[sdiy] HAM temperature XTO

[Czech Martin]

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?

??

m.c.