Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => AmpTools/Tech Tips => Topic started by: kagliostro on March 09, 2009, 03:43:12 pm
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Assistance required I'm a novice in guitar amp lab instruments
Prease is this a useful instrument for guitar amp lab ??? a MUST to have one ???
I can buy for € 70.00
GW GAD-201B Distortion Meter
Distortion Measurements
Measure Range: 0.1% to 10% full scale in 7 ranges by auto ranging
Fundamental Frequency range: 20Hz to 20kHz 3 ranges continuous fine adjustment,3 spot frequency: 400Hz, 1kHz, and 10kHz±1% only
Input level: 100mVrms to 300Vrms
Fundamental Harmonic Rejection Ratio: 80dB above
Secondary Harmonic Accuracy: Within ±1dB at a basic frequency of 20Hz to 20kHz.
Residual Distortion: Less than 0.03% (including hum and noise)
Maximum Input Voltage: DC +AC peak, 400V or less
AC Voltage Measurements
Level measurement on AC voltage ranges: 1mVrms to 300Vrms full scale in 12 ranges by auto ranges
Decibel range: -60dB to +50dB in increments of 10dB; -60dBm to +50dBm in increments of 10dBm
Decibel scale: -20dB to +1dB (0dB=1V); -20dBm to +3.2dBm (0dBm=1mW, 600O)
Accuracy: Within ±3% of full scale (at 1kHz)
Frequency response: Within ±0.5dB, 20Hz to 200kHz for 100mV to 300mV ranges; Within ±1dBm, 20Hz to 200kHz for 1mV to 30mV ranges
Residual noise: Less than 10µV with input short circuit
Input impedance: 100kO±10%, 70pF or less (unbalance)
MANY THANKS
Kagliostro
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In a word - no. For Hi Fi it'd be good, but really guitar amps are all about the sound of distortion. You'd be far better served by a owning a signal generator and a scope. If you want to get into guitar amp distortion analysis, maybe a freq analyzer would be fun, but really its left up to the ears by that point. You can get pretty cheap or free freq analysis software if you use a PC based scope.
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THANKS
I saved € 70.00
Kagliostro