Tom.. Ouch. But You had been posting about results with your 3577a - so how did it finish? Did You succeed in repairing it, or had to buy an another one?
George
I am mostly buying old Heathkit and Eico test equipment now and repurposing. The old Eico VTVMs are housed in a perforated steel chassis making them less susceptible to mains noise. Usually the transformers are pretty good. I have a version of Sam Groner's 400pV/RtHz low noise amplifier in an Eico box! Running off of Jan's silent switcher and some 18650's
I sold a fella a HP3577a and HP35760a -- he drove down from Boston to NJ to pick it up on a Sunday morning. Nice guy, ham radio etc., etc.
I sold a fella a HP3577a and HP35760a -- he drove down from Boston to NJ to pick it up on a Sunday morning. Nice guy, ham radio etc., etc.
I bought another one. This time, calibrated and from an outfit that specialized in used test equipment.
As for the comments about "calculated risk". That's true. You do take a risk when buying used, but I would argue that you can minimize that risk by going to outfits that specialize in used test equipment rather than dealing on eBay.
That said, there is some overlap between the two. I found many of the outfits I deal with through eBay listings. I've also sold known good test equipment there. It's a spectrum. Not a dichotomy.
Tom
Not sure about comparing DATSv3 to the others, but I like mine. Gives me good, consistent data, though I end up measuring VAS by multiple methods and using an average value, instead of relying on one method. (Box Size, MMs, Added weight, Sensitivity (db @ 1 watt))
I've learned not to believe any published speaker specs until I test it.
Six.