"Eeyore" wrote in message
...


gareth magennis wrote:

"Ron(UK)" wrote
BobG wrote:

That ancient Peavey transformer might be hotter (thermally! not
wattagely!) on 50hz than on 60hz, and class AB amps dissipate worst
case power at about 1/3rd max power.... its where the load line runs
right across the hyperbola on the IV curve... and if the voltage in
the club sags when the drink cooler compressor turns on, its a perfect
storm of overheat factors.

Voltages in the UK don`t generally sag much if at all


AFAIK the lowest legal voltage the electricity company can supply in the
UK
is 10% down (from 240) which is 216v, the highest legal voltage is 254v,
less that 6% high.

It won't be based on 240V any more because we're officially (on paper)
230V.
Maybe 230 +/- 10% but that's just an EU standard - it's NEVER as low as
that.



On paper maybe, but in practice its still pretty much 240v.




Suffice to say you won't normally get those kind of
variations at the mains intake at the venue.

I don't know how much voltage drop you might experience due to the clubs
wiring before it was deemed unsafe or illegal though.

Never seen any worth talking about. Have you ?

Graham



No, I put that down to good wiring regulations.

(I remember when I was in a function band and we used to play the Forces
bases in Germany with dodgy old 220v domestic-at-best wiring. We only had
about a 3K system but often had to carefully switch the amps on one at a
time to stop the breakers tripping, then all the house lights and all the
gears' illumination would dim in time to the kick drum. Frightening really.
None of my keyboards ever crashed though.)

So what would be the maximum voltage drop you might expect from a non
overloaded mains system?




Gareth.