Owner`s manual

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TXGN{pwr}

[T]

(Troubleshooting.) Shows transmit gain constant for the present band and power

mode, where {pwr} = LP (0-12W), HP (13-120W), or MW (0.1-1.5 mW). The

gain constant is updated whenever the TUN E function is activated on a given

band at one of three specific power levels: 5.0 W, 50 W, and 1.00 milliwatt. See

transmit gain calibration procedure, pg. 49.

On 80 m with high power (> 13 W) selected, you should see PR8 0 as part of the

TXGN parameter display. This indicates that the preamp is turned on during QRO

transmit on 80 m, and is the default. It should only be turned off for

troubleshooting purposes; this is done by tapping P R E .

If TX ALC (above) is OFF , the TXGN parameter can be set manually, at very

fine resolution. This should only be done for troubleshooting purposes.

TXG VCE [T]

0.0 dB

(Advanced) Balances voice transmit peak power in relation to CW peak power

in TU N E mode. Typically set between -1.5 to 1.5 dB.

VCO MD [T]

SUB

NOR xx

(varies w/

VFO freq)

(Troubleshooting.) VCO L-C range view/change/calibrate. Once the VCO is

calibrated (pg. 49), the parameter which appears here will include NO R . You can

change the setting to troubleshoot VCO L-C ranges. When finished, set the

parameter back to NO R 12 7 , then exit the menu and change bands to restore the

original setting. Note1: In this menu entry only, the main/sub receiver prefix (R F

or SUB ) is not displayed at all times. However, the

SUB

icon will flash as usual

when S UB is tapped. Note 2: Tapping 8 before starting a VCO CAL will force it

to use “manufacturing” PLL voltage tolerances (TOL =MF G is flashed on VFO

B). These tolerances are more stringent than normal. This might be useful for

those using the K3 over a wider temperature range.

VFO Tuning Noise Reduction (Advanced): Tapping 1 in this menu entry

alternates between SPI 1 (default) and SPI 2. The SPI 2 setting may eliminate

a weak “ticking” noise sometimes heard in the vicinity of 5, 28, or 50 MHz while

rotating the VFO. Older K3s will require a simple RF board modification before

the SPI 2 setting can be used; without the modification, synthesizer tuning errors

may occur, and SPI 2 may not be effective. Contact Elecraft for details.

VFO B->A

Function

Copies VFO B’s frequency to VFO A. Cannot be used within the menu itself;

must be assigned to a programmable function switch.

VFO CRS

Per-mode

Per-mode coarse tuning rate (hold C O A R SE and tune VFO A or B). Tap 1 to turn

rounding on/off. Also applies to the RIT/XIT tuning knob if CONFIG:VFO OFS

is set to ON, and both RIT and XIT are turned OFF.

VFO CTS

200

VFO counts per turn (10 0 , 20 0 , or 40 0 ). Smaller values result in easier fine-

tuning of VFO; larger values result in faster QSY. Doesn’t apply to the C O A R S E

tuning rate, which always uses 100 counts per turn.

VFO FST

50 Hz

Specifies the faster of the two VFO tuning rates (R A T E ). The faster rate is 50 Hz

per step by default, but can be set to 20 Hz if desired. In this case, VFO CTS =

400 is recommended to ensure adequate fast-QSY speed.

VFO IND

If set to YES , VFO B can be set to a different band than VFO A, which allows

listening to two bands at once (main/sub). See pg. 37 for independent main/sub

band considerations.

VFO OFS

OFF

If ON, the RIT/XIT offset control can be used to tune VFO A in large steps when

both RIT and XIT are turned off. The step sizes vary with mode (see VFO CRS),

and are the same as the COA R S E VFO tuning rates.

WMTR {pwr}

[T]

100

Wattmeter calibration parameter. {pwr} is the power mode: LP (0-12W), HP

(13-120W), or MW (0.1-1.5 mW). See calibration procedure (pg. 49).

XVn ON

Tap 1 – 9 to select applicable transverter band (1 - 9). Set parameter to YES to

turn the transverter band on.