Chip for the Ultimate3S QRSS/WSPR kit, v3.12a. This is the ATmega328 chip.

Note that this is the chip for the NEW Ultimate3S Kit, not the older retired Ultimate (U1), Ultimate2 (U2) or Ultimate3 (U3) kits! This chip is not compatible with the old kits! If you need a firmware chip for the older kits U1, U2 and U3 that can be purchased on other pages in this shop.

Version history: please see http://www.qrp-labs.com/ultimate3/u3firmware.html

NOTE: 18-Dec-2021: The ATmega328 chip is now unobtainable at any distributors, due to the global semiconductor shortage. We have managed to obtain stock to be able to continue offering this item, however, the price was very high and this has necessitated a temporary price increase of $2.79 which is currently included in the price of this item.