[time-nuts] Re: Syncserver S300 power supplies

[Todd Smith]

Thanks Andrew,

It looks like that case is standard among the earlier Symmetricom
Syncservers but that the power supply varied to the motherboard and options
like Rb or OCXO oscillator.  There doesn't seem to be multiple mounting
options and +/-15V is a little bit unusual.

It is a PowDec HDT125-43-C-RA
Input: 100-240VAC, 50-60Hz, 2A
Output: +5V, 10A
             +15V, 4A
             -15V, 1A
125 watts max

Todd
Thanks


On Sun, Jan 15, 2023 at 3:26 PM Andrew Kalman <aekalman at gmail.com> wrote:

> I posted some pix of the insides of an Orolia (/Spectrocom) GSG-series
> GNSS simulator last week -- it uses an off-the-shelf power supply, with L+N
> on a connector, GND on a ring-terminal wire, and then the various regulated
> outputs on another connector.
>
> The internal power supply is mounted on ~10mm standoffs above the PCB. I
> noticed last night that there are several (maybe a total of three?)
> different hole patterns in the PCB beneath the power supply (that is using
> one of them). So, it looks like they had the foresight to design for a
> couple of different  power supplies, and just had to do some trivial
> cabling between the instrument and the power supply to make it all work.
>
> --Andrew
>
>
>
> On Sat, Jan 14, 2023 at 4:35 PM Todd Smith via time-nuts <
> time-nuts at lists.febo.com> wrote:
>
>> Thanks Glen,
>>
>> I had tried to send it off to a repair house, but they weren't able to
>> repair it so I am looking for options.  The label is pretty clear and I
>> have looked at other power supplies with the same specs but they have
>> different pinouts and it is extra trouble to repin the motherboard power
>> connector to the new PS.  The other issue is trying to match up passive
>> cooling with the 125 watt output rating.
>>
>> Obviously, Symmetricom chose a PS that met their needs, just wish it was a
>> bit more common.  The S200 and S250 use a different PS with different
>> voltages and lower wattage rating.
>>
>> Thanks for your help.
>> Todd Smith
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>