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  Re: What to us for a PA dummy 300W load?         


Author: Michael Black
Date: Jul 21, 2008 11:28

On Sun, 20 Jul 2008, dave wrote:
> Looking for ideas here... I'd like test a PA amplifier rated at 300
> watts into 4 ohms.
> Any ideas as what I could use for an dummy load - apart from some
> actual speakers (drivers) that is! I'd also like the load to be as
> resistive as possible and not inductive as the drivers would be.
> As I don't have a 4 ohm 300 watt resistor in the spares box - any
> ideas what could be used as a "subsitute"?
>
I seem to recall reading about using a toaster, or at least the toaster's
heating element, as a load for an audio amplifier.

It likely helps to explain why you need the load. Once upon a time, every
amplifier needed a load, because the design required it. But most solid
state amplifiers can operate without a load, so the need for a load may
no longer be needed, depending on what you are doing.

Michael
no comments
  Re: What to us for a PA dummy 300W load?         


Author: Eeyore
Date: Jul 21, 2008 10:42

dave wrote:
> Looking for ideas here... I'd like test a PA amplifier rated at 300
> watts into 4 ohms.
> Any ideas as what I could use for an dummy load - apart from some
> actual speakers (drivers) that is! I'd also like the load to be as
> resistive as possible and not inductive as the drivers would be.
> As I don't have a 4 ohm 300 watt resistor in the spares box - any
> ideas what could be used as a "subsitute"?

There are loads of options. Farnell sell ultra-large wirewound resistors
for example.

Graham
1 Comment
  Source for new old stock or pulled LM741CN Op Amps         


Author:
Date: Jul 21, 2008 10:26

I am looking for a few LM741CN chips made in the 1970's. Does anyone know of
a source for new old stock or any old equipment that used them that can be
obtained cheap to remove them from?

Thanks!

10 Comments