[time-nuts] Any thoughts on best rubidium?

[Will Matney]

David,

The FE-5680A is always plentiful, and a lot of them are generally mounted
on a PC board, from pulls, along with having a decent price. The main thing
is availability, which means spare parts if you need them. I also know that
I've seen these used as internal timebases for counters before on the
larger HP types.

The LPRO-101 is almost as plentiful, and where it's in a flat package,
similar to the FE-5680A, it can be internally mounted in the larger
counters.

The SLCR-101 doesn't seem to be as plentiful, but some of these are
supposed to have a new type lamp, with longer life. They generally cost a
bit more too.

The FRS-C, if I recall, are older units, and are boxy, which makes them
harder to mount in thin chassis, if you want to add them inside a counter,
etc. However, they are generally cheaper, and if you're using a home brew
cabinet, size doesn't really matter then.

I have only used the FE-5680A, myself, and can recommend it, but have read
quite a bit about the others in the past. I also think that long-life lamps
are available for most of the newer units too.

Best,

Will





*********** REPLY SEPARATOR  ***********

On 7/11/2011 at 12:37 AM Dr. David Kirkby wrote:

>I'm looking to get a rubidium source to use as a reference for a spectrum 
>analyser, frequency counter or similar test equipment. All these need a 10
MHz 
>input.
>
>I've looked on eBay and found a few that seem to be in plentiful supply
>
>* EFRATOM 10MHZ LPRO-101
>* FE-5680A
>* SLCR-101
>* Efratom 10MHZ Rubidium FREQUENCY Standard FRS-C
>
>Is there any reason to chose one over another for the application I have?
>
>Is there any seller to avoid or you can suggest is particularly good? I
want to 
>import this to the UK, but are not bothered where it comes from, as long
as the 
>seller is reliable.
>
>Dave
>
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