[DSP-10] Problems with 19,68 MHz oscillator - amp chain - C72 - need measurement help

[Marius Hauki]

I thought I had grilled U8 and replaced it with a MAR6 that has
very similar specs (that was what I had in stock). Had to do a slight change 
in bias setting resistor.
Still the waveform looks very distorted. I have measured on the oscillator 
side of C72 and the waveform looks good. On the MMIC side of C72 the 
waveform looks very distorted. Even with the new MMIC in place.
This leads me to suspect C72 ! Can somebody help me with placing a scope 
probe on both sides of C72 so I can get a report on how your waveform looks. 
Does it look good on both sides of C72 with respect to ground ?
Which color does your C72 have (I have the TAPR kit) ? My has a light brown 
color.

73 de la9eea
Marius





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