[time-nuts] Housing LPRO and Thunderbolt together

[EWKehren at aol.com]

Having over years looked down at Thunderbolt using GPS/Shera/Rb's and  
Cesium Standards I finally broke down and bought a Tbolt when there where some  
available for a day for $75. Decided at that price I can not go wrong. Now 
my  counters, Spectrum Analyzer and all Sig. Generators are fed by the Tbolt. 
I even  use the 1PPS in some applications as a GPS replacement.
There have been recent discussions of using a fan to keep constant  
temperature, something I highly recommend. Make it a stand alone unit with 1 PPS  
and 10MHz distribution front and back. With out kilo buck investment this  
will be the best. 14 NMH AA cells will make a nice simple backup unless you  
want to use switchers combined with linear regulators.
Now you can play with the LPRO, again I would use a small fan. 
Bert Kehren
 
 
 
In a message dated 4/22/2011 11:48:27 A.M. Eastern Daylight Time,  
g4gjl at btopenworld.com writes:

I have a  dilemma and wish to access the collective wisdom of the group to 
advise 
a  solution.

I am building a clock generator based on a Thunderbolt. I  have an LPRO and 
would 
also locate this in the same enclosure. I will also  add a distribution amp 
and a 
divide chain in due course.

The  ultimate purpose of the set up is to provide a self contained clock  
generator set for my other test equipment, and also an experimental  
workstation 
for Rubidium and GPS disciplined experiments.


Most  of my other equipment is for 19-inch rack mounting.

I have two  potential solutions for housing the timing kit:

1. An old dismantled HP  4U scope chassis which will fit in with my other 
equipment physically, and  can be racked if necessary. The PSU would have 
to be 
built into the same  enclosure.

2. A pair of Anritsu instrument cases which once house a bit  error test 
set. The 
two units clip together beautifully, and are free  standing. As there are 
two 
units, this solution would allow me to build  the PSUs in one case and the 
more 
sensitive timing electronics in the  other. These units cannot be racked on 
account of their form  factors.

Both solutions will require me to do some bespoke metalwork,  but that is 
no 
problem for me and amounts to about the same amount of work  for either 
solution.


So what does the group advise? Is it vitally  important to keep PSU 
components 
isolated from the timing electronics? I  want to create the least noisy 
clock 
source given the components I  have.

Looking forward to hearing some  opinions...

Pete
G4GJL
_______________________________________________
time-nuts  mailing list -- time-nuts at febo.com
To unsubscribe, go to  
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the  instructions there.