[time-nuts] Anybody want a Thunderbolt power supply?
Bob kb8tq
kb8tq at n1k.org
Wed Aug 31 20:49:33 EDT 2016
Hi
It is not that hard to do. Use a linear rather than a switching approach. Run the +12 and +5 supplies off of LT1764 regulators. The -12 is very low current, run it off of a low noise op amp. There are lots of toroidal line transformers that will drive something like this.
Bob
> On Aug 31, 2016, at 6:20 PM, Cube Central <cubecentral at gmail.com> wrote:
>
> Wow, given all the responses about the cleanliness of the power into a Thunderbolt, I would be even more interested in a power supply that did *not* leave the "last mile" up to me. I would be more interested in a "pretty clean" power supply that I could just plug in and go. Any thoughts of me actually wiring the last bit of it make me break out in a cold sweat and come face to face with my (established, and sadly slow-to-expand) limitations.
>
> Maybe I'm the only one that would be interested in such a solution? I hope not, but I can see that there is a lot to consider about such a thing.
>
> Cheers!
>
> -Randal
> (at CubeCentral)
>
> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Bob Stewart
> Sent: Wednesday, 31 August, 2016 15:29
> To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
> Subject: Re: [time-nuts] Anybody want a Thunderbolt power supply?
>
> OTOH, how many time-nuts have any interest in paying for a power supply that's up to time-nuts standards? It's really not easy to bring a small product to market at a small price. Even if you completely discount the personal effort of design, construction, and marketing, there's the issue of packaging. Without a package, it's just an amateur effort not worth considering. With a package, such as a Hammond box, the price moves into new territory and nobody's interested.
>
> Bob
>
>
> From: Charles Steinmetz <csteinmetz at yandex.com>
> To: time-nuts at febo.com
> Sent: Wednesday, August 31, 2016 4:24 PM
> Subject: Re: [time-nuts] Anybody want a Thunderbolt power supply?
>
> Mark wrote:
>
>> Some times a full linear supply is not a viable option due to power dissipation/size issues or the utter convenience of using a switching wall wart.
>
> In the context of the present discussion -- powering a Tbolt for time-nuts use -- the first consideration would just be laughable and the second would be nothing but terminal laziness.
>
> Best regards,
>
> Charles
>
>
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