[time-nuts] LPRO questions...

[Alan Kamrowski II]

Hi Magnus,

Well, I went ahead and tried this again - 400 C, bulb spinning, back end of
bulb upwards, 75 seconds.  Kept the bulb in the same direction until it
cooled.  Lamp voltage did not go up, in fact it seemed to return back to
3.5V from 3.7V, but the lock time went down.  It was running just over 5
minutes to lock (5m 7s), but it has now locked twice at 4m 7s and 4m 15s...
I'm going to stop messing with it before I break it!!!!

Thanks,

Alan

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Magnus Danielson
Sent: Friday, September 06, 2013 1:59 AM
To: time-nuts at febo.com
Subject: Re: [time-nuts] LPRO questions...

Hi Alan,

I used a fairly crude heat gun, and I looked at the lamp and was able to see
when it had cleared since I had evaporated the rubidium from the glas. But
it was not extreme heat (it's a small heat-gun anyway) or particular long
time. I had to redo it and re-think it to figure out how to get the metal to
deposit where I wanted, and what worked for me was to let the deposit area
be high up, but it could just be that this was the part with most cooling,
so it could have dominated.

Cheers,
Magnus

On 09/06/2013 12:53 AM, Alan Kamrowski II wrote:
> Hi Magnus,
>
> Interesting.  What temperature C do you use and for how long?
>
> Thanks,
>
> Alan
>  
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] 
> On Behalf Of Magnus Danielson
> Sent: Thursday, September 05, 2013 4:24 PM
> To: time-nuts at febo.com
> Subject: Re: [time-nuts] LPRO questions...
>
> On 09/05/2013 10:45 PM, Alan Kamrowski II wrote:
>> Hi Bill,
>>
>> Where is the dimple?  The bulb end looked circular and smooth?  Do 
>> you mean the other end (back end which is visible even when the bulb 
>> is
> installed)?
>> The bulb end points towards the entire assembly...
> The back end as mounted is where you want it to deposit. When I did 
> it, it turned out that I better put the "window" side downwards so 
> that when the vapor rose as it was hot, it hit the cooler side above 
> it and settled there, that's how I reduced the shadowing on the window 
> to clear. The reason it's a bad thing is that this thin coating will 
> absorb exactly that wavelength you try to output.
>
> Cheers,
> Magnus
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