[sdiy] Error on the SoundBite board!

[Eric Brombaugh]

Paul Schreiber wrote:
>>> R20 was 100K change to 1M
>>>
>>> R21 was 1K, change to 100ohms.
>>
>> Not having the schematics here, what were these resistors?
>>
> These are resistors used with the crystal and a 74HCU04 hex inverter to 
> form the crystal oscillator.

Just got my board yesterday. Hooked it up to the RF spectrum analyzer 
and saw that the crystal was running at 22.9994MHz (instead of the rated 
24.576MHz) and had a lot of nasty sidebands.

Used solder wick & fresh liquid rosin to wick off the excess on R20/R21, 
flipped them off the pads & cleaned it up. Bent the leads on some 1/8W 
axial leaded resistors to match the pad spacing, soldered them down. 
Looks ungainly, but works.

Now the spectrum analyzer shows 24.576MHz as intended and no sidebands 
within the resolution of the analyzer.

Recommended fix. I probably ought to get out of the dark ages here and 
shop for a selection of SMD resistors though. Any suggestions on 
economical vendors?

Eric

BTW - has anyone actually written/tested any code for the SoundBite yet? 
Just curious...