More detail information on Pocket Two Way Radio Walkie Talkie: www.dealextreme.com – 1.4″ LCD display – Frequency range: VHF136~174, UHF400~470 MHz – 99 Channels – 5/6.25/12.5/25KHz – Working voltage; 3.7V – Battery: 1500mAh – Frequency Stability: -30 ~ +60 degree Celsius – Antenna impedance: 50 ohm – RF Power Output: 2W – S/N ratio: 45dB/42dB – FM range: 87~108MHz

Testing of a newly-built 160 metre AM transceiver at Chelsea on Port Phillip Bay near Melbourne. The receiver featured in a previous video. The transmitter is similar to the one presented here: www.angelfire.com It is crystal controlled on 1843 kHz. A centre-tapped 15 volt 1A power transformer is used for modulation. Efficiency is quite high – total Tx power consumption is 1A for approx 7 watts out on peaks. The IRF510 final stage does however need to be presented with an acceptable antenna impedance otherwise distortion can appear on the output, as happened here (the switched inductor in series with the antenna has since been replaced). The transmitter’s circuit is described in ‘Lo Key’ September 2011 – published by the CW Operators QRP Club.
Video Rating: 5 / 5

9 replies
  1. Aaroneus76
    Aaroneus76 says:

    Real small perfect for carrying around outside car I have a crosslink to the mobile radio as a repeater UV3-3R on ebay from 50$

    Reply
  2. DealExtremeDV
    DealExtremeDV says:

    @alandude58 Sorry, it’s Chinese. 🙁 But we have others in English, you can search in our DX home page. dx dot com. 🙂

    Reply

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