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1380 [2009/02/17 10:19]
n5na
1380 [2010/11/25 13:34] (current)
n5na
Line 18: Line 18:
 **1380 Demonstration by NG9D**\\ **1380 Demonstration by NG9D**\\
 {{youtube>​small:​ourfkobMfiM}} {{youtube>​small:​ourfkobMfiM}}
 +
 +===== Specifications =====
 +
 +==== General ====
 +
 +  ***Frequency Coverage:** VFO tuning of any 50 kHz segment of CW sub-band. Tuning range is selected during winding of one toroid in the VFO circuit.
 +  ***Frequency Control:** Varactor tuned oscillator with potentiometer control. Temperature compensated LC components stabilize VFO.
 +  ***Power requirement:​** 12-14 Vdc, 35 mA receive (no signal present), 80 mA receive (S-9 signal), 800 mA on transmit.
 +  ***Antenna:​** 50 ohm unbalanced, SO-239 connector.
 +  ***Construction:​** Black texture painted clamshell type steel top and bottom. Aluminum chassis, sub-panel and heatsink. One 3.5" x 5" double-sided circuit board.
 +  ***Board mounted-components:​** 216 including 4 IC's, 19 transistors,​ 13 diodes.
 +  ***Front panel controls:** main tuning, RIT, volume, power on-off toggle switch.
 +  ***Connectors:​** front panel 1/4" stero phone jack; rear panel SO-239 for antenna, 3 RCA-style phono jacks for key, dc input, accessory dc output.
 +  ***RIT:** +/- 1.5 kHz.
 +  ***Dimensions:​** HWD 2.75" x 6" x 6". Weight 2.25 lbs./1.02 kg.
 +
 +==== Receiver ====
 +
 +  ***Type:** single conversion superhet, JFET mixer
 +  ***Sensitivity:​** .25 uv typical for 10 dB S/N
 +  ***Selectivity:​** 4 pole crystal ladder filter (1 kHz nominal bandwidth).
 +  ***AGC:** audio derived
 +  ***I-F:** 11 MHz on 80 and 40 meter models, 14.32 MHz on 30 meter model, 6.14 MHz on 20 meter model.
 +  ***Audio:** 300 mW @ 4 ohms. Built-in 4" speaker in top of cabinet.
 +
 +==== Transmitter ====
 +
 +  ***RF Output:** 3 watts, no external adjustment.
 +  ***T/R Switching:​** solid state, full break-in.
 +  ***CW Offset and sidetone:** Adjustable 400-1000 Hz sidetone automatically tracks offset frequency. Sinewave sidetone has internal adjustment.
 +

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