[time-nuts] Thunderbolt - any negatives ?

Pete Lancashire pete at petelancashire.com
Mon Jun 1 13:07:29 EDT 2009


Anyone running with a power supply with built in UPS ?

A long time ago (>15yrs) I did project that for a supply did
a/c line -> battery -> +5/+12/-12. A side advantage was great
isolation.

Can't remember the supply vendor tho' ...

-pete


> Joe and others
> 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.
> Roy
>
>
> ----- Original Message -----
> From: "J. L. Trantham" <jltran at worldnet.att.net>
> To: "'Discussion of precise time and frequency measurement'"
> <time-nuts at febo.com>
> Sent: Monday, June 01, 2009 3:40 PM
> Subject: Re: [time-nuts] Thunderbolt - any negatives ?
>
>
>> Pete,
>>
>> I have purchased units via the 'group buy' and directly from Bob Mokia
>> (fluke.l).  One of the 'group buy' units, powered by the accompanying
>> 'group
>> buy' power supply, died after being left on for a couple of days (as I
>> recall).  I still have it disassembled in a box in line on my 'to do
>> list'
>> of things to fix.
>>
>> I was suspicious that the power supply might have been the culprit,
>> perhaps
>> facilitated by frequent power outages (i.e. transients), even though the
>> power supply still works.  Since then, I have only powered the units
>> with
>> linear power supplies with no problems.
>>
>> Joe
>>
>> -----Original Message-----
>> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>> Behalf Of Pete Lancashire
>> Sent: Sunday, May 31, 2009 10:33 PM
>> To: time-nuts at febo.com
>> Subject: [time-nuts] Thunderbolt - any negatives ?
>>
>> Thanks to those that have replied. It looks like just about everyone
>> recommended the Thunderbolt. But before I invest .. any negative
>> comments ? Specs, reliability, or ?
>>
>> -pete
>>
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>
>
>
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