[time-nuts] transformers.

[J. Forster]

You can reduce (or increase) the line voltage with a small filament
transformer connected to buck (or boost) the line. For things up to a
couple of hundred Watts, the cost is <$10.

-John

================


> Ah but transformer design will become a lost art and will spawn lots of
> little garage industies :-))
> I have certainly had some Heath transformers overheat and go shorted-turn
> primary when used on 50Hz in the UK, and also some Japanese
> ones.......they
> have 50Hz and 60Hz I believe unless they have rationalised in the last 30
> years. What makes it worse is our nominal is 240V AC not 220
> Alan G3NYK
>
> ----- Original Message -----
> From: "Charles P. Steinmetz" <charles_steinmetz at lavabit.com>
> To: "Discussion of precise time and frequency measurement"
> <time-nuts at febo.com>
> Sent: Monday, June 27, 2011 7:36 PM
> Subject: Re: [time-nuts] No more 60Hz! TEC Elimination
>
>
>>
>> >The only thing I know of, apart from clocks, that you should not run
>> >on the wrong frequency are oldfashioned mechanical shavers.
>>
>> There are lots of consumer products sold in North America that
>> specify 60 Hz only, and in which the transformers will hum and
>> overheat if run on 50 Hz.  I have always designed with transformers
>> that will accept 47-63 Hz, but many competitors do not.  As more and
>> more items move to switching power supplies, this will be less of an
>> issue (of course, in many applications the switching supplies
>> themselves will create new issues...).
>>
>> Best regards,
>>
>> Charles
>>
>>
>>
>>
>>
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