A transformer running at say 400 Hz would be approximately 1/8 to 1/4 the size
of one at 60 Hz. Not only is it a
weight savings, but the transformer itself will cost much less.
Best,
Will
*********** REPLY SEPARATOR ***********
On 7/14/06 at 5:29 PM Tom W8JI wrote:
>> >I can't imagine why an amateur would want to use a
>> >switching supply for a
>> filament. What reason is there to do that?
>>
>> I can think of only one: lower travel weight for
>> DXpedition use.
>
>The filament transformer is typically about 5-10% of overall
>amplifier weight. On a 60 pound amp that's 3-6 pounds. If
>the switching supply cuts that in half, we save 1-1/2 to 3
>pounds.
>
>I think the real advantage is being cheap.
>
>73 Tom
>
>
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