|
diyAudio Member
Join Date: May 2004
Location: Vancouver Island
|
Not actually a dumpster, but around here some people believe in allowing natural forces to reclaim discarded materials. In other words, they drive into the woods on old logging roads and dump stuff because they don't want to pay the fees at the garbage dump.
I rescued a Sony SA-WG99 powered subwoofer that was sitting beside a power line trail yesterday. It had been there long enough for a few beetles and a slug to move in, but the 8" woofer is intact, and the particle board cabinet hasn't turned into porridge. I found a service manual online; the amp module is a Sanyo STK404-130S on +/- 51.6V rails. In this application it's rated 150W/6 ohms/10% THD. (Replacement modules (if I need one) are less than $10 at Pacific Semiconductor; there's a pin-compatible -140S with a higher wattage rating.) While the power supply isn't impressive, the protection circuits control an output relay and a cooling fan, which is more sophistication than I expected.
Once it has dried out, I'll smoke test. If working, I'll see if it's good enough for a "better than nothing" surround system. Maybe I'll add a way to bypass the input bandpass filter to allow full range or at least a lower cutoff, and a jack or binding posts to allow using a separate sub cabinet, replace the 1N5402 rectifiers with a '2502 bridge, and add more filter caps. I could end up with a complete, if not matching, 5.1 set of speakers for under $40. ($25 Mission fronts, $6 Energy rears, $5 Energy center, and a free sub.)
There were a couple of soggy 3-way Sears speakers there too, with intact rubber surrounds. I'll go back with a knife and save those.
Just about every bike ride I've done in the woods around here, I find something "useful".
|
. The staff in the recycling centre were not very pleased with me but I consider this "purist" recycling 
