[TenTec] Power supply types

[Peter Frenning [OZ1PIF]]

Den 21-01-2014 08:54, Rick - DJ0IP / NJ0IP skrev:
> What is the probability of us actually getting ANYTHING these days that is
> properly-designed, and engineered ?
> Competition in the form of cost and time to market pressure are driving the
> trend in the other direction.
>
> NOW THEN, assuming both are good but not perfect, what is the probability of
> type generating some amount of noise?
>
> I won't answer that, I'll just point people to the ARRL power supplies tests
> over the past 5 or 6 years.  They show the noise for each switching power
> supply tested.  I can't recall ever seeing them showing noise on a linear
> supply, just ripple.
>
> I'm glad we have both types.  I prefer a linear supply at home and a
> switcher for portable.
>
> My linear supply was home brew by me in 1980 and usually ran 24x7 until 2007
> when I moved to the states and left it here. Since I'm back it's running
> 24x7 again. (It was only 230v).
>
> What is the probability of most of today's switchers still running you years
> from now?
>
> 73 - Rick, DJ0IP
>
Well, my 45A switcher (MFJ-4245MV), bought in the States in 1998, has 
been running 18/7 ever since - no noise, that I can detect, on any of 
the HAM-bands, no problems (except for instrument lights burning out) 
and the occasional cleaning for accumulated dust

-- 
Vy 73 de OZ1PIF/5Q2M, Peter

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