[time-nuts] Thunderbolt PSU
David Ackrill
dave.g0dja at tiscali.co.uk
Tue Jul 22 09:49:45 UTC 2008
The Thunderbolt arrived today. Thanks again to all involved.
However, it looks like my PSU is faulty.
I carefully cut the outer on the cable, splayed out the coloured inner
connectors, so as to avoid short circuits, and noticed that colours of
the insulation on the cable cores did not match the colour code given at
http://www.leapsecond.com/pages/tbolt/power.htm
No problem, I have a multi-meter and was trained as an electrical
engineer so I should be able to sort out what was going on.
On plugging in a lead there was a slight 'buzz' and, on checking the
outputs, no DC volts. Checking the lead showed no AC volts. So, I
opened the plug and checked the fuse, a 3 Amp type - too big for the
unit output really, but shouldn't have blown...
Changing the fuse for a 1 amp type, and plugging back in showed no
output voltage again. Checked the business end of the lead and there's
AC volts still there. I'm guessing, from experience of these PSUs in
the past, that there's a fuse inside the unit which has also blown. If
so, I guess I have a faulty PSU?
Ah well, a trip to the local PC Store for a +12v/-12v, +5 Volt PSU I guess.
Also, I see that the antenna socket on the Thunderbolt is an F-type.
Someone has thoughtfully provided an F-Type to BNC adapter. However,
the plug on the Motorola GPS antenna is an SMA type. Ah well, I can
make a lead which should work instead. :-)
Dave
More information about the Time-nuts_lists.febo.com
mailing list