[time-nuts] 5070B once more....

[Rob Kimberley]

I don't know this product, but from my past experience if it has a split
primary transformer for switching between 115 and 230 VAC, check to see if
fan is 115VAC. If it is and you run unit on 230VAC, the fan can cause
increased residual noise due to the imbalance. Better to use a 230 VAC fan
if running on that supply.  

Just a thought..

Rob K

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Roy Phillips
Sent: 20 May 2009 10:16
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 5070B once more....

Hello Pierre-François
A point of personal interest in your email  - -  The noise of the fan in the
5070B, this would appear to be a problem with a number of the older items of
Hewlett Packard, and other manufacturers.
The items are usually  fitted with a Papst fan,with a high throughput of air
running from the power line.  Has anybody tried to replace these fans with a
more modern type (12/24 volt). I'm sure the designers were being very
proper, but I cannot believe that a counter should require such a large
volume of air moving through it ? I have an EIP 545 Counter and an HP 5335A
which both have Papst fans and are very noisy Any ideas on this.
Roy

 ----- Original Message -----
From: "Pierre-François (f5bqp_pfm)" <pfmonet at wanadoo.fr>
To: <time-nuts at febo.com>
Sent: Wednesday, May 20, 2009 9:54 AM
Subject: [time-nuts] 5070B once more....


> Hi The Gang,
>
> I've revitalized my 5070B I got few years ago and since a week or two it 
> has seen again passing into it few electrons after so long... lol...
> Now I'm wondering which software I could use to grab data from it to the 
> PC and then to analyze the buffers to see the stability of my rubidium 
> source synchronised with the 1pps coming from the GPS.
> I've on a dedicated PC (XP) a GPIB/USB adapter for this application. Could

> you tell me which sw I could use to do this?
> I want to avoid to reivent the wheel by writing another piece of software.
>
> The 5070 (A or B) is really a great piece of hardware, I love it, exept 
> its noisy fan...
>
> Very good idea to invite Dave Chu to join the group, I'm sure his heart 
> will vibrate to see that his baby is still alive for a very long time... 
> ;-))
>
> Best 73's to all of you.
> pf, F5BQP
>
>
> _______________________________________________
> 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.
> 



_______________________________________________
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.