Ranger TR127FS
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Basics: 40 channel CB radio, front panel mike connector, SWR calibration, clarifier to clarify incoming signals, and built in SWR meter.
Controls: Volume, squelch, mike gain, RF gain, clarifier, and SWR calibrate.
Switch Functions: On/off, CB/PA, instant channel 9, NB/ANL on/off, tone H/L, and SRF/SWR/CAL.
Included Accessories: Stock mike, mike hanger clip, mounting bracket, side mounting screws, power cord, and owners manual.
Dimensions: W 7.25" x D 9.5" x T 2.25"
Warranty: 1 year MFG warranty
Condition: New Retail Box (NOT Refurbished)
Ranger feature comparison guide

The performance tune up increases the radio's output by approximately 50%. The receiver gain is typically 30-40% over stock specs. This modification includes the following changes in order to enhance the radio's performance.

Turning up the Transmitter's wattage
Adjusting the modulation for maximum output without distortion.
Modifying the mike amp circuit for more gain when necessary.
Aligning the receiver for optimum signal to noise ratio.
Adjusting the squelch range

Calibrate the transmit and receive meter settings.
Frequency adjustment to zero tolerance.
Perform a complete check of all functions.
Perform a visual of the circuit board for flaws.