Ranger TR-296

CHASSIS EPT014811Z

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Software for Ranger TR-296

Adjustment

Test equipment required:


Power Supply: 13,8 V	Frequency Counter	Dummy Load 50 ohm	Oscilloscope
	DC Amperemeter	RF SSG	AF SSG

Preparation alignment:


Clarifier	Mid.
SQ GAIN	Max.
AF GAIN	Max.
RF GAIN	Max.
MIC GAIN	Max.
MOD, S/RF	S/RF
NB/ANL	Off
Channel	19

Item	Setting	Adjust	Measurement
	PLL ALIGNMENT
VCO Voltage	Set radio to CH 1, AM RX mode. Clarify setting in 12 o’clock position. Connect DC Voltmeter to TP9 (R207). Connect Oscilloscope to TP10 (R101). Connect Oscilloscope to TP1 (R106).	L19 L21 L20	2.5 VDC ą 0.1 CH 1 & CH 40 Max. Output and Balance.
AM Frequency	Set radio to CH 1, AM RX mode. Connect frequency counter to TP1 (R106).	L23	34.76500 MHz ą 20 Hz
LSB Frequency	Set radio to CH 1, LSB RX mode. Connect frequency counter to TP1 (R106).	L22	34.76350 MHz ą 20 Hz
USB Frequency	Set radio to CH 1, USB RX mode. Connect frequency counter to TP1 (R106).	L59	34.76650 MHz ą 20 Hz
TX Frequency	Set radio to CH 1, AM TX mode. Connect frequency counter to TP1 (R106).	VR5	34.76500 MHz ą 20 Hz
AM TX Frequency	Set radio to CH 19, AM TX mode. Set Mic Gain fully counter clockwise.	L31	27.18500 MHz ą 20 Hz
LSB TX Frequency	Set radio to CH19, LSB TX mode. Set Mic Gain fully clockwise. AF signal 25 mV, 1 KHz to microphone.	L30	27.18400 MHz ą 20 Hz
USB TX Frequency	Set radio to CH19, USB TX mode. Set Mic Gain fully clockwise. AF signal 25 mV, 1 KHz to microphone.	CT2	27.18600 MHz ą 20 Hz
	TRANSMITTER ALIGNMENT
BIAS Current	Set radio to CH 19, USB TX mode. MOD off. Connect current meter to TP8 (+) and green lead wire (-). Connect current meter to TP7 (+) and violet lead wire (-).	VR8 VR9	30mA 50mA
AM TX Power	Set radio to CH 19, AM TX mode. Connect RF power meter to antenna jack.	L48, L47 L46, L45 L38, L36 L38 VR10	RF Power Output MAX Balance Power between CH 1 and CH 40. 4W.
SSB ALC	Set radio to CH 19, USB TX mode. Set Mic Gain fully clockwise. AF signal 25 mV, 1 KHz to microphone.	VR11	12W
SSB Carrier Balance	Set radio to CH 19, USB TX mode. Connect Oscilloscope to L44 (TR39C). Mic Gain off.	VR4	Spurious Emission to minimum.
AM Modulation	Set radio to CH 19, AM TX mode. Set Mic Gain fully clockwise. AF signal 30 mV, 1 KHz to microphone.	VR7	90%
RF Power Meter	Set radio to CH 19, AM TX mode. MOD off.	VR6	Adjust RF Power meter needle until it is in-between the green and red bar on PWR scale.
	RECEIVER ALIGNMENT
AM Sensitivity	Set radio to CH 20, AM RX MODE. Clarify setting in 12 o’clock. Set RF gain fully clockwise. Set SQ fully counter clockwise. Set VOL control to 2 o’clock. Set NB/ANL to OFF position. Connect RF SG to antenna jack. Frequency 27.205 MHz, Level 1 uV. MOD 30%, 1KHz. Set radio to CH 40 AM mode. RF SG setting 27.405 MHz. Set radio to CH 1 AM mode. RF SG setting 26.965 MHz.	L13, L15 L3, L4, L5 L6, L7, L8 L9, L10	Audio output > 2V S/N > 10 dB
USB Sensitivity	Set radio to CH 20, USB RX mode. MOD off. Set VOL control fully clockwise. RF SG setting 27.206 MHz, Level 1 uV.	L12, L14	Audio output > 4.5V S/N > 20 dB
LSB Sensitivity	Set radio to CH 20, LSB RX mode. MOD off. VOL control fully clockwise. RF SG setting 27.204 MHz, Level 1 uV.	L12, L14	Audio output > 4.5V S/N > 20 dB
NB/ANL Adjust	Set radio to CH 20, AM RX mode. RF SG setting 27.205 MHz, Level 100 uV. MOD 30%, 1KHz. Set NB/ANL/OFF switch to NB/ANL. Connect Voltmeter to D2 (Cathode).	L1, L2	DC voltage to max. ( >1.5V )
AM Squelch	Set radio to CH 20, AM RX mode. Set SQ control at fully clockwise. RF SG setting 27.205 MHz, Level 1 mV. MOD 30%, 1KHz.	VR3 Slowly	Adjust very slowly until quelch just open
AM S/RF Meter	Set radio to CH 20 AM RX mode. MOD off. Set S-RF/CAL/SWR switch to S/RF position. RF SG setting 27.205 MHz, Level 100 uV.	VR1	Meter needle to S9 on the S scale
SSB S/RF Meter	Set radio to CH 20, USB RX mode. MOD off. Set S-RF/CAL/SWR switch to S/RF position. RF SG setting 27.206 MHz, Level 100 uV	VR2	Meter needle to S9 on the S scale

Microphone Connection

Pin	Description
1	Microphone Ground
2	Microphone
3	RX Key (Connect to Ground)
4	Ground
5	TX Key (Connect to Ground)

COMPONENTS

Cobra User Manual Ranger User Manual TR-296 Schematic Diagram RCI-8719 PLL Frequency Synthesizer (Ranger) MB-8719 PLL Frequency Synthesizer (Cobra and Uniden) TDA6130 TX Mixer AN612 Balanced SSB Modulator TA7222AP Audio Power Amplifier 2SC1969 RF Finale Transistor

Improved receive gain

Quieting of AM reception and improving gain of incoming signals is a common request from radio operators. In the first stages of the HF input 2SC1674 transistor can be found. This transistor is responsible for the amplification of a small detected signals. A problems exist if the transistor itself is noisy as is such the case of the 2SC1674 when compared to other low noise packages. Along with the amplification of the incoming signals is transistor noise. Replacement of this transistor with a higher gain, lower noise transistor greatly improves the signal to noise ratio of your receiver.
We will use an 2SC2999 transistor that has higher gain lower noise characteristic. Replace the 2SC1674 (TR14) with an 2SC2999 (or similar low noise and high gain transistor) to achieve this improved signal to noise ratio.
Re-Adjust L4 and L5/L6
The gain will improved with more than 6dB with the same signal to noise ratio.