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 Post subject: Sansui 1000
PostPosted: Aug Tue 07, 2018 5:06 am 
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Joined: Aug Tue 07, 2018 4:59 am
Posts: 3
I acquired a Sansui 1000 not the 1000a today and the on/volume potentiometer is completely detached from the chassis and not all in one piece. I don’t know if I can find a replacement part online or if I just need to snap it back together and jerry rig it to the front of the receiver again. The markings on it are centralab R2-500k. I also was wondering opinions on PIO capacitors? Lots of people say yes they all need to be replaced, but if I replace them with what type of capacitors should I replace them with? (Obviously the same values). Any help is greatly appreciated (I also have pictures but I’m new to the forum and unsure how to link them or imbed them. Message me and I’ll send them to you?)(Don’t know if messaging happens here either)


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 Post subject: Re: Sansui 1000
PostPosted: Aug Tue 07, 2018 1:47 pm 
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Joined: Nov Wed 07, 2007 12:44 am
Posts: 1884
Location: Hawthorne, Ca
Check with Mark Oppat at ****. He is the expert on potentiometers and has helped me several times when I needed a new control. Harry


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 Post subject: Re: Sansui 1000
PostPosted: Aug Tue 07, 2018 10:16 pm 
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Joined: Nov Fri 06, 2009 1:04 am
Posts: 2446
Location: Rochester, NY 14425
Just my thoughts and opinions here; all coupling and bypass capacitors should be replaced, along with the electrolytics of course. Ceramic and Mica are usually ok (but not always), and maybe stay away from shot-gunning the tuner section initially.

You can still find new PIO caps, but they tend to be expensive (relative) but would be sticking to original design. And of course it depends on your end goal, keep forever, fix and use for awhile, flip, restore & resale value, etc. Personally it'd be a keeper for me (very nice unit) and I'd work to restore to original. But you may be happy with the loads of film cap options out there. If you have a finely tuned ear (not like mine), there are reported perceived differences between caps. As you will undoubtedly find on other audio forums, the topic of film caps will be broad and wide, heated and nasty, and confusing... but you have options and not many would be bad.


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 Post subject: Re: Sansui 1000
PostPosted: Aug Wed 08, 2018 12:32 am 
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Joined: Jul Fri 18, 2008 10:02 am
Posts: 2089
Location: near ST Louis Mo 62002
This receiver has a history of the volume control going open or way High and becoming unstable .
When they become unstable the output transformers can open so check both of them for continuity on the primaries before putting too much time and money into it

https://www.hifiengine.com/manual_libra ... 000a.shtml

https://www.hifiengine.com/manual_libra ... 1000.shtml

_________________
Mark
(Conti the brain damaged robot )


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 Post subject: Re: Sansui 1000
PostPosted: Aug Wed 15, 2018 8:42 am 
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Joined: Sep Thu 23, 2010 6:37 am
Posts: 11247
Location: Powell River BC Canada
Sansui was a transformer company to start with. They branched into
HIFI with a small kit amplifier that used their transformers. We once fixed one
of those amplifiers for free so we could photograph it.

_________________
de
VE7ASO VE7ZSO
Amateur Radio Literacy Club. May we help you read better.
Steve Dow
ve7aso@rac.ca


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