Leigh W3NLB ) writes:
On Thu, 17 Jul 2003 19:11:57 +0200, "Tom" wrote:

Hello

If anyone can recommend me a good book from which i will learn to construct
oscillator that for example covers range 0-12 MHz.

Thanks in advance!
Tom


12 MHz is easy. 0 MHz is really difficult.


73 de Leigh W3NLB

The workaround is to have a variable oscillator beating against a fixed
oscillator. So you have your variable oscillator going from 30 to 42MHz
(I just picked those out of my hat), a fixed oscillator running at 30
MHz, and a mixer fed with both oscillators. The output of the mixer will
be 0 to 12MHz (plus some other things).

Michael VE2BVW