General discussion area for tube amps.
Moderators: pompeiisneaks , Colossal
Guitarman18
Posts: 454 Joined: Tue Sep 04, 2007 9:32 pmLocation: UK
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by Guitarman18 Sat Mar 15, 2008 11:27 pm
Having recently compiled a list of parts for my latest build I couldn't help but wonder.....
When switching voltages from 117v to 230v (i.e. US to European supply) should one adjust the value of the power fuse used?
Components such as switches are often rated 120v/6A or 240v/3A, which made me think.
If anyone can help with this one I would be grateful.
Cheers, Paul.
ampdoc1
Posts: 669 Joined: Sat Feb 26, 2005 12:42 amLocation: Tulsa, Oklahoma
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by ampdoc1 Sun Mar 16, 2008 12:34 am
Yes. Ohms Law says Power = Volts x Amperes. For the same amp:
Guitarman18
Posts: 454 Joined: Tue Sep 04, 2007 9:32 pmLocation: UK
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by Guitarman18 Sun Mar 16, 2008 10:27 am
Many thanks ampdoc, it's reassuring to think my suspicions were correct.
What I find interesting, is that all the 'export' amps I've owned have selectable voltages but make no reference to changing the fuse value on the back panel.
Perhaps this was mentioned in the manuals, but with 60's & 70's gear, there is a very slim chance of ever seeing them.
Paul.
jjman
Posts: 753 Joined: Sat Oct 06, 2007 2:33 pmLocation: Central NJ USA
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by jjman Sun Mar 16, 2008 8:43 pm
ampdoc1 wrote: Yes. Ohms Law says Power = Volts x Amperes. For the same amp:
Ohm's law is Ohms=Volts/Ampere.
The power equation is named after James
Watt .
If it says "Vintage" on it, -it isn't.
