Elecraft KTCXO3-1 Bedienungsanleitung PDF herunterladen

Elecraft  www.elecraft.com P.O. Box 69  Aptos, CA 95001-0069 (831) 763-4211  Fax: (831) 763-4218

ELECRAFT



Installing the KTCXO3-1 TCXO

Revision F1 – December 16, 2013

The KTCX03-1 is an optional ±1 ppm (± 0.5 ppm typical) temperature-compensated crystal oscillator that

replaces the standard crystal oscillator on the K3 Reference Oscillator board.

Contents

The kit components are as follows:

1. KREF3 TCXO Oscillator Module, 49.380 MHz.

2. Insulator (rectangular, fits bottom of TCXO module)

3. Tie wrap.

Tools Needed

You will need a Phillips screwdriver and cutters to trim the tie wrap. Long nose pliers are handy for installing the

tie wrap. A wrist strap grounded through a 1-megohm resistor is strongly recommended to protect your K3 from

ESD damage.

Installation Procedure

Disconnect power and all cables from your K3.

Remove the top cover as shown in Figure 1. After the cover is open, lift it gently to reach the speaker wire

connector. Unplug the speaker then set the top cover aside in a safe place.

REMOVE

9 SCREWS

HOLDING TOP

COVER.

TO OPEN COVER,

PRESS HERE TO

TILT FRONT EDGE UP

DO NOT

REMOVE THE

FOUR SCREWS

AT THE CORNERS

OF THE SPEAKER

OPENING.

PLACE UNIT

ON ITS SIDE FEET,

THEN TIP FARTHER

SO THE TOP COVER

SWINGS OPEN.

Figure 1. Removing the Top Cover

CAUTION:

Touch an unpainted metal ground or wear a grounded wrist strap before

touching components or circuit boards inside the K3.

Locate the KREF3 circuit board. It is mounted against the metal shield running across the width of the K3

near the front panel (see Figure 2).

Cut and remove the tie wrap holding the oscillator module in place. Notice how the tie wrap runs under the

socket to hold the module. In a later step you’ll need to install the new tie wrap in the same manner.

1 2

ELECRAFT 1
REPLACE ALL THE SCREWS! 2

Inhaltsverzeichnis

Seite 1 - ELECRAFT

Elecraft  www.elecraft.com P.O. Box 69  Aptos, CA 95001-0069 (831) 763-4211  Fax: (831) 763-4218 ELECRAFT K3 Installin

Seite 2 - REPLACE ALL THE SCREWS!

2 Remove the existing oscillator module. If needed, remove the coaxial cables plugged into the KREF3 board. Pull only on the metal connector. Do no

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