Colin Lamb 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?"
>
> There could be a few reasons:
> 1. The amp has to be transported and weight is an issue.
Not this one - but it would apply to another one in the planning.
> 2. There are no suitable transformers available and a surplus switching
> supply is handy.
No transformer in stock, but enough bits to build a switcher - so I get
to learn something too.
> 3. Real power transformers cost money and the amp builder is almost penniless
> and a switching supply is given to him.
Not quite penniless, but certainly parsimonious :-)
> 4. The builder, in true amateur spirit, likes to complicate something simple.
>
Guilty as charged.
> 5. Just wants to see if it can be done.
Yep - and it's more interesting than the other 200 jobs I really should
be doing....
73, Steve
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