[AMPS] The things you see Homebrew Amplifiers

[Bill Fuqua]

At 08:37 PM 10/7/99 -0400, you wrote:
>Sorry guys, but I couldn't pass this opportunity to interject here:
>
>
>Clandestine operations with an acytlene torch produce interesting
>conversation pieces and dandy old wives tales. Try as hard as I could with
>several different tubes, I could never get one to suck in from excess
>dissapation. I believe it takes a concentrated electron beam to cause such
>a thing. I'm guessing at that, I will bow to experts in that field as
>required.
>
>I have a few QST's from 1954 with an Eimac advertisement on the page (the
>pages were smaller then). They were demonstrating the advantages of
>ceramic/glass power grid tubes  (ie. 4cx150 ect) vs. glass envelope triodes
>(ie. 250TH etc). The picture shows the 250TL in a lump of molten glass in an
>oven while the newer style still retains it shape. I wish I had that picture
>as a poster. But it was an advertisement for Eimac.
>Cheers,
>Mike
>W3SLK
I have not seen it either. I have seen the EIMAC ad however. Also an
earlier ad with a hole melted in the anode of a 250TH I think.
If no one on this list has seen a hole sucked in the side of
a tube I would just write it off to mythology.
  I like the idea of the torch. I have seen our glass blower
make a neat hole in glass tubes with a torch.

73
Bill wa4lav


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