Model 1254 combines the satisfaction of the kit building experience with the performance features expected in a modern HF receiver. Building one’s own receiver from a kit has launched countless thousands of people into communications careers or the hobbies of amateur radio and shortwave listening (“SWLing”). You will build a true dual-conversion superhet with a microprocessor-controlled frequency synthesizer. Digital LED readout. Alignment is easy and does not require complicated equipment. You only need a volt-ohm meter and your ear; the kit provides its own 45 MHz test signal. Project skill level: Intermediate. Not recommended as a first-time kit building project. Estimated build time: 15-20 hours.
Frequency coverage: 100 kHz – 30 MHz
Modes: AM, SSB, CW
Clarifier control for +/- 1.5 kHz SSB/CW fine tuning between 2.5 kHz steps
Front panel controls: ON/OFF switch, Tuning, Volume, Clarifier, Mode Select, Memory Write, VFO/Memory tuning select, Tuning Rate Speed
15 programmable memories
Circuit: Synthesized 45-75 MHz local oscillator, 45 MHz first I-F, 455 kHz second I-F
Sensitivity: AM mode, 2.5 uV for 10 dB SNR at 30% modulation, SSB/CW mode, 0.5 uV for 10 dB SNR
Selectivity: 4 kHz @ -6 dB
6 digit green LED frequency/memory display with mode indicators
Power supply: 12-15 Vdc, 250 mA current consumption with no signal present. 15 Vdc @ 800 mA wall transformer for 110 VAC operation included with kit.
Antenna connector: 50 ohm input, RCA-style female phono jack
Audio: 1.5 watts audio output to internal speaker, plus 1/8 inch front panel stereo phone jack for headphones or external speaker
Semiconductors: 10 IC’s, 26 transistors, 16 diodes
Compact size: 2.25″ x 6.5″ x 6.5″ HxWxD
Construction: Steel clamshell case, aluminum chassis, plastic molded front panel. Speaker inside top of steel clamshell, top-firing
The SDR.hu project has been finished
“I’d like to say a big thanks to everyone who joined my journey with this project!
I hope you had a good time listening on the site, and learnt some things about SDR. The purpose of this site...