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In Reply to: Re: I just bought a B&K ST-140 for $4. I have a couple of questions about it. posted by Mike B. on April 10, 2007 at 11:56:16:
OK, will do. I just need to get over to radioshack and at the very least get a voltmeter. I might wait on the variac until after I open it up and poke around. Thanks for the tips!
Follow Ups:
yes, you need a multimeter to check fuses and DC offset. I will venture a wild guess that the amp was so cheap because it has major problems. The output devices on the older models are available out of Great Britain. You can do a search at the tweaks asylum. Search all the way back to 1999. This amp was discussed heavily around that time. I highly recommend you limit your testing of interior components to the period before ever plugging the unit in. The two large filter caps can store enough energy to kill.
I am incredibly happy to say that your wild guess seems to be wrong for the time being! I set it up with some junk speakers and I am playing it right now. Seems to work perfectly!
Ok, well it has already been plugged in and powered up, and it started up with no fireworks or funny sounds. I will just open it up and look, not touch. Unless there are blown fuses. I would guess that you are correct, although I from what I can tell the people working at the thrift store had no clue what it was and did not test it because it had no power cord. Hopefully it works, but for $4, not much lost.
That was a very nice amp in its day and holds it own against some of today's amps. Smooth and reasonably powerful. You may wanna check audiogon or ebay for matching preamp(s) which were also pretty good.Great find! I love thrift stores.. I bought a set of Mizuno MP-29 irons (golf clubs) for $3 and sold them to a local used sporting goods store for $100 the same day. woo-hoo!
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