Hi folks. I picked up an SX-828 maybe 5 years ago, and it had the usual low filter pop issue. I knew very little about repair at the time, and some folks on here walked me through it. I replaced the caps but managed to detach a ground wire and lost a channel. It turned out the channel wasn't due to the wire, but was due to me accidentally bending one of the A725 transistors on the tone board and shorting it out. I replaced that (backwards, as it turns out), but managed to snap one of the 33k resistors next to it. I gave up on it and put it away until I felt like dealing with it.
Flash forward a few years, and I picked up another SX-828 on Craigslist. This one works fine but all of the lever switches are worn out, in that they will not stay up--the springs are either broken or worn out. The previous owner had desoldered two of the switches and then given up. I started working on acquiring replacement switches but put this one aside too.
Then a few months ago I picked up a parts SX-828. This one is missing the knobs and has a busted antenna mount, but is otherwise complete. No idea if it works, but probably not.
I figure between the three of these I can put together two working SX-828s without difficulty. I have fully rebuilt (other than the tuner sections) two SX-636s, an SX-535, an SA-7100, and an SX-950 over the last few months, as well as servicing an SX-939. My plan is to start with the first one, get it working first, then rebuild the boards. Then I'll put together a working one from the other two. I didn't see a full recap/rebuild thread on here, but I saw a few repair threads, and it shouldn't be that hard to figure out what to do. Any suggestions or things I should pay attention to? Are there properly-sized main caps out there at all, or should I just put in smaller ones and pad them with foam?
Flash forward a few years, and I picked up another SX-828 on Craigslist. This one works fine but all of the lever switches are worn out, in that they will not stay up--the springs are either broken or worn out. The previous owner had desoldered two of the switches and then given up. I started working on acquiring replacement switches but put this one aside too.
Then a few months ago I picked up a parts SX-828. This one is missing the knobs and has a busted antenna mount, but is otherwise complete. No idea if it works, but probably not.
I figure between the three of these I can put together two working SX-828s without difficulty. I have fully rebuilt (other than the tuner sections) two SX-636s, an SX-535, an SA-7100, and an SX-950 over the last few months, as well as servicing an SX-939. My plan is to start with the first one, get it working first, then rebuild the boards. Then I'll put together a working one from the other two. I didn't see a full recap/rebuild thread on here, but I saw a few repair threads, and it shouldn't be that hard to figure out what to do. Any suggestions or things I should pay attention to? Are there properly-sized main caps out there at all, or should I just put in smaller ones and pad them with foam?