K7000 Velleman Signal Tracer Active Probe Download Circuit Information:
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Today on the show I will be demonstrating how different types of volt meters can have a big effect on the circuit under test and the reliability of those measurements.
We will then have a look at the Velleman K7000 signal tracer and build at active FET probe that will really extend the capabilities of the signal tracer and make it work very much better
This signal tracer /injector has been designed to inject or detect a specific signal into an audio circuit in need of repair (such as amplifiers, radios, tone controls, ...) so as to detect the fault. In this way problems can be traced more easily. The signal tracer may also be used as a simple monitor or amplifier.
DVM Meter Impedance Thread:
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Active Probe Miller Effect Discussion:
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Specifications :
Output power: 0.5W / 8ohm
Power supply: 7-9VAC or 9-12VDC / 150mA
Dimensions: 60 x 53mm (2.4" x 2.1")
Injector:
0-2.5Vrms output (adjustable)
Output impedance: 1.5Kohm
Frequency: ± 1kHz
Tracer:
3.5mV to 10Vrms sensitivity (adjustable)
Gain: 40dB
Input impedance: 50Kohm
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