Remote thermometer (CB9487E)

We found this circuit in a 90s Linear Technology documentation. The circuit uses components from the time and the indicator is of the analog type.

| Clique na imagem para ampliar |

RF Stage (CB22022E)
This common gate circuit for the 13 to 30 MHz band was found in old English documentation....
Battery Monitor (CB6398E)
This circuit was originally found in a Philips documentation from 1969. It is intended for sensing...
Voltmeter with FET (CB13657E)
This FET voltmeter is from an old 1974 amateur radio publication. The circuit can use MPF102 or...