[time-nuts] LPRO questions...

[wb6bnq]

Alan,

It won't be splattering, but more of a shadowing or dull glazing, kind 
of like gray colored sun glasses.  The heating is to cause the sun glass 
effect coating the glass bulb to go back into a gas and, when cooled 
down it will solidify, pooling into the DIMPLE that should be oriented 
in the down position to collect said pooling.

It is a very small amount of Rubidium material grayish silver in color.  
The only purple is when heated to the gaseous state it is excited as a 
plasma by an external RF signal around 100 MHz.

So, the two big questions are was it heated long enough to cause all the 
material to go back in to a gas form and then while cooling it was held 
fixed so the DIMPLE was pointed down long enough ?  Hopefully you got it 
right, otherwise try again is all you can do.  Personally, I don't think 
60 to 90 seconds would be long enough, but I don't actually know that, 
just a feeling.  If you got it right, perhaps there are other issues 
like part values that have drifted.

Bill....WB6BNQ

Alan Kamrowski II wrote:

>Hi,
>
>Well, I had it apart so I went ahead and tried the heating process on the
>lamp.  I don't see any splattering on the lamp at all of purple material,
>but I added some masking tape to the threads and put it in a drill to rotate
>it.  I hit it with a hot air station at 350 deg C and rotated it for 60-90
>seconds or so.  The end result is a lamp that went from 3.5V to 3.7V.
>
>Did I do it long enough or hot enough?  The repair guide I saw said
>something about a hot air gun and those can be 300-600 deg C...
>
>Thanks,
>
>Alan
>
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