[Laser] stable audio oscillator?

[Andrew T. Flowers, K0SM]

I started playing around with ARGO in my apartment this evening--one of 
the programs that Bob mentioned to receive QRSS morse code (thanks, 
Bob!).  I remembered that my ramsey kit transmitters have a setting to 
send a test tone using the 16KHz pulse-width modulation scheme.  Well, 
if you receive this at baseband audio you get alot of stuff between 
500Hz and 20KHz plus, but as it turns out, it is nice and stable 
because.  Lo and behold! it contains a 25MHz clock divided down to 
16KHz!  Anyway, if you enable the test tone, one of the strongest 
frequency compnents is 913.4 Hz  (15880 Hz is about 10dB stronger, but 
argo doesn't tune that high) .  I locked onto the 913.4 Hz and took my 
transmitter all over my 3-room apartment.  Believe it or not, the signal 
is *clearly* visible on the screen no from everywhere, including places 
where it has to make several reflections off of walls, floors ceilings 
or whatever.  It's really blows my mind.  It's making me believe that 
tropospheric scatter is possible using class II and IIIa diodes.

Now to steal that 16 KHz clock and divide it down a little more.  At 
least that kit will be good for something!  I appreciate all the 
suggestions I'm receiving regarding the AF oscillator--thanks!

Andy, K0SM