🚀 go-pugleaf

aslt@acad2.alaska.edu writes:

>What is important is broadcast frequency stability over the long term 
>(as in months if not years) with varying temperatures, humidity, 
>supply voltages, phase'o'th'moon, etc.  At first guess, this means 
>crystal-based design to me, but maybe there are other ways...

If you really want broadcast frequency stability, a crystal is the
minimum you should consider for frequency control.  In fact, true
broadcast stability would require a _good_ crystal, not a cheap
grunt one, but you probably don't really need it _that_ stable.

Interestingly, I was just thumbing through an old GE transistor manual,
and saw a circuit for a crystal-controlled FM transmitter--using a
tunnel diode!  But just try to find one ;-)