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Post by Deleted on Apr 21, 2015 15:14:51 GMT
dogma is the enemy of knowledge . That I'm afraid DQ is total poppycock and pure unadulterated drivel from the top shelf of paralegal's pillow talk. Dogma is one of the rather enjoyable cult films starring Hans 'Gruber' Rickman, Selma Hayek, Ben Affleck, Matt Damon and a few others. A rather spiffing cinematic gem absolutely nothing to do with capacitors whats so ever |
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Post by Pinch on Apr 21, 2015 15:31:29 GMT
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Post by dvh on Apr 21, 2015 15:35:52 GMT
But just to add to the debate , what about transistor thermal shock does the constant reheating cooling from on/off mechanisms not outweigh the permanently charged effects in your opinion or capacitor charge induced stress. once again issues arsing out of constant on/off . there are surely consequences and effects of both decisons and a one is right one is wrong is surely inaccurate . dogma is the enemy of knowledge . I would go by what the manufacturer recommends for any given piece of equipment, especially if not doing so voids the warranty. |
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Post by pre65 on Apr 21, 2015 15:36:33 GMT
I feel that it is possibly (even probably) kinder on electrical components to leave them switched on 24/7.
But, I would not do that to any hi-fi in my house. No amount of pettifoggery will convince me otherwise. 
It's up to the individual to decide what is best for them.
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Post by Sovereign on Apr 21, 2015 16:05:01 GMT
It's a statement of the facts. I won't be debating it or providing any evidence. If being a professional Electronic Engineer specialising in Hi Fi equipment and with a life time of experience ain't enough then tough  Thats one of the most sensible statements I have read on any hifi forum |
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Post by Deleted on Apr 21, 2015 16:40:45 GMT
Jez
Could have added verbatim would work just as well.
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Post by guy on Apr 21, 2015 19:28:21 GMT
I feel that it is possibly (even probably) kinder on electrical components to leave them switched on 24/7.
But, I would not do that to any hi-fi in my house. No amount of pettifoggery will convince me otherwise.
It's up to the individual to decide what is best for them. Definitely up to the individual to decide. Confusing opening statements though - are you really saying that despite it being kinder to leave components on 24/7 you have decided not to do that? Are you in need of advice from a kibitzer? |
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Post by ChrisB on Apr 21, 2015 20:06:53 GMT
Take a look at Philip's equipment and you may understand why he would make such a comment. |
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Post by guy on Apr 21, 2015 20:31:15 GMT
I did have a look and do understand.
Only his amps are valve - the rest is solid state.
If it is kinder to leave electrical components turned on "24/7" why not do that for the other (solid state) parts?
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Post by MartinT on Apr 21, 2015 20:48:24 GMT
My system sounds better fully warmed up. By leaving it switched on, it's ready to play when I am.
I'm not going to debate it either as I'm not going to change what I know to be the case with said system.
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Post by pre65 on Apr 21, 2015 20:58:05 GMT
I have valve amps, a valve preamp and a valve phono stage.
I have never been one for leaving anything switched on unless absolutely necessary.
When I go out I switch most things off at the socket, always have done.
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Post by pre65 on Apr 21, 2015 21:00:32 GMT
If it is kinder to leave electrical components turned on "24/7" why not do that for the other (solid state) parts?  |
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Post by gazjam on May 1, 2015 10:40:48 GMT
dogma is the enemy of knowledge . That I'm afraid DQ is total poppycock and pure unadulterated drivel from the top shelf of paralegal's pillow talk. Dogma is one of the rather enjoyable cult films starring Hans 'Gruber' Rickman, Selma Hayek, Ben Affleck, Matt Damon and a few others. A rather spiffing cinematic gem absolutely nothing to do with capacitors whats so ever Dont forget the Golgothan the shit Demon... Back on topic: Valves - No way Solid State - Depends. Electricity cost, personal preference, hair-shirt'ness... I always go with the designer or manufacturer's reccy, assuming they know their onions. In my case, at night I used to always switch off my Balanced Mains Unit powering all my kit, but Densen advise to leave their preamp on all the time apart from when your "on a long holiday" (direct quote) It uses 10 watts when on, so no leccy trauma and its brand new caps, transformers and resistors need a bit of time on them to bed in. |
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Post by TheBigLebowski on May 3, 2015 21:29:45 GMT
As an ex radio and systems tech in the Army (Royal Signals) we were taught that it was the power on/off that degrades or reduces transistor life more than normal running. Army radios were designed with better components (mil spec) so they would run 24/7 for months or years at a time. We had radios coming through the workshops that still had the original Plessey fitted transistors and caps from 20-30 years earlier. The clansman amps varied from 20 - 250 Watts Class A or C so weren't lightweight things.
I leave my amps switched on 24/7 and just mute the pre when not using them or switch them off if I'm away for more than a few days.
Yes its a personal choice but fire risk and leccy bills have more substance than component life in this argument.
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Post by Steve Toy on Sept 2, 2015 9:10:02 GMT
CD player and DAC are left on. Valve amps are turned off.
Back in the day, when I had solid state amps they were left on 24/7.
Sacrifices to sound quality in order to feel warm inside about your very token contribution to 'the environment' are not my thing at all.
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Post by Deleted on Sept 2, 2015 10:08:58 GMT
Now the life of a cap is between 2000hrs and 5000hrs for most Power Semiconductor it depends on SOA but it is about 100Khrs, chips again depends on type cmos 25Khrs that if they are run within the spec, most commercial stuff pushes it to the limits. Opto and leds lose their brightness to half after 20Khrs at normal rating. So the design and the construction is the key, build it BOMB proof and the more parts you add the sooner it will break KISS rules are best always. Turning ON does stretch the inrush current on rectifiers and caps and this is often what dies first followed by op devices. I have tried to seal the power device with epoxy resin to keep the smoke in but it never works so this was not the answer. |
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Post by Guest on Sept 2, 2015 10:44:01 GMT
Now the life of a cap is between 2000hrs and 5000hrs for most Power Semiconductor it depends on SOA but it is about 100Khrs, chips again depends on type cmos 25Khrs that if they are run within the spec, most commercial stuff pushes it to the limits. Opto and leds lose their brightness to half after 20Khrs at normal rating. So the design and the construction is the key, build it BOMB proof and the more parts you add the sooner it will break KISS rules are best always. Turning ON does stretch the inrush current on rectifiers and caps and this is often what dies first followed by op devices. I have tried to seal the power device with epoxy resin to keep the smoke in but it never works so this was not the answer. Very informative answer, thank you. |
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Post by Deleted on Sept 2, 2015 11:35:51 GMT
I'm happy that so many ignore my advice to switch off when not in use... it gives extra repair work!
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Post by Guest on Sept 3, 2015 18:34:03 GMT
Electric will not be any higher, is my understanding, 'charge up', or 'booster' or what ever you want to call it uses a great deal more electricity than idling, or have I got that wrong? |
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Post by ChrisB on Sept 7, 2015 7:22:02 GMT
I have always been advised to leave my amp on at all times [costs 3pence per month in electricity] I have also been told that the easiest way to break anything electrical is by turning it on and off too often. Then in another forum, I was told this is poppycock and that leaving the amp on all the time wears out the capacitors. So; who is right, come on Standarzi, [ the plural for several members of the Standard] settle the matter for me? Ha! So has the thread sorted out this knotty problem for you then? |
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