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Crack;Bottlehead OTL - Page 120

post #1786 of 6347
Quote:
Originally Posted by Ultrainferno View Post

I just discovered I left my crack turned on for the last 4 days without being home. Problematic?

 

Whoa dude! At a power draw of ~35W, and 96 hr, and 15c/kW/hr, that would have cost you 50 cents!!!!!!!!!111

 

No, its perfectly fine.

post #1787 of 6347
Quote:
Originally Posted by Ultrainferno View Post

I just discovered I left my crack turned on for the last 4 days without being home. Problematic?

That should be no problem in the past tube equipment was on 24/7

When I build a new amp I leave it on 24/7 for a week before I ship it.

post #1788 of 6347
Quote:
Originally Posted by 2359glenn View Post

That should be no problem in the past tube equipment was on 24/7

When I build a new amp I leave it on 24/7 for a week before I ship it.

 

Quote:
Originally Posted by Beefy View Post

 

No, its perfectly fine.

 

beerchug.gif

post #1789 of 6347
Quote:
Originally Posted by Ultrainferno View Post

I just discovered I left my crack turned on for the last 4 days without being home. Problematic?

 


Doubt it, tubes are made to run 24/7. My DAC has been on 24/7 the last 8 years. As long as the transformer can take it and there are no cold solder joints.

 

KP

post #1790 of 6347
Quote:
Originally Posted by TheKillerPiglet View Post

Doubt it, tubes are made to run 24/7. My DAC has been on 24/7 the last 8 years. As long as the transformer can take it and there are no cold solder joints.

 

KP

 

Well see, I joked about the power usage for the Crack above...... but leaving something on like that is just insanely and unnecessarily wasteful.
 

It is something like 70,000 hours, which is *definitely* a drain on tube function, but also passive components like capacitors. Not to mention a minimum of $100 in electricity charges assuming just a 10W draw..

post #1791 of 6347
Quote:
Originally Posted by Beefy View Post

 

Well see, I joked about the power usage for the Crack above...... but leaving something on like that is just insanely and unnecessarily wasteful.
 

It is something like 70,000 hours, which is *definitely* a drain on tube function, but also passive components like capacitors. Not to mention a minimum of $100 in electricity charges assuming just a 10W draw..

This the recommended use of the DAC, power cycling puts greater strain on the tubes that leaving it on. The only casualty so far has been a rectifier tube going after 7 years, although the other tubes do get rolled. I would not do this with a power amp, though. Having said that, I've left the big tube monoblocks on for 3-4 days running over long weekends.

 

KP

post #1792 of 6347
Quote:
Originally Posted by TheKillerPiglet View Post

This the recommended use of the DAC, power cycling puts greater strain on the tubes that leaving it on.

 

Complete and utter audiophool rubbish.

post #1793 of 6347
Quote:
Originally Posted by Beefy View Post

 

Complete and utter audiophool rubbish.


Thank you for playing, do pickup a parting gift.

 

KP

post #1794 of 6347

The folks at Bottlehead recommend that you shut down the Crack if it isn't going to be used within 2 hours.  I'd take their recommendation over most others.
 

post #1795 of 6347
Quote:
Originally Posted by TheKillerPiglet View Post

Thank you for playing, do pickup a parting gift.

 

 

Please, tell us all exactly what "strains" in a tube during power cycling. I'm sure we'd all love to hear your explanation of what imaginary effect is worse than other very-real-and-well-characterised degradation effects.

post #1796 of 6347
Quote:
Originally Posted by Beefy View Post

 

Complete and utter audiophool rubbish.

 

+1 on that.

post #1797 of 6347

I don't recall having said shut it down if it isn't going to be used in 2 hours. Maybe one of the other guys here did. My take on this is that tubes are kind of like incandescent light bulbs (does anybody use those anymore?), but not exactly. There is a limit to the lifetime but it is typically much longer lifetime than an incandescent light filament. The cathode (filaments or cathode heated by a heater) gradually loses its ability to emit electrons with use. Like a light bulb, power cycling the tube heater or filament probably does create some potential stress from the thermal change. But generally a filament or heater break is not the way a tube dies. More often the cathode runs out of emissive material. So it's probably better to leave tubes off if you don't plan to use them for a while.  

 

The other side of the coin here is that a tube needs to heat up for a while to sound its best. So my suggestion is to turn the amp on for a while, like 20 minutes to an hour before you do any critical listening. And shut the amp off when you know you are finished with it for the day.

post #1798 of 6347

I posted this on the buy/sell forum,just in case,someone here might be interested:

 

   http://www.head-fi.org/t/664605/bottlehead-crack-amp-w-speedball-upgrade

 

Please PM me if interested

 

Thanks

Mike

post #1799 of 6347
Getting a mainline? tongue.gif
post #1800 of 6347
it's the wait time for a bottle head crack still about 4 weeks? what about with the speed ball? thx.
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