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Old 15th November 2004, 12:37 PM   #1
jmikes is offline jmikes  Canada
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Default Recommendations for test equipment

I'd like to buy sufficient equipment to test my speaker and crossover designs. What do I need and where can I find mid-price equipment?
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Old 15th November 2004, 01:47 PM   #2
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a soundcard -- for one thing.

a really nice instrument which sells for a song is the HP 3581 Wave Analyzer -- these sell for ~$50 and are always available on EBay. The HP3581 has 0.1uV sensitivity, a tracking generator, high and user-switchable selectivity, user-selectable tracking rates, etc. Dynamic range is 90dB -- so if you are doing distortion tests it isn't quite an Audio Precision item with 140dB of dynamic range, but you can make a 60dB passive notch filter and get really spectacular results. Occasionally these also show up via Canadian sellers so you will save on the post.

There is also Pen-Plotter output on the rear terminals -- if you have even a modicum of programming skills you can connect the pen-plotter output to an ADC card (like the MacDAC) and log the data on your computer.

A couple years ago when I broke my ankle (badly -- immobile for 3 months) I scanned and OCR'd the manual -- a few of the links need "repairing" but you'll get the basic idea --
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Old 16th November 2004, 06:54 PM   #3
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I fixed the links to the HP3581 Manual:
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Old 16th November 2004, 07:21 PM   #4
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Check out my post, might be of interest for you.
"If transistors are blueberries and FETs are strawberries, then tubes must be.. pears"
Michael 29th January 2010
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