[HBR] That General Coverage HBR Project -- 2

[N2EY at aol.com]

In a message dated 10/20/06 7:05:29 AM Eastern Daylight Time, 
waltah at ntelos.net writes:


> Bill said:
> > I have some things I want to try that will take advantage of VXO
> > methods, too, related to my observations during maintenance of crystal
> > controlled radios. Right now I just have a pipe dream. If I get a good
> > result I will surely share. If it turns out to be something too silly to
> > mention...I will just keep quiet <grin>. Unless somebody else asks "what
> > about...." Then I would spill those beans.
> 
> But Bill, if you do something that turns out too silly to mention and 
> you keep quiet, that means I have to do it too!  I have my very own 
> silly ideas!

Me too!

One of the most important functions of engineering is figuring out what 
*won't* work before committing lots of resources to it. 


> 
> One of the most interesting things about this list is hearing what other 
> people are doing, building, restoring, and what all. Learning what 
> doesn't work well is probably the most useful part of that.  I've been 
> writing some further adventures with the VXO thing that I'll probably 
> post today, but the short story is, doing it again from scratch this 
> isn't where I'd start for a BFO that must tune a frequency range as 
> large as ~0.1%.
> 

Did you try the Elecraft trick (two identical xtals in parallel in a VXO)?  
(Actually it's just one of their ingenious tricks).

73 de Jim, N2EY