your own hands" title="simple radio fly with your own hands">Do not pay attention to the dotted line. To make a bug, we need the following details:
- VT1 - kt315 with any letter index (if you want to increase the range the actions of a bug, it is better to use a microwave transistor, for example kt325 or kt368, the import transistor s9018 is perfect);
- C1, C4 - 47… 68nf;
- C2, C3 - 10pf;
- R1 - 33 kOhm;
- R2 - 100 Ohm;
- Oscillating circuit L1 - 8 turns of copper wire with a diameter of 0.3 ... 0, 5 mm on the helium pen rod, shake gently,(I dropped a finished coil from a broken radio).
- M1 is an electret or condenser microphone.
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