[R-390] S 2nd Crystal Oscillator Alignment

[Flowertime01 at wmconnect.com]

S 2nd Crystal Oscillator Alignment
When adjusting the 2nd Crystal Oscillator you can hear the noise peak 
better than you can measure it with the meter. Peak the caps up with both the 
meter and head phones.

___ 01 Meter the local audio output across a 600 Ohm load
___ 02 Meter the diode load for - 7 volts DC
___ 03 Use a good set of head phones to monitor the audio output
___ 04 Set the function switch to CAL
___ 05 Set the BFO OFF
___ 06 Set the KHz to 500
___ 07 Set the KHz to 31
___ 08 Set the Bandwidth to 2 KHz
___ 09 Rock the KHz to produce maximum indication on the diode load
___ 10 Set the Local Output meter range to provide a mid scale reading
___ 11 Use the head phones to hear the noise peak as you make adjustments
___ 12 Screw the slug of T401 out until only one peak can be obtained while 
turning trimmer capacitor 31 through its entire range.
___ 13 Set trimmer capacitor slightly away from peak
___ 14 Adjust the slug in T401 for peak output
___ 15 Readjust capacitor 31 and ensure it has two peaks.
___ 16 Adjust capacitor 31 to peak (watch the meters for best indication)
___ 17 Move the MHz down one detent (you can hear the noise peak)
___ 18 Adjust the corresponding capacitor to peak
___ 19 Stop at 8MHz
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