On 26/07/2015 10:55 PM, Cursitor Doom wrote:
Hi all,

I have an Audiolab 8000 amplifier I picked up at a boot sale and would
like to establish what it's capable of, since subjectively the power
output seems a bit on the low side when driving recommended speaker loads.
Anyway, ideally I'd like to use an 8 ohm 100W power resistor as a dummy
load for each channel and then measure the p-p voltage output across it
on a scope with the amp turned right up. Trouble is, I don't have such a
resistor and was wondering if there's any suitable substitute? I recall
someone somewhere using a car headlamp bulb but I doubt they come as 8
ohm units so some sort of elaborate series/parallel combo of lamps would
be necessary to get that value. Has anyone a better idea?
cheers, CD.


**Lamps are a really bad idea. Don't do it. Incandescent lamps exhibit a
HIGHLY variable resistance, depending on how much current is flowing.

Just buy four of these of these:

http://www.newark.com/vishay-dale/rh...w-1/dp/41K9167

Dump them in a bucket of water, or bolt them to a chunk of aluminium and
place a small fan on the aluminium.

--
Trevor Wilson
www.rageaudio.com.au

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