ELECRAFT K 2 Betriebsanleitung PDF herunterladen (Seite 14)

K 2 / 1 0 0 M A N U A L ( A p p e n d i x G ) E R R A T A

R e v . C - 3 , D e c e m b e r 1 4 , 2 0 0 4

P L E A S E R E A D B E F O R E Y O U B E G I N A S S E M B L Y

Important Notice

Your KPA100 kit includes recent circuit changes that allow the K2/100 to handle higher

mismatch conditions, allowing power reduction to start at an SWR of 2:1 rather than

1.5:1.

Since your kit is one of the first shipped with these enhancements, it may include an

unused toroid core, a few extra resistors, and an extra capacitor (the previous component

values).

Errata Items

1. Page 7, parts list: Change R4 from 100 k to 39 k. (Your kit may include an

unneeded 100 k resistor.) Add resistor R33 to the parts list (1 k, 5%, 1/4 W, BRN-

BLK-RED).

2. Page 13, left column, 2

assembly step: Change R4 from 100 k to 39 k.

3. Page 13: Cut out and tape this assembly step at the bottom of the right column:

__ Locate a 1 k, 1/4-watt resistor (R33). Trim R33’s leads to approx. 1/4” (6 mm)

long. Place the resistor across the leads of RFC3 (RFC3 is near the fan and the large

black RF choked marked “101”). Solder the resistor to RFC3’s leads.

4. Page 24, left column, first paragraph: The second sentence in this paragraph should

be replaced with: "Each toroid is wound on a specific type of core. One example is

type T44-2."

5. Page 24, right column, first assembly step: The reference to a T50-2 core in this

paragraph should be changed to T50-10.

6. Page 47: Cut out and tape this test step at the bottom of the left column:

__ Set your DMM for 200 or 300 VDC full-scale. Connect the (-) lead of the DMM to

ground (one of the KPA100 standoffs). Be ready to touch the (+) lead to the left side

of 180-k resistor R12 (the lead closest to RFC5). Turn on the K2 and select CW

mode. Set the power knob above 11 W. Hold the MODE button down 1-2 seconds to

enter CW TEST mode. Press the TUNE button and verify that the DC voltage at the

left side of R12 is 100-110 VDC or more. Exit TUNE by tapping any button. Exit

CW TEST mode by holding down the MODE button.

Schematic: On page 64, add R33 (1 k) across RFC3, in the T-R switch. On page 65,

change R4 from 100 k to 39 k in the High Voltage Bias Supply.

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ELECRAFT K 2 Betriebsanleitung Seite 14