On Mon, 15 Mar 2004 17:42:59 -0600, John Fields
wrote:

What???

Yup!!!

According to your schematic, the input to R1 is a 2.16MHz square wave
and L1VC1 is a parallel tuned tank, (filter) tuned to 10.8MHz. So is
L2VC2C7. If you're not trying to do any filtering, what are those tanks
doing in there?

The frequency of the square wave is actually 3.43Mhz (IIRC) the figure
you quote from the schematic is the *period.* Plus, the tanks are
actually shown tuned to 18.75Mhz (well the first one is, anyway, but
since they're variable caps they can be tweaked for the desired
frequency of 17.2Mhz. I've no idea how you've arrived at 10.8Mhz!
Yes, I realise tanks are a form of filter hence in prior postings I've
stated I'd not used any form of filtering *other than* the tanks.

--

The BBC: Licensed at public expense to spread lies.