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This is the new "All-In-One" synthesized transmitter and keyer that I finished building September 17, 2000.  It operates on 182.200 kHz repeating the message "BRO ".  It transmits in BPSK for the first half of each hour and in CW for the second half of each hour.  The schematics, artwork, instructions ... for this design also came from the web site of Lyle Koehler, K0LR.  I etched the PC board in the usual way using the iron on method of applying the resist to the board.  This is also described on Lyle site.  I used transparency material for plain paper copiers.  I made two transparencies of the artwork and ironed on one, removed it and ironed the second over the top of the first.  This seemed to make up for the fact that I could not get the first transparency off of the board without some voids.

This is a picture of what is in the box at the base of the antenna as of 10/18/00.  The white box contains the transmitter shown above.  The three meters were pulled from some scrape equipment and I made the new faces with a PC drawing program, printed them out and used double sided carpet tape to put them in the meters.  The one on the left reads PA current, the center one reads signal strength (it is driven from the recorder output of the selective level meter I have in the house) and the one on the right reads RF current.  Between the signal strength meter and the RF current meter is a small switch that selects either 150mA or 200mA full scale ranges for the RF current meter.  The small twisted pair of wire that comes off of this switch goes to a toroidal coil (current probe) that is around the input of the variometer that tunes the antenna.  The variometer can be varied from about 50 to 200 uH.  Its output is attached to the feed through insulator (and thus the antenna loading coil) that can be seen to the right of the RF current meter.  Go to the New LF Antenna page to see the loading coil.