Re: Filament help!

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Jim Lux <jimlux-at-earthlink-dot-net> 

At 12:40 PM 10/28/2003 -0700, you wrote:
>Original poster: "Jim Mitchell" <Wrenchead-at-starband-dot-net>
>Does anyone know where I can get a 5v 6.5A tranfo online?  Mouser has 5v 8A
>tranfo's but they are like 30$ and thats ridiculous.


$30 is not a ridiculous price for a 40VA transformer, brand new, that 
doesn't happen to be a mass market size and configuration.  I'm sure that 
if you were looking for a battery charger transformer (or a 6.3V filament 
transformer, in days gone by), the cost for a given VA would be lower. 
You'll find some transformers in the 10V range that are fairly cheap 
because they wind up in "wall warts", so they are a mass market 
item.  Don't compare brand new non-surplus catalog prices against what you 
can find surplus.


Low voltage (<10V), high current(>5A) transformers are somewhat unusual in 
modern equipment.  If you have a need for 50+ watts at low voltage, most 
modern equipment uses a switcher (so you don't have to pay for all that 
iron and copper, or shipping of the mass of same, in the finished unit).