This circuit was found in an American publication in 1966. The circuit uses a general-purpose FET that admits an equivalent. The instrument is a 250 uA full-scale microammeter.
Using a new Maxim integrated circuit (www.maxim-ic.com) the amplifier shown in the figure can be...
This modulator can be used in a data link or other signals up to 200 kHz. Range can be achieced...
Found in a 90s 73 magazine, this circuit uses an unusual component today which is the XR2206. |...