[sdiy] Help with oscillator

[Magnus Danielson]

Tim Ressel skrev:
> Hi all,
> 
> I have been humbled by the most simple of circuits: an oscillator. Its one of those crystal oscillators used everywhere. The circuit is here:
> 
> http://circuitabbey.com/files/EqualTog_sch.pdf
> 
> Its the circuit in the upper left corner: U6. This same circuit worked fine on the first board. I have since swapped the crystal and 18p caps from the working board to the bad one, but no joy. The output at pin 6 has about 4 KHz on it, and pin 1 has no signal at all, just a DC bias. I tried cleaning the board with flux remover. Now even the 4KHz signal is gone. 
> 
> Any ideas? Thanks in advance.

Using a schmitt-trigger inverter there is totally wrong. The 10 M 
resistor is there for it to self-bias into a linear amplifier.

Cheers,
Magnus