Max power consumption of 50watt head - what is it?

sean_b · Post by **sean_b** » Tue Jun 26, 2007 5:05 pm

I have a UK issue 1969 50watt head, that in its lifetime has had the power transformer replaced.

When the work was done the voltage selector was not wired into the circuit, so right now it's locked at 240VAC only.

I now live in Canada which has a 110 mains voltage, so i'm using a step up converter. I own several of these, and they come in two capacities - one is rated for 100W the other for 300W.

I've been using the 300W unit with my amp for safety since it's pretty sure to give me plenty of headroom, but it's annoyingly large and heavy so I'd like to swap out to using the 100W unit.

What I don't know is, what is the peak power consumption of a 50watt head at full tilt? Will I have enough headroom with the 100W converter?

Anybody have a definitive measurement they could share?

Thanks

Sean

SDM · Post by **SDM** » Tue Jun 26, 2007 5:44 pm

Maximum power consumption = 175watts for a 50 watter according to Marshall's JCM 800 service manual (includes 2204, 1987, and 1986 models).

sean_b · Post by **sean_b** » Tue Jun 26, 2007 6:42 pm

SDM wrote:Maximum power consumption = 175watts for a 50 watter according to Marshall's JCM 800 service manual (includes 2204, 1987, and 1986 models).

Damn, damn, damn, damn, damn, damn, damn!

LOL

Thanks Steve.

Looks like I'm stuck lugging the 300W converter around for another while.

At least until I buy the correct transformer from MetroAmp and re-wire in the voltage selector for my amp.

Sean