[time-nuts] HP 5065A rubidium lifetime

Ralph Smith ralph at ralphsmith.org
Sun Mar 21 21:31:53 UTC 2010


Naval Jelly, sold under numerous brand names. Phosphoric acid is also available in flooring departments of the big home improvement stores, used for removing grout haze from ceramic tile.

Ralph

On Mar 21, 2010, at 5:23 PM, Robert Atkinson wrote:

> There is a common use for Phosphoric acid. It's used as a rust conversion compound. Jenolite is a trade name in the UK, not sure about in the USA.Oh, and it's in Coke, hence the old penny cleaning trick.
> Robert G8RPI.
> 
> --- On Sun, 21/3/10, paul swed <paulswedb at gmail.com> wrote:
> 
> From: paul swed <paulswedb at gmail.com>
> Subject: Re: [time-nuts] HP 5065A rubidium lifetime
> To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
> Date: Sunday, 21 March, 2010, 20:43
> 
> Were do you obtain a small amount of phosphoric acid????
> Also when I looked it up they said it was H3PO4. Doesn't sound like the
> same.
> Is there a common use for it?
> 
> On Sun, Mar 21, 2010 at 1:58 PM, randy hunt <randy_hunt960 at yahoo.com> wrote:
> 
>> Try measuring a known length of the resistance wire, say 6 inches and then
>> double. . .
>> 
>> Randy
>> 
>> Hi
>> 
>> Next step would be to figure out what a reasonable ohms / foot number
>> is.
>> 
>> Bob
>> 
>> 
>> On Mar 21, 2010, at 12:41 AM, Chuck Harris
>> wrote:
>> 
>>> HP just wound two parallel wires around the cylinder.  They
>> did not
>>> twist.  The wires at the entrance end of the solenoid went to
>> the
>>> electronics, the wires at the exit end of the solenoid were
>> shorted
>>> together... I think they used a crimp for the short.
>>> 
>> 
>>> -Chuck Harris
>>> 
>>> J. L. Trantham wrote:
>>>> Do you
>> make a 'twisted pair' and then wind that or just wind two parallel
>>>> 
>> wires around the cylinder?
>>>> Joe
>>> 
>>> 
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>> 
>> 
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