[Elecraft] New K3 field-test firmware: RIT on/off allowed during transmit; adjustable CW crystal-filter offset

[Wayne Burdick]

Hi all,

I'm looking for volunteers to test a few K3 firmware changes. See release notes below. If you'd like to try this firmware ahead of the next beta release, please email me directly.

73,
Wayne
N6KR

* * *

K3 MCU 4.72 / DSP 2.82, Nov. 10, 2013

* RIT CAN NOW BE TURNED ON/OFF DURING TRANSMIT: This applies to both the RIT switch and the "RT" remote-control command. Note: If RIT is turned on or off *during* transmission of a CW character, the length of one code element may be affected.

* CRYSTAL FILTER OFFSET ADJUSTABLE IN CW MODE:  You can now set the crystal filter lower edge in CW mode to 0.1, 0.2, or 0.3 kHz above zero beat. The default is 0.2 kHz. The 0.1-kHz selection provides enhanced bass response, but may allow you to hear a low-pitched opposite-sideband signal when tuned near very strong signals. The 0.3-kHz selection may be preferred by some operators in extremely strong-signal environments. To change the setting, select CW mode, then go into CONFIG:RX EQ and tap '0' (CWT) to choose the desired XFIL LO value.

* A>B SWITCH TAP SENDS VFO UPDATE IN "AI2" MODE: This is useful for those writing computer-control applications.