tube shields

[Patrick]

Measured the outside of the shuields and the top of the tubes thru the top 
hole with the laser temperature gauge, the tube shields were painted inside 
and outside, as I said before, the temperature differential was minimal. 
Note that I am not a scientific Lab. only reporting to the reflector a 
personal experiment done to satisfy my curiosity. Regards.....Pat...Please 
no more questions.
----- Original Message ----- 
From: "kd4e" <doc at kd4e.com>
To: "Patrick" <brookbank at TRIAD.RR.COM>
Cc: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Tuesday, November 13, 2007 4:30 PM
Subject: Re: tube shields


> Did you test them painted black inside *and* out?
>
> How about testing them painted *inside only* , please?
>
> Also, did you control for air flow vs stagnant air?
>
> Inquiring minds want to know!
>
> :-)
>
> > Patrick wrote:
>> For what is worth...I have measured the temperature of tubes with black 
>> tube shields (Military) and shiny ones and the difference is minimal, 
>> between 1 to 3%, depending on tube type.On the other hand, painting the 
>> shiny tubes with ultra flat black paint obtained the same results. The 
>> measurement was done using one of these new laser temperature gadgets and 
>> the paint used was Americas Finest by Rust-Oleum HD2876 ultra blat 
>> black..
>
>
>
> -- 
>
> Thanks! & 73, doc, KD4E
> Personal: http://bibleseven.com/kd4e.html 


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