Details

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BUY SW-339 https://www.utsource.net/itm/p/12591233.html

Parameter	Description
Model	SW-339
Type	VHF/UHF Dual Band Receiver
Frequency Range	VHF: 118-174 MHz, UHF: 400-520 MHz
Sensitivity	VHF: ≤0.2 μV, UHF: ≤0.3 μV (12 dB SINAD)
Selectivity	≥60 dB at ±10 kHz
Audio Output	200 mW (into 8Ω speaker)
Power Supply	DC 12V ±10%
Current Draw	≤200 mA
Dimensions	160 x 100 x 35 mm
Weight	Approx. 400g

Instructions for Use:

1. Powering the Device: Connect the SW-339 to a suitable 12V DC power source using the provided power cable. Ensure correct polarity.
2. Frequency Selection: Use the frequency dial to select the desired frequency within the VHF or UHF band.
3. Band Switching: Press the band switch to toggle between VHF and UHF bands.
4. Volume Control: Adjust the volume knob to set the preferred listening level.
5. Squelch Setting: Turn the squelch control to reduce background noise when no signal is present.
6. Antenna Connection: Connect an appropriate antenna to the SO-239 connector on the rear panel for optimal reception.
7. Operation Environment: Operate the device in a well-ventilated area to prevent overheating.
8. Maintenance: Keep the receiver clean and dry. Avoid exposing it to excessive moisture or direct sunlight.

(For reference only)