Hello, AK Land,
I just finished up recapping (and retransistoring, and redioding) my dad's old SX-939 he and I bought locally off Craigslist four or five years ago. Five years ago? We might as well be living in another world now, LOL.
I bought three kits off eBay from a seller who refers his customers to this website - peace.love.and.music I believe the name is. I got a power supply/protection kit, a phono (phono equalizer) kit, and a preamp kit. I think this seller also sells the big pairs of power supply filter caps and a replacement relay for the 939.
I did not buy either of those, only because the original relay still works fine. Also I already had a pair of capacitors for the power supply. The originals are 50v 10,000uf. I'm using a pair of caps from a ten-year-old DENON A/V receiver, 63v 12,000uf. Probably not the greatest idea in the world to use old capacitors since they don't age all that well, but hey, I knew exactly how old they were and I knew they never saw that much use to begin with.
I use that A/V receiver for spare parts; it got dropped and damaged while moving and got nearly destroyed, several cracked PCBs on the inside. I've been slowly parting it out forever now. LOL.
Since the newer power supply filter capacitors are smaller in diameter, I had to wrap each one in duct tape to get them to match the diameter of the originals. Just a thin strip of tape wrapped about ten times around did the trick. Those capacitor clamps work perfectly. Duct tape, how embarrassing.
Anyway, it took several days on and off to finish the job. My 939 had several soldering pads come loose that nearly broke free from the board. I've never had so many soldering pads come loose like I did on this receiver. I'm not the world's greatest most careful soldering guru, but dayum... like five or six? I hate that.
Everything went smoothly; this time I only put half the transistors in backwards, instead all of them... LOL
When I got done and had it running, I flipped the tone switch on and the sound went dead in both channels. I traced the problem back to yet another transistor that I had put in backwards, this one on the power supply board. So after that bit of a scare, and a quick fix, I had it running perfectly.
I knew this receiver sounded good back before when it was still stock, with all its old noisy-as-he(( transistors, but wow, just wow! The AK members who claim this receiver and the SX-1010 sound great are not kidding around. This baby sounds fantastic!
I like these vintage audio gear rebuild kits that have been popping up all over eBay. It saves me the headache of having to come up with a BOM on my own. Like I know which capacitor is the correct one to use...
I just finished up recapping (and retransistoring, and redioding) my dad's old SX-939 he and I bought locally off Craigslist four or five years ago. Five years ago? We might as well be living in another world now, LOL.
I bought three kits off eBay from a seller who refers his customers to this website - peace.love.and.music I believe the name is. I got a power supply/protection kit, a phono (phono equalizer) kit, and a preamp kit. I think this seller also sells the big pairs of power supply filter caps and a replacement relay for the 939.
I did not buy either of those, only because the original relay still works fine. Also I already had a pair of capacitors for the power supply. The originals are 50v 10,000uf. I'm using a pair of caps from a ten-year-old DENON A/V receiver, 63v 12,000uf. Probably not the greatest idea in the world to use old capacitors since they don't age all that well, but hey, I knew exactly how old they were and I knew they never saw that much use to begin with.
I use that A/V receiver for spare parts; it got dropped and damaged while moving and got nearly destroyed, several cracked PCBs on the inside. I've been slowly parting it out forever now. LOL.
Since the newer power supply filter capacitors are smaller in diameter, I had to wrap each one in duct tape to get them to match the diameter of the originals. Just a thin strip of tape wrapped about ten times around did the trick. Those capacitor clamps work perfectly. Duct tape, how embarrassing.
Anyway, it took several days on and off to finish the job. My 939 had several soldering pads come loose that nearly broke free from the board. I've never had so many soldering pads come loose like I did on this receiver. I'm not the world's greatest most careful soldering guru, but dayum... like five or six? I hate that.
Everything went smoothly; this time I only put half the transistors in backwards, instead all of them... LOL
When I got done and had it running, I flipped the tone switch on and the sound went dead in both channels. I traced the problem back to yet another transistor that I had put in backwards, this one on the power supply board. So after that bit of a scare, and a quick fix, I had it running perfectly.
I knew this receiver sounded good back before when it was still stock, with all its old noisy-as-he(( transistors, but wow, just wow! The AK members who claim this receiver and the SX-1010 sound great are not kidding around. This baby sounds fantastic!
I like these vintage audio gear rebuild kits that have been popping up all over eBay. It saves me the headache of having to come up with a BOM on my own. Like I know which capacitor is the correct one to use...
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