[Amps] Drake L4 with 3-400Z photos

[Bill Fuqua]

         Speaking of photos with the cover off. I have taken some photos 
like these before and I am amazed that up close that my digital camera 
still works. I expect that some don't work in intense RF fields. Also, one 
day while working on my 4-1000A amplifier I received a phone call. I was 
looking at the insides while it putting out a bit more than 2kW CW into a 
dummy load. It was not until after I finished the short call that I 
realized I was exposing the cordless phone to the strong RF field.  I guess 
the reason it did not occur to me sooner was that the phone was working 
just fine.
         So, why is it that they can't  make TV sets that will tolerate 
much weaker RF fields from our antennas half a block away?  TV's have very 
little or no EMI shielding in them.

         Oh yes, about the photos,  it looks like the glass envelope of 
tube on the left is scintillating due to electron bombardment. Nice red 
anodes as well.

73
Bill wa4lav



At 10:33 AM 10/14/2005 -0500, Keith Dutson wrote:
>What a neat set of pics!  I love the look of plasma in the dark!  Thanks for
>sharing.
>
>73, Keith NM5G
>
>-----Original Message-----
>From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
>Behalf Of Jason Buchanan
>Sent: Thursday, October 13, 2005 11:19 PM
>To: amps at contesting.com
>Subject: [Amps] Drake L4 with 3-400Z photos
>
>
>All this talk about AC mains got me stirred up to take some nice photos of
>Glow.
>
>I took the cover off my Drake L4 and took a few photos using a 60mm f/2.8D
>micro Nikkor.
>
>http://n1su.us/tubes/3-400Z-bias.JPG
>http://n1su.us/tubes/3-400Z-idle.jpg
>http://n1su.us/tubes/3-400Z-pair.jpg
>http://n1su.us/tubes/3-400Z-pair2.jpg
>
>
>Enjoy.
>
>73 Jason N1SU
>
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