RF power meter (CB8977E)

This reflectometer or standing-wave ratio meter (SWR) was found in a 1980s American documentation. The diodes support general purpose equivalents.

| Clique na imagem para ampliar |

230 to 2.8 kHz Adjustable High Pass Filter (CB12571E)
The cut-off frequency of the filter shown in the figure can be adjusted to values between...
Burglar alarm (CB7428E)
This circuit was found in a Popular Electronics from the 90s. The components used are all common...
MOSFET RF Oscillator (CB19562E)
This circuit uses a dual floodgate MOSFET not very easy to obtain today. Its handling is very...