"GregS" wrote in message
...
In article , AZ
Nomad wrote:
On Thu, 24 Jun 2010 00:30:47 +1000, Grant wrote:
On Wed, 23 Jun 2010 13:23:04 +0000 (UTC), Meat Plow
wrote:

On Wed, 23 Jun 2010 08:48:22 +0100, N_Cook ??o??:

Just curious about these - how were they used? All that is known is
they
came from an audio lab.
About 200 watt, 2.8 ohm vitreous resistors. 200watt estimated, by me,
from surface area scaling of 2.5 and 6W ones, these are 210 mm long
35mm
diameter. Some sort of multiple series and parallel for 2 ohm etc or
with L and C for speaker simulation ?

Most newer SS amps are rated to a minimum of 2 ohms.

CAR AMPS

And cheapie meter leads might account for the extra 0.8 Ohms?

You'd need at least 90' of them (at 20 AWG)

or 8' of 30AWG, but I've never heard of such slim wire
being used for probes.

I typically get .3 ohms on the Fluke.

I have a couple dummy loads. One with 8- 50 watt gold
chassis resistors attached to sink with fan.
I have four more separate sinks without fan.
I either choose 8 ohms or 4.

greg



My highest power dummy load is a (hacked) 3KW fan heater.



Gareth.