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Posted

[quote name='51m0n' post='536327' date='Jul 9 2009, 11:59 AM']Thats a very expensive way to toast bread though.....[/quote]
Could be handy if you get the munchies halfway through a gig. Give the vocalist something to do during the instrumental number!

Posted

[quote name='henry norton' post='536245' date='Jul 9 2009, 10:23 AM']Here's a link to a guy in Nottingham making 1000 watt valve amps. [url="http://www.chambonino.com/construct/const9.html"]1000w valve amp[/url]

He's using just 4 813 transmitter valves as opposed to the 20 or so 6L6s you'd need if you were to use 'ordinary' valves. I'm surprised we haven't seen more manufacturers going down this road. The only downside seems to be the rather frightening 2500 volts on the anodes but having said that, 400 volts will kill you just as dead....[/quote]
i've seen this beast the pictures don't do it justice, you should see the new one hes just made with 20 807s its even more of a beast!

Posted

Could someone maybe send him a link to this thread? It would be really great for him to do a build diary here as well. He's brilliant :)

BTW, there are [url="http://news.bbc.co.uk/2/hi/technology/7909014.stm"]some blokes out there[/url] who have built their own water cooled desktop PC's, so if the heat of the valves ever became an issue then it might be possible to build a cooling system along these lines. :rolleyes:



[url="http://www.vonslatt.com/proj-cc4.shtml"]http://www.vonslatt.com/proj-cc4.shtml[/url]
[url="http://computer.howstuffworks.com/liquid-cooled-pc.htm"]http://computer.howstuffworks.com/liquid-cooled-pc.htm[/url]
[url="http://www.watercoolinguk.co.uk/catalog/"]http://www.watercoolinguk.co.uk/catalog/[/url]

Posted

I suppose water and +/- 5 volts isn't quite as deadly as water and 2,500 volts. :)

Actually, quite allot of transmitter valves were liquid cooled - the valves this guy is using are quite small in comparison. There are probably no real limits to how powerful a valve amp can be other than how much weight you can lift.

Posted

I also recall seeing a [url="http://www.tomshardware.com/reviews/strip-fans,1203.html"]computer immersed in vegetable oil[/url] for cooling reasons- handy if your deep fat fryer breaks and you fancy some chips. Although I suppose that would make the whole assembly virtually unliftable.

Posted

bigger transmitter tubes than these 813s have been cooled with hot water vapour. So imagine the next stage of a tube bassamp: 10000 Watts with it´s own heater for the steam.....

Anyway I´d like to hear his amp distort

Posted

[quote name='GreeneKing' post='539332' date='Jul 13 2009, 01:48 PM']Your car spark plugs operate at about 20,000 volts and they won't (normally) kill you :)[/quote]
The aren't 1000w though. Fairly important difference.

Posted

Volts and Watts aren't the killer, it's Amps that kills you. I've had plenty of lovely 240V wall shocks but at 2A it's not too bad.

However high enough volts can stop dodgy hearts, so don't try and burn a soldeing iron through the back of any plugs (as I once saw at high school in electronics class).

Posted

I'd Love to hear it through a couple of big cabs, but what would realistically suit/handle this kind of amp?

Im thinking a pair of Barefaced Vintage cabs - woof woof!

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