[time-nuts] Low noise power supplies for time nuts circuitry

shalimr9 at gmail.com shalimr9 at gmail.com
Thu Nov 24 09:49:28 EST 2011

From a noise and long term stability standpoint, it would not be better than the last device in the chain, and the 78xx series is not great.
But you would gain additional ripple and line variation rejection, so if that's what you need to do, it may help.

Didier KO4BB

Sent from my BlackBerry Wireless thingy while I do other things...

-----Original Message-----
From: Chuck Forsberg WA7KGX N2469R <caf at omen.com>
Sender: time-nuts-bounces at febo.com
Date: Wed, 23 Nov 2011 04:50:49 
To: Discussion of precise time and frequency measurement<time-nuts at febo.com>
Reply-To: Discussion of precise time and frequency measurement
	<time-nuts at febo.com>
Subject: Re: [time-nuts] Low noise power supplies for time nuts circuitry

How well would a pair of cascaded 3 terminal regulators do - say a 7815 
feeding a 7812.
How sensitive are each of a Thunderbolt's 3 supplies to noise?

On 11/23/2011 04:13 AM, Attila Kinali wrote:
> On Tue, 22 Nov 2011 12:38:43 -0500
> Bob Camp<lists at rtty.us>  wrote:
>> There are a couple of circuits (low noise op-amp based)
>> that can generate lower noise than what he's shown.
> What circuits would that be?
> 			Attila Kinali

Chuck Forsberg WA7KGX N2469R     caf at omen.com   www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
   Omen Technology Inc      "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430

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