The RH-20 kit shipped with the following specifications: Size 5" x 5" x 2" nominal Weight 1 lb. 2 oz. (515 g) +/- your soldering style! Mode CW only Keying Semi-break-in, all electronic, TiCK-1 (Rev. 1.02) keyer built in. 1/8" stereo jack connection Frequency control VFO, varicap diode tuned, 10 turn pot main tuning control and center detent RIT control with approx. +/- 2KHz range (user adjustable) Stability Approx. +300Hz drift first 30mins, +50Hz drift per hour thereafter Frequency counter AFA, accurate to within 1KHz, manual and automatic modes - internally user selectable Frequency range A (nominal) 70KHz segment of the CW end of 20m (14MHz) - internally user selectable Antenna 50 Ohms, BNC connector Output power 0 to 5 Watts nominal (7 Watts typical) - internally user adjustable Output protection 2SC1969 output device is SWR protected - will run into open or short circuit loads Output match Better than 1.5:1 into 50 Ohms nominal Output spectrum Relative to main carrier at 5W output, all harmonics -70dB or better, all spurii -50dB or better Receiver Single conversion superheterodyne, JFET pre-amp, high level double balanced mixer Receive sensitivity MDS -133dBm nominal I.F. 9MHz Receive filter 4 crystal main filter, 1 crystal unwanted sideband noise filter Receive bandwidth 300Hz nominal Stopband atten. -70dB typical AGC Audio derived, 1 PIN diode + SA612 method AGC range 100 dB typical Audio output 1W into 8 Ohms from an LM380N, 1/8" stereo jack output connector Power supply 10V to 14V D.C. Negative ground, 2.5mm power jack (center pin is positive) Receive current 160mA typical (idle with background noise) Transmit current Depends on output power setting - user adjustable - and power supply voltage. Transmit efficiency ~ 60% efficient (class C output stage).
Below are some pictures of my personal Red Hot NorCal 20. Click on any picture to see it full size.
