[time-nuts] SMD TADD-1 distribution amplifier

Bob Camp kb8tq at n1k.org
Sat Dec 19 08:48:32 EST 2015


Hi

The medical wall warts (at least the US ones) are a nice option. If you get
them from the importer, the cost adder is in the 20 to 30% range. The great
thing they do is to break the ground connection between the AC supply line and the output
negative. It’s not a prefect solution, but it’s a start.

Bob

> On Dec 19, 2015, at 3:12 AM, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> 
> --------
> In message <20151219095948.xmKOo2n3 at smtp17.mail.yandex.net>, Charles Steinmetz writes:
> 
>> There is a reason why some power transformers cost $385 and others 
>> with similar basic specs (voltage, current) cost $22.
> 
> For sensitive stuff I usually pick power supplies (of all kind)
> which are certified for medical use, they usually have wastly
> superior specs on all these "secondary" paramters, but only
> twice the cost.
> 
> -- 
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe    
> Never attribute to malice what can adequately be explained by incompetence.
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