"Tough Guy no. 1265" wrote in message
news
On Mon, 09 Nov 2015 22:09:29 -0000, Rod Speed
wrote:



"Tough Guy no. 1265" wrote in message
news
On Mon, 09 Nov 2015 19:07:23 -0000, Rod Speed
wrote:



"Tough Guy no. 1265" wrote in message
news On Mon, 09 Nov 2015 17:52:06 -0000, Rod Speed

wrote:



"Tough Guy no. 1265" wrote in message
news On Mon, 09 Nov 2015 16:46:00 -0000, charles

wrote:

In article , Tough Guy no. 1265

wrote:
On Mon, 09 Nov 2015 15:26:07 -0000, charles

wrote:

In article , Tough Guy no. 1265
wrote:
On Mon, 09 Nov 2015 13:48:44 -0000, Dave Plowman (News)
wrote:

In article , Tough Guy no. 1265
wrote:
Anyway, every time I've seen one of those yellow builders
transformers for sale, it's referred to as isolating.

Of course it's isolating. That refers to the design of
transformer.

Hmmmm, isolating from the mains perhaps. I assumed isolating
was
completely isolated, as in floating.

Using an auto transformer

Oh is that what they're called, I call those Variacs. Very
useful.

Vsriacs have a variable ouput. Autotransfomers can be fixed.

Seems pointless. Are they cheaper than two separate coils or
something?

yes because it's only one coil - with a tap somewhere near the
middle
(to
get 120V)

I guess they're more for smaller step downs? Because most are like
240V
to 12V, where the output needs more current so a thicker coil.

Anyone with even half a clue doesn't use transformers for those
anymore.

I do if one is lying around.

More fool you.

I've yet to see a low voltage AC supply that doesn't use a transformer.

**** all uses low voltage AC.

I've found it useful on a number of occasions.

Not with an external transformer it hardly ever does.