When building kits, some of the greatest modifications and upgrades often come from the individual builders. A popular kit recently put out by the Four State QRP Group is the 4S Dummy Load, a kit I have previously reviewed. The modification created by Jim Sheldon, W0EB, is very simple and requires no modification to the PC board.
The 4S Dummy Load is a 10-watt dummy load that incorporates 4 LEDs that indicate the power level being supplied by the ARP transmitter. I highly recommend connecting a dummy load to any QRP kit transceiver or transmitter during initial power up to prevent damaging the final output stage
