[Amps] 5 Minutes for Ameritron 811H to warm up?

[donroden at hiwaay.net]

I just went out and measured a 100 year old pane of glass on my  
grandfather's shop.  No appreciable thickness change from top to bottom.

I wouldn't spend to much time watching for glass flow.

Don W4DNR



Quoting greg greene <greg.greene74 at gmail.com>:

>>
>>
>>
>> Actually, there is something wrong with that. Glass, technically, is a
>> liquid and flows very slowly under pressure, even at room temperature
>> over long periods of time. I believe this is the main reason glass
>> tubes are prone to become gassy after years of storage. I can't prove
>> it, but I believe this is why ceramic tubes are much less prone to
>> this problem since ceramic is a rigid crystalline solid.
>>
>> That's just my theory - comments welcome.
>>
>> Bill W6WRT
>>
>> *************************************
>>
> You are correct Bill, if you exam glass windows that are several years old
> you will find the bottoms thicker than the tops from the flow of the glass
> due to gravity.  Add heat from using the tube to accelerate the process and
> one can see how glass tubes could be more prone to failure than ceramic.
> I'm not aware of the formula for the glass used in tubes off shore but we
> can hope they are taking this into account when they manufacture them, but
> probably not.
>
> Greg VE7GPG
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