DréCB's CB/HAM RADIO Information Site -o- Cherokee AH 27 Alignment Information -o-

STEP	SETTING	CONNECTION	ADJUST	ADJUST FOR
1	RX Sensitivity; Mode: Receive Volume: Fully Clockwise Squelch: Fully Counterclockwise CH: 19 SSG: 28.185MHz, 1KHz Audio tone 1 uv(-107dBm), 30% AM modulation	Connect RF signal gererator to external ANT Jack. Connect SSVM, Sinadder and distortion meter across EXT-SPeaker output jack with 8 Ohm load resistor	T1 T2 T4 T5 T6	Adjust the parts of tuning circuitry with observing ADM "Automatic Distortion Meter" indicates 10 dB S/N in AM mode, and adjust output level of RF-SSG until speaker out level reaches about 500 milliwatt (2.0 Volts) -adjust for Maximum indicatiom ON†SSVM
2	Squelch Adjustment: Mode: Receive Volume 500mW(2.0V) Squelch: TIGHT CH: 19 SSG: 28.185MHz, 1KHz Audio tone 2.815 uv(-38dBm), 30% AM modulation	Connect RF Signal generator to external ANT jack. Connect RF Power meter and distortion meter across EXT-Speaker jack with 8 Ohm load resistor.	RV-1	Adjust the point until the audio output appeared on scope
3	Squelch Adjustment: Mode: Receive Volume 500mW(2.0V) Squelch: Fully Counterclockwise CH: 19 SSG: 28.185MHz, 1KHz Audio tone 100 uv (-67dBm), NO†MODULATION	Connect RF Signal generator to external ANT jack. Connect RF Power meter and distortion meter across EXT-Speaker jack with 8 Ohm load resistor.	RV-2	Adjust so that the 9th LCD Bar display on the LCD signal meter has just been set.

STEP	SETTING	CONNECTION	ADJUST	ADJUST FOR
1	RF Driver stage; Mode: Transmit Volume: N/A Squelch: N/A CH: 19	Connect oscilloscope probe to base of Q18	T9 T10	Adjust for Maximum wave form on the oscilloscope.
2	RF Power Stage; Mode: Transmit Volume: N/A Squelch: N/A CH: 19	Connect dummy load and RF power meter to the external ANT-Jack.	T11 RV-105	Adjust for Maximum indication on the Power meter, not to exceed 4Watts
3	Second Harmonic check; Mode: Transmit Volume: N/A Squelch: N/A CH: 19	Connect RF Power meter with dummy load to spectrum analyzer through coupler -40dB atten. to EXT ANT jack.	†	At no modulation, compare the level of fundimential freq-spectrum to the level of harmonic freq-spectrum. Suppression of the 2nd Harmonic must be down at least 60 dB.
4	Frequency Check Mode: Transmit Volume: N/A Squelch: N/A CH: 19	Connect dummy load and frequency counter through coupler to RF Power meter. Also connect power meter to EXT-ANT jack.	CT-2	Make sure that the indication of the transmitter frequency is 27.185 MHz +/- 300Hz on the frequency counter.
5	Modulation check: Mode: Transmit Volume: N/A Squelch: N/A CH: 19	Connect dummy load and modulation meter through coupler to RF Power meter. Also connect power meter to EXT-ANT jack.	RV-4	Adjust for 90% +/- 5% indication of modulation.