Labels:bulletin board | crt screen | lemon | monitor | scauper | sky OCR: A SCALE RF SPRING HOT WIRE TURN AROUND DRUM (B) HEATER COUPLE DC mA RF (C) 1N34 ETC 100 H 10k HF : TO 20 0.01 0.01 0-50A TOROID TURNS Figure 4 RF ammeters. A Hot-wire ammeter measuring the current by amount of elongation of a wire heated by the current Liable to damage by shock, or too high current Thermocouple ammeter, which pro- duces a small DC current by measuring the temperature of a wire heated with miniature two-metal thermocouple. Liable to damage from excessive current. Very good as calibration standard. Transformer ammeter measuring the voltage induced in the secondary the current in the one- -turn primary winding Now the most popular RF ammeter
