Larry-- I use a +12 volt linear supply (an open-frame leftover) with a 7805 for the +5 rail. For -12, I use a 2 watt isolated dc-dc converter (leftover from another project).
As others have stated, the +12 rail seems to be the noise sensitive one. 73 bob k6rtm in silicon valley ------------------------------ Message: 4 Date: Thu, 10 Feb 2011 15:16:55 -0800 From: Larry McDavid <lmcda...@lmceng.com> Subject: [time-nuts] Thunderbolt Supply To: Timenuts <time-nuts@febo.com> Message-ID: <4d5471e7.4050...@lmceng.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed 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) _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
