lebowski Posted May 18, 2011 Posted May 18, 2011 I have an obsessive compulsive problem djb. Yes it was you that got me interested in Sansui... And I am still looking for a TU-417
SansuiFan Posted May 18, 2011 Posted May 18, 2011 Thanks Lebowski, the MA-7 looks good. How is the AU 11000 treating you? Martin.
lebowski Posted May 18, 2011 Posted May 18, 2011 it's all good Martin. Does sound a bit more 'hi-fi' than the AU-717, digs a bit deeper into the recording, still smooth and 'valve like' but with speed and control at high volume. The AU-717 only needs a small amount of volume to play loud, strangely much less than the more powerful AU-11000. It also sounds a bit leaner so at low volumes I use the loudness switch (yes an audiophile no no) but hey it works for me.
audioguy Posted May 18, 2011 Posted May 18, 2011 Nice score. I want to compare it with my b2301 someday. Congratulation Could not help myself! It's a nice amp. Goes with the 11000. Martin.
The Fez Posted May 18, 2011 Author Posted May 18, 2011 yes, a nice Amp. Not a powerhouse but great sound and worth having in the collection. With respect to the AU4900 - (and vintage, say> 25-30 years amplifiers / receivers in general) is it OK to leave them switched on? I do this with "modern" solid state stuff but not sure about the older gear. BTW the AU4900 is terrific. I also got hold of a Sansui Tuner TU7700 -- thanks to an SNA member! -- which is also fabulous. [ATTACH=CONFIG]32273[/ATTACH]
lebowski Posted May 18, 2011 Posted May 18, 2011 I'm not sure if it's a good idea to leave older gear on. I switch mine off when not in use.
pete_mac Posted May 18, 2011 Posted May 18, 2011 I certainly wouldn't be leaving vintage gear that hasn't been rebuilt/recapped, or at least serviced, switched on all of the time.
LogicprObe Posted May 18, 2011 Posted May 18, 2011 I certainly wouldn't be leaving vintage gear that hasn't been rebuilt/recapped, or at least serviced, switched on all of the time. My Yami gear is! Maybe I'm afraid to turn it off!
Zaphod Beeblebrox Posted May 18, 2011 Posted May 18, 2011 With respect to the AU4900 - (and vintage, say> 25-30 years amplifiers / receivers in general) is it OK to leave them switched on? I do this with "modern" solid state stuff but not sure about the older gear. BTW the AU4900 is terrific. I also got hold of a Sansui Tuner TU7700 -- thanks to an SNA member! -- which is also fabulous.[ATTACH=CONFIG]32273[/ATTACH] ALL equipment should be turned off, when not in use. For several reasons: 1) You waste energy if you leave it switched on. 2) Several components in all electronic products are subject to wear, when warm and/or carrying power. Notably, this affects electrolytic capacitors. Since all electrolytic caps have a finite life-span (between 2,000 ~ 100,000 hours), these components will require more regular replacement when left powered. The average time is around 10,000 hours. Moral: Switch it off, when not in use.
New Sensations Posted May 18, 2011 Posted May 18, 2011 ALL equipment should be turned off, when not in use. For several reasons:1) You waste energy if you leave it switched on. 2) Several components in all electronic products are subject to wear, when warm and/or carrying power. Notably, this affects electrolytic capacitors. Since all electrolytic caps have a finite life-span (between 2,000 ~ 100,000 hours), these components will require more regular replacement when left powered. The average time is around 10,000 hours. Moral: Switch it off, when not in use. But aren't components more likely to fail when being switched on or off (rather than being in a stable 'on' state)?
Ahh- Schnoo Schnoo Posted May 18, 2011 Posted May 18, 2011 I have an obsessive compulsive problem djb. Yes it was you that got me interested in Sansui... And I am still looking for a TU-417 Lebowski, are you aware of this going ATM http://www.ebay.com.au/itm/Sansui-TU-417-tuner-good-condition-/330565285705?pt=AU_Electronics_Vintage_Electronics&hash=item4cf739f749 Might clean up OK? Good luck with your search. For me, i have to be honest with myself and admit that the search is part of the joy of vintage. I'm currently looking for a TU-7900 to match my amp.
Ahh- Schnoo Schnoo Posted May 18, 2011 Posted May 18, 2011 Congratulations Martin (SansuiFan) A great addition to a great collection. Would love to see it one day. Whilst I think I'm starting to lean towards vintage Marantz, the build quality of the Sansui stuff is pretty impressive. Read it described once as 'Japanese McIntosh', must have been an American forum
k-k-k-kenny Posted May 19, 2011 Posted May 19, 2011 Ah, this Japanese gent seems to be keen on vintage, too. Have a wander around the various "rooms". So much for placement ... http://www.gokudo.co.jp/Vanguard/index/index.htm
Zaphod Beeblebrox Posted May 19, 2011 Posted May 19, 2011 (edited) But aren't components more likely to fail when being switched on or off (rather than being in a stable 'on' state)? That is a common and oft-cited myth. The reality is far more prosaic. The myth, as far as I can ascertain, began with the old style, stepper motor hard disk drives used in computers. These old style drives had the potential for 'head crashes' if the power was cut, before the heads were correctly 'parked'. There are, however, a couple of areas that are subject to damage, if a fully electronic (as opposed to an electronic/mechanical) product is repeatedly switched on and off. These are: * The power switch. Mechanical power switches can wear out over time. Normally, these components can sustain many tens of thousands of switching cycles before failure. The cost of a mechanical switch is normally less than $20.00. Electronic siwtches and relays enjoy a much longer life. * The bridge rectifier. This component cops the full surge of a switch on and may fail, if it is insufficiently rated to the task. Manufacturers usually ensure that the surge rating of the rectifier is up to the job. * Fuses. Fuses can often suffer 'fatgue'. These components may wear out with repeated on/off cycling. Fuses cost from 20 cents to a couple of Dollars. That's it. Everything else copes quite well with repeated on/off cycles. OTOH, electrolytic caps WILL wear out, if the product is left powered. That is absolutely guaranteed. Edited May 19, 2011 by Zaphod Beeblebrox Brain fart
lebowski Posted May 19, 2011 Posted May 19, 2011 Lebowski, are you aware of this going ATM http://www.ebay.com.au/itm/Sansui-TU-417-tuner-good-condition-/330565285705?pt=AU_Electronics_Vintage_Electronics&hash=item4cf739f749 Might clean up OK? Good luck with your search. For me, i have to be honest with myself and admit that the search is part of the joy of vintage. I'm currently looking for a TU-7900 to match my amp. I did see that one, however have sourced another. You might have better luck finding a TU-7900 in the US
djb Posted May 19, 2011 Posted May 19, 2011 just sourced another tu 417.............. phew checked mine is still there .... so it werent mine he sourced
Ahh- Schnoo Schnoo Posted May 19, 2011 Posted May 19, 2011 I did see that one, however have sourced another. You might have better luck finding a TU-7900 in the US Yep it's a different market over there. Not sure they know how lucky they have it. I've always been a bit worried having (breakable) electrical stuff sent from overseas. Now would be the time to try with the dollar as it is i guess. Any tips in getting stuff sent?
LogicprObe Posted May 19, 2011 Posted May 19, 2011 That is a common and oft-cited myth. The reality is far more prosaic. The myth, as far as I can ascertain, began with the old style, stepper motor hard disk drives used in computers. These old style drives had the potential for 'head crashes' if the power was cut, before the heads were correctly 'parked'. There are, however, a couple of areas that are subject to damage, if a fully electronic (as opposed to an electronic/mechanical) product is repeatedly switched on and off. These are: * The power switch. Mechanical power switches can wear out over time. Normally, these components can sustain many tens of thousands of switching cycles before failure. The cost of a mechanical switch is normally less than $20.00. Electronic siwtches and relays enjoy a much longer life. * The bridge rectifier. This component cops the full surge of a switch on and may fail, if it is insufficiently rated to the task. Manufacturers usually ensure that the surge rating of the rectifier is up to the job. * Fuses. Fuses can often suffer 'fatgue'. These components may wear out with repeated on/off cycling. Fuses cost from 20 cents to a couple of Dollars. That's it. Everything else copes quite well with repeated on/off cycles. OTOH, electrolytic caps WILL wear out, if the product is left powered. That is absolutely guaranteed. It's the heat that causes electros to fail rather than being left on. This is also why computers mostly fail at switch on. It has nothing to do with parking the heads in HDDs. It's just that the switchmode power supply units are designed with very little headroom and the maximum draw occurs when they are powered up. This is why most PSUs have built in fans. They are cheaper than larger capacitors with a higher temperature rating.
The Fez Posted May 19, 2011 Author Posted May 19, 2011 Thanks everyone for thoughts..Reckon I'll just keep the gear off when not in use...
pete_mac Posted May 19, 2011 Posted May 19, 2011 http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=300558501728&ssPageName=STRK:MEWAX:IT Ooooh... nice clean AU-517, just like mine, but with the optional removable rack handles. Seller has said he'd let it go for $399 buy-it-now including delivery to Australia... so about $AUD375ish. Not bad! It's multi-voltage too, so it suits Australia's power supply. As with any AU-417/517/717 etc a good servicing and inspection/replacement of caps, fuse resistors, diodes, and the removal of the dreaded corrosive glue would be required to guarantee reliable operation.
tassie tiger Posted May 20, 2011 Posted May 20, 2011 (edited) Not sure what constitutes ‘vintage’, but if it’s 20 years + then:- Michell Syncro, you know, the budget one! Gale GS301 stand-mounts Quad 22 and a pair of Quad 2’s (all needing a little tidying up) + a pile of spare ‘new old stock’ EF86’s Beard hybrid integrated amp, with ECL86’s + Mosfet output All was limited expenditure, but keeps me happy. Edited May 20, 2011 by tassie tiger
Guest Posted May 27, 2011 Posted May 27, 2011 Hi, is anyone interested in a TEAC A-H500i integrated amp in pristine condition? See Ebay Australia item #260791314236
LogicprObe Posted May 28, 2011 Posted May 28, 2011 Hi, is anyone interested in a TEAC A-H500i integrated amp in pristine condition? See Ebay Australia item #260791314236 You'd have been better off pasting a link for it. There's a lot of lazy bastards around..................including me!
Chill3 Posted May 29, 2011 Posted May 29, 2011 10,000 hours !!!! So if I leave my amp on it will be no good in 400 days !!!! Can that be right ? ALL equipment should be turned off, when not in use. For several reasons:1) You waste energy if you leave it switched on. 2) Several components in all electronic products are subject to wear, when warm and/or carrying power. Notably, this affects electrolytic capacitors. Since all electrolytic caps have a finite life-span (between 2,000 ~ 100,000 hours), these components will require more regular replacement when left powered. The average time is around 10,000 hours. Moral: Switch it off, when not in use.
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