RESONANCE EFFECTS FOR EVERYONE TO SHARE

[gotoluc]

Thank you armagdn03 for all this information

Also a big thanks for making this new coil setup and a great video demonstration showing different inductive loads being attached without the need to re-tune

Great stuff ... thanks for continuing to help us all by sharing

Luc

[gotoluc]

@everyone,

I just uploaded a new video "test 10"

Link: http://www.youtube.com/watch?v=auFYEFBrwls

Luc

[Cap-Z-ro]

Yep...you shouda took the easy out at 1st.

[Groundloop]

Hi All,

I'm sorry to report that my fixed oscillator switch (najman100 PCB) will not work as it is designed!

I have soldered up the PCB and tested the circuit today. First I found a design flaw, pin 16 on
the CD4009 was not connected to +12 volt. This is easy to correct, just solder a wire between
pin 1 and pin 16 on the IC.

After I corrected some soldering errors (mine) then I got the circuit as described in the drawing.
But, I encountered another problem, the crystal oscillator will NOT run. First I thought that I
had used a crystal frequency that was too high for the 4009 so I changed the crystal to 4 MHz
just to check. Still the oscillator did NOT run correct. I then rechecked the data sheet for
the CD4009 and saw that the IC does not have smith trigger inputs. So the oscillator will
not run with this IC no matter what I do.

The rest of the circuit performs well so I will modify the circuit to use an external oscillator input.
Attached is the updated drawings for such a circuit.

Again, I'm very sorry to have made such a huge mistake and wasted time for everybody.
As I said, the circuit will still work with an external oscillator from a signal generator.

Groundloop.

[gotoluc]

Yep...you shouda took the easy out at 1st.

Hi Cap-Z-ro,

I don't understand your comment ... could you explain a little more of who or what you are referring too?

Thanks

Luc