Contest logging software for winning CW, SSB, RTTY, and PSK31.

MK-1100 Keyer Firmware

All MK-1100's shipped had either version 10.26, 10.32 or 10.38 firmware.

Version 10.32 of the MK-1100 introduced two new features:

	Support for the Headphones Toggle function This command puts the headphones on the radio without the transmit focus (the “second” radio), or back on the transmit radio if they were already on the second radio.
	Support for the Radio Tune function Commands CW key down until you type any key or press a paddle.

The keyer firmware version is printed on the label of the chip inside the keyer. It is not necessary to open the keyer to determine if you have the old 10.26 version of the firmware. Simply make sure your keyer is powered up and connected to WriteLog, and click WriteLog's Radio menu entry. If the Headphones Toggle and the Tune entries are gray (disabled) then you have version 10.26 (or the keyer isn't connected yet--can WriteLog send CW over the keyer? if so, it is connected).

Version 10.38 of the MK-1100 firmware introduced:

	Headphones unlatch works regardless of whether they are currently latched
	PTT off from the PC does not overide paddle input

Version 10.74 of the MK-1100 firmware was introduced after the MK-1100 ceased production. A limited number of upgrade chips were produced. Contact K5DJ for availability.

PTT on command from the PC ignored while paddles are active. (Observed when auto-CQ is interrupted by paddle input. Subsequent time for auto-CQ would turn on PTT. Fixed in 10.74)

If your keyer has the older firmware, the keyer can be upgraded by ordering the part from K5DJ and installing it. The part is a 28 pin DIP integrated circuit that replaces the existing socketed part.

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