Triplett Fox & Hound 3 – PN: 3397 - Manual (Page 8)

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5.1.5: Visual Continuity:
LED lights when continuity is established
Open Circuit Voltage: 10v max.
Test Current: 35mA max
5.1.6: Talk Power:
Open Circuit Voltage: 10v max.
Current (Short Circuit): 35mA max
Current with 1K Loop: Typically 6mA with new 9v battery
5.1.7: Protection:
Will withstand 56V with 400 Ohms series resistance applied
across outputs. Will withstand 175V peak with 100 Ohms
series resistance, superimposed on 56V, for 100mS (stan-
dard telco “ring” signal). DO NOT CONNECT TO LIVE AC
POWER LINES.
5.1.8: Power:
Battery:
Standard 9v Alkaline Battery
(NEDA 1604A, Eveready 522)
Battery Life: Approx 500 hours continuous in
Tone Generator mode
Telephone Line Powered Operation:
Tone Generator operates without 9v battery
installed. Operates from standard telephone
line (46 to 53v, 400 to 1800 Ohms) in
normal or reverse polarity.