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Sound Technology 1500a Tape Recorder Test System (audio)

US $495.00

Anaheim, California, United States
Jan 29th

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Sound Technology. ST 1500A Serial 124-03201. Options 007/009 SC-19 Tape Recorder Test System. From a blog.> I attended a seminar at ATR Services a few weeks ago and used the 1500a to go through everything that needed to be measured and aligned on the ATR 100 machines that we worked on. Mike Spitz said they replaced an entire bench of electronics gear that any one needed to tune RTR machines. They have eight of them and he commented that Sound Technology charges $800 to re calibrate each unit. He mentioned that he saw one on ebay for $495 a while back. The ST 1500(A) is an versatile piece of audio test equipment that although designed for tape recorder (and turntable) testing can be of more general use. It incorporates a low distortion sine wave generator that can output a signal from 20hz to 40Khz (up to 2 VRMS). Older machines can measure 2nd and 3rd harmonic distortion (HD) at 1Khz only - newer machines can measure HD at 315, 333, 400 or 1000hz. It can measure noise and channel separation to better than 90dB. Wow & Flutter. Of course various weighting contours are available when making noise measurements. The spectrum analysis option adds third-octave distortion component display capability. For tape recorder analysis the machine incorporates a unique 3-tone azimuth measurement, along with flutter and noise measurement (with the optional third-octave display). A very useful feature is that it can display record/play distortion while automatically "stepping thru" input levels from +10 to -20dB. ST also supplied a "TR150 test record" LP for testing and setting up cartridges and turntables. FYI. I will give you a EM-X90 Calibration, Test Cassette Tape with the sale. You need the accompanying test tape especially for playback setup. It has the level set tone, azimuth adjust and synchronized frequency response sweep(s). Fortunately, Magnetic Reference Labs (MRL) can supply the tapes. They are expensive, around $100, and are offered for only one speed and equalization (NAB/IEC). Not needed for 3 Head Reel to Reel and cassette tape machines.\ I ran a quick test as you can see, everything looks like it should. I cannot warranty this item, other than to say its seems to be working correctly, nice display, good actions on all of the knobs and buttons. Nice unit.