[time-nuts] Low noise power supplies?

[SAIDJACK at aol.com]

Or a good battery as a source for the regulators as discussed in this  
thread already.
 
It's quite nice to have all the different Voltages available at the same  
time, with up to 200mA.
 
bye,
Said
 
 
In a message dated 1/31/2013 13:12:33 Pacific Standard Time, lists at rtty.us  
writes:

Hi

For $393.75 does it come with a wall wart? 

If not  I would definitely go for a "medical" ground isolated / low leakage
version  to power the beast. The added cost over a plain jane wall wart 
won't
add  much to the purchase price percentage wise.

Bob

-----Original  Message-----
From: time-nuts-bounces at febo.com  [mailto:time-nuts-bounces at febo.com] On
Behalf Of SAIDJACK at aol.com
Sent:  Thursday, January 31, 2013 3:58 PM
To: time-nuts at febo.com;  lester at veenstras.com
Subject: Re: [time-nuts] Low noise power  supplies?

Not sure if anyone posted this here yet, but Abracom has a  very low noise  
(7nV/RtHz at 1KHz) power source for VCO's etc, with  various outputs. It's 
sold  on DIgikey or Mouser I think.

Here  is a review of that  unit:

_http://jaunty-electronics.com/blog/category/reviews/_  
(http://jaunty-electronics.com/blog/category/reviews/)  

Co-incidentally he also has a review of one of our units on the  same  page.

This is a very handy and reasonably priced power  supply for many  
low-noise 
type of  experiments.

bye,
Said


In a message dated 1/30/2013  21:36:50 Pacific Standard Time,  
bruce.griffiths at xtra.co.nz  writes:

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
> lester at veenstras.com
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> -----Original  Message-----
>  From: time-nuts-bounces at febo.com  [mailto:time-nuts-bounces at febo.com]  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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