| Texas Ranger/RCI 6300F Texas Ranger/RCI 6900F |
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| Frequency Modification 1) Locate JP275. Move the jumper to pins 2 and 3. 2) Right behind JP275 is an empty socket labeled J2. 3) The 3 wire connector that leads from the Hi/Low switch goes to a socket on the main board labled J4. 4) Unplug the jumper from J4 and plug it into J2. For more modulation, remove Q39 which is the modulation limiter. If you change D30 and D31 from a 1N60 to ECG-583 diodes, this will improve your AM detection. Distant stations will come in stronger and clearer. If you use ECG-583 for D1 and D2, it'll give you a more effective noise blanker. You'll notice the difference more so in a mobile set-up than a base set-up. |
| VR1 AM/FM S-Meter VR2 SSB/CW S-Meter VR3 SSB/CW S-Meter VR4 AM/FM Squelch VR5 FM Deviation VR6 SSB Carrier Balance VR7 TX Frequency VR8 CW Sidetone Monitor VR9 RF Meter VR10 Final Bias VR11 Final Bias VR12 Driver Bias VR13 SSB ALC VR14 AM/FM High Power VR15 AM Modulation Meter VR16 AMC VR17 SSB Power VR18 AM/FM Low Power |