Narrowband (100 Hz) superhet receiver, as used in the MSF Clock, with outputs for 3 kHz (audio) IF, "S" meter and serial data (8 V = carrier, 2 V = break) - including all decoding details to extract accurate Year, Month, Weekday, Date, Hours, Minutes and Seconds with automatic GMT/BST and leap year - and leap seconds, Basic listings for local, GMT and sidereal time, receives Rugby (callsign MSF - "standard frequency") 60 kHz atomic time signals, accurate to 1 part in 10^13 (300µs in 100 years), built-in antenna, 1000 km range (provision for external antenna beyond), 50dB agc range, easily retuned 10-150 kHz, 50 dB agc, connections by terminal block, polarity protected, needs 12 V at 10 mA. 5 x 8 x 15 cm, 250 g.

"your design is the best", RM in Staffs.

"worked first time", SJP in Cheshire.

This fun-to-build kit includes all parts* as well as detailed assembly and operating instructions, all decoding details and needs only a meter and speaker to tune. The kit includes a ready-cut piece of copper laminate and full size foil pattern for easy drawing, etching and drilling of the circuit board. The circuit board is 146 mm long, single sided with wide tracks and generous spacings as shown here

and the kit includes ordering details for etch resist pen and ferric chloride. * The receiver needs a 3.5mH inductor for L2, Toko part number CAN1A350EK which sales@modecomponents.co.uk can supply, 2 dual gate mosfets such as 3SK85, 40673, 3N201 or BF988A (Farnell stock number 663-712).

If someone wants to offer a PCB (drilled or undrilled) for this kit, then their contact details can be announced here.