[time-nuts] Thunderbolt - any negatives ?

[Steve Rooke]

The other issue is noise from a switcher.

2009/6/2 Hal Murray <hmurray at megapathdsl.net>:
>
> phill.r1 at btinternet.com said:
>> I would recommend using a linear PSU, I have some made by a Company
>> called  Lascar (perhaps a different name in the States). These are not
>> much larger  than the Thunderbolt itself with a little more height.
>> They have three  separate VS./Rags, 5 volts and +15/-15 volt supplies
>> of sufficient  capacity - all with trim-pots. Mine has been working
>> for at least one year  non-stop - and you can be confident that it
>> will not blown up, unlike some  switched supplies.
>
> Is there something I don't understand in this area?  What makes a linear
> supply more reliable than a switcher?
>
> My first guess would be a switcher would be more reliable because it would
> run cooler.
>
> That's probably assuming the same amount of design effort which is probably
> not a valid assumption if I'm comparing a brand-X linear with a brand-Z
> switcher.  A quick glance at the general construction might give a better
> answer.
>
>
>
> --
> These are my opinions, not necessarily my employer's.  I hate spam.
>
>
>
>
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-- 
Steve Rooke - ZL3TUV & G8KVD & JAKDTTNW
A man with one clock knows what time it is;
A man with two clocks is never quite sure.