Dr Ronald Stiffler SEC technology

[NickZ]

me too !

Just had a look at the crystal and it's a COMCLOK CT31AH
Am not finding info on it, but some quick tests with grounding and Vcc'ing have shown that the in series LED on Vcc brightens when an L3 is connected from the output to it. A 0.1uF cap, similarly connected as a tank, seems to make the scope read either 9MHz or 15MHz, flickering between the two. Am sure the loading is the thing because of the noted changes of waveform too.
Will try the 1K etc ideas of Gyula's from the previous page.

   Slider:
  Your mentioned signal generator has an output of 1v p_p.  That may not be enough juice to capacitively fire the Leds. 
   So, what are you thinking of doing to obtain a 20 plus volt, 13.4MHz signal? 

[Slider2732]

Good question.
This DDS buffer amplifier is one route:
http://www.pongrance.com/dds-buffer.html
Changing some values will allow higher throughput.

Have just tried bunches of coils and bunches of caps on the 'illegal' 27MHz crystal.
The waveshape certainly changes, sometimes more rounded, sometimes better wireless 'range', but it is resolute in it's lack of wish to change from 9MHz.
47pF, 56pF, 30pF, 10pF, 0.1uF. Coils have been from a few aircore turns of 20AWG, to axial inductors. All do change the characteristics and waveshape, but nothing makes it budge in frequency. Even tried connecting from the output to Gnd and to Vcc with all the configurations and still no change. Just once or twice it would seem to flicker at 15MHz and then drop back to 9MHz again. That could easily have been the L3 coil interfering, which is connected to the output.
Does the output need a cap in series to decouple, 0.1uF, when the LC is in place ?

Btw, comical note.
I was just trying to verify if the AD9851 is really an upgrade to the AD9850 and saw this one advertised:
https://www.ebay.com/itm/DDS-Signal-Generator-Module-AD9851-2-Sine-Wave-2-Square-Wave-Replace-AD9850-GT/273146456861
Within the specs, was this gem of a line:

Clothes Asian size is usually 2 yards smaller than US/EU/UK, please compare carefully before ordering.

[TinselKoala]

The COMCLOK CT31AH is a 5v tri-state oscillator and comes in a variety of different frequencies. It should have the frequency stamped on it.

https://i.ebayimg.com/images/g/g0EAAOxyyjpRurq3/s-l1600.jpg
One pin is Vcc, one pin is ground, one pin is output, one pin is enable/disable.

[Slider2732]

That's it squire, exactly the same one

Tri-state, as in
1. Off
2. Thinking about switching on
3. 1/3rd On

[TinselKoala]

Another component that might be useful for this kind of thing is the Hitachi 1SS106 diode.