Lester Veenstra wrote:
The typical test supply on a bench for clean VCO testing is a small gel cell
battery. For a regulated power supply, make one using a 723. The 723 has
far lower noise out than the monolithic regulators.
Depends on the variety of 723 some are noisier than others.
Some use an internal zener reference, some use a bandgap reference.
The original used a zener reference.
Bruce
Lester B Veenstra MØYCM K1YCM W8YCM
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-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Richard (Rick) Karlquist
Sent: Wednesday, January 30, 2013 9:17 PM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Low noise power supplies?
I know this topic has been discussed in the past on the list, but a
colleague is asking if there are any off the shelf low noise power supplies
for testing oscillators. Something a cut above an HP "brick" lab power
supply etc. They are hoping to avoid having to homebrew a power
conditioning circuit.
Did we ever arrive at a concensus as to the state of the art in homebrew
power conditioning circuits?
Any help would be appreciated.
Rick Karlquist N6RK
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