[time-nuts] Thunderbolt Supply

[J. L. Trantham]

Larry,

I favor a linear regulated supply rather than a switching supply.  I had a
TBolt die while connected to a switching supply in an environment where
there were frequent power outages.

The +12 VDC current drops significantly after the OCXO warms up, probably
down to about 200 mA or so.

Good luck.  They are neat little devices.

Joe

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
Behalf Of Larry McDavid
Sent: Thursday, February 10, 2011 5:17 PM
To: Timenuts
Subject: [time-nuts] Thunderbolt Supply

Greetings! I am a new member of the mail list. I've been using a HP
Z3801A GPS-steered standard but have just acquired a Trimble Thunderbolt
GPS Disciplined Clock.

I'm seeking a recommendation for a power supply for this Thunderbolt
receiver. There is much discussion about noise from some switching
supplies and the effect on phase noise of the 10 MHz output. The
Thunderbolt manual specifies the following supply and loads:

+12 vdc  750 mA
+ 5 vdc  400 mA
-12 vdc   10 mA

This combination is somewhat unusual in that the highest current is on
the 12 volt output rather than the 5 volt output. I'm asking if list
members have a favorite power supply for this unit, why and where I can
obtain one.

--
Best wishes,

Larry McDavid W6FUB
Anaheim, CA  (20 miles southeast of Los Angeles, near Disneyland)

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