Vintage Receiver

[BPRJam]

I just got a Pioneer Sx-1010 from an aquaintance who was going to throw it away.

It works, but has a crackle in one channel, and the channel balance seems off - though the two are likely related.

I want to mod it, but I don't have the time nor the energy to do the research myself into how to troubleshoot and mod the thing. For instance, I suspect that some of the transistor pairs no longer match, but what transistor part number do I replace them with? What do the trimpots adjust? With what values do I need to replace the electrolytics? Etc, etc.

Does anyone know of a forum that would be willing to answer (or has already answered) lots of questions about refurbing a SX-1010?

BPRJam

 

[rickcr42]

The DIY Forum links section is you bestist buddy

 

[dbwinger]

You should check out audiokarma.org and the vintage forum at audioasylum.com

 

[MD1032]

I joined this forum for some suggestions on how to fix up my SX-3700. They're great!

http://audiokarma.org/forums/index.php

 

[BPRJam]

I've found AudioKarma, but for some reason I can't join, and I can't do a search until I join.

Does anyone know why Audiokarma has locked out new people from joining?

BPRJam

 

[SiBurning]

Quote:

Originally Posted by BPRJam I've found AudioKarma, but for some reason I can't join, and I can't do a search until I join. Does anyone know why Audiokarma has locked out new people from joining? BPRJam

From the news forum on audiokarma dated September 26, 2005.

"We regret that our new member registration will be closed for a few days as we resolve some logistics issues. Thanks for your patience."

Not a great place to put it since you probably can only see the news forum if you're already a member.

 

[mono]

GIven the symptoms, I'd forget about "transistor pairs" for the time being and focus on the typical mechanical part- the balance and volume pots. Hook up a source with adjustable volume set VERY LOW, and the receiver set to that input with the volume pot wiper shorted to full volume setting (temporary jumper wires should suffice). Of course it goes without saying that you're working with a device with high voltage AC in it.

 

[BPRJam]

Mono:

Thanks for the tip. The volume pot was my first guess, too, but it doesn't seem to be the volume pot. I'm currently looking at the balance pot to see if it is causing the problem, but spare time is scare these days.

There is a speaker selection switch so that you can switch the amp between speaker pair A and B that I also suspect might be the source of the problems, but I haven't looked at it yet (again, the time issues).

BPRJam

 

[SiBurning]

caig deoxit?

 

[BPRJam]

I plan on cleaning it that stuff, but I'm all out. I just ordered some more.

BTW - does anyone know how deoxit works? (Aside from cleaning and lubing, that is.)


BPRJam

 

[fewtch]

Quote:

Originally Posted by BPRJam BTW - does anyone know how deoxit works? (Aside from cleaning and lubing, that is.)

What do you mean by 'how it works'? What it does, or how it does it?

 

[BPRJam]

Quote:

What do you mean by 'how it works'? What it does, or how it does it?

How it does it.

I've always wondered what sort of magic is being done inside the pot whenever I spray that stuff in there. Somehow I imagine something on the scale of scrubbing bubbles.

Hold up. I actually went out to the Caig website and read up on the stuff, which is what I should have done to begin with. My only remaining question is what it does with the oxides it ends up putting into solution. I'm convinced that a not insignificant amount of deoxit ends up drying in the pot, so do those oxides fall out of solution somewhere in the pot when the deoxit evaporates? I suppose if you squirt enough in there you can exect that 99% of anything in solution will be rinsed out, but still....

BPRJam