[sdiy] HAM temperature XTO

[Scott Gravenhorst]

Czech Martin <Martin.Czech at Micronas.com> wrote:
>HAM freaks are interested in absolute frequency adjustment, because of
>heterodyning. 
>
>I just saw an article (1970), where a rod of aluminium (5x5 cm^2) was carved
>so that all oscillator stuff could be placed within. In other words:
>massive housing with 10mm walls.
>
>The author claimed that temperature will rise, too, but very isotropic.
>He also recommended isolating the outside to keep external heat out,
>as much as possible. It was also claimed that the temperature stability was
>within 5 Hz during a session, even if the transciever was dropped
>3cm on a hard surface.
>
>The oscillator design was temperature compensated, but of course: linear.
>
>btw.: what does HAM really stand for
>
>Home Amateur radio
>Home Amplitude Modulation
>Hungry Apes Massacre?
>Home Amateur Man?

My dad and his friends were HAMs.  I asked him, and
your suggestions are as good as his.  Hams used
FM too, even in the 1940s.  I had a book that some
complete asshole stole from my locked desk...
The 1940 ARRL Handbook.  Talk about COOL looking
projects.  Some of those 'long lines' oscillators
looked like Frankenstein's Lab Equipment.  I learned
basic electronics from that book.  I sure miss it.

How about this from the wife's perspective:

"Has Another Man"


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