The only time I tolerate distortion is when I'm designing custom distortion stages for guitar amps. Otherwise, for your critical studio / home repairs, I have made the shop an electrical quiet zone. Maximum electrical noise in the shop is -116dB. My distortion analyzers have a background distortion of 0.00093% IMD ( SMPTE standard) and 0.0011% THD. For high end home listening and Critical Studio recording, your gear will sound like it's supposed to.
Shop noise floor
Gear list:
Amber 3501 Distortion Analyzer 0.00093% IMD (SMPTE standard), 0.0011% THD, for distortion testing and ultra low distortion signal generator.
Sencore TF 151A For gain testing transistors and gain matching.
Tektronix 465B Oscilloscope Waveform Viewing
Brunell Function Generator Multiple waveform Generation.
Virtual Instruments Spectrum Analyzer Distortion, noise floor analysis and engineering.
Stark 9-66 Tube tester Complete gm and noise testing, old school!!
BK 667 Solid state tube checker Tube checking.
Hewlett Packard 200CD Oscillator Vintage tube based oscillator.
Hewlett packard 6255A
dual power supply Low noise power supply for in-shop testing of plug in cards and amplifier design.
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