ELECRAFT® K3 HIGH-PERFORMANCE 160 – 6 METER TRANSCEIVER KBPF3 GENERAL COVERAGE RECEIVE OPTION INSTALLATION INSTRUCTIONS Rev B1, October 28, 2007 Copyright © 2007, Elecraft, Inc.
Contents Introduction............................................................................................................................................... 3 Customer Service and Support............................................................................................................................ 3 Technical Assistance ....................................................................................................................................... 3 Repair / Alignment Service ....
Introduction This manual covers the installation of the KBPF3 General Coverage Receive option in your K3 transceiver. Only a few basic hand tools are needed (see page 5) to perform the installation. No soldering or wiring is required. The KBPF3 extends the receive coverage outside of the Ham bands over the range of 500 KHz to 30 MHz and from 48 MHz through 54 MHz. Only the receiver coverage is extended. The transmitter frequencies remain limited to the Amateur bands.
Elecraft 1-Year Limited Warranty This warranty is effective as of the date of first consumer purchase. It covers both our kits and fully assembled products. For kits, before requesting warranty service, you should fully complete the assembly, carefully following all instructions in the manual. What is covered: During the first year after date of purchase (or if shipped from factory, date product is shipped to customer), Elecraft will replace defective or missing parts free of charge (post-paid).
Inexpensive static dissipating work mats are readily-available that will steadily and safely drain off any charges built up on parts or circuit boards placed on them. They are supplied with a lead that connects the mat to the common workbench ground. Also, metal cabinets on test equipment used on the bench should be tied together and connected to the common ground. Most importantly, you must have a way of continuously draining off any static charges that occur on your body.
Parts Included The following parts should be included in your kit. Check to ensure you have them all. If any parts are damaged or missing, contact Elecraft for replacements (see Customer Service and Support, page 3). QTY. ELECRAFT PART NO. ESD Sensitive. Follow ESD safe handling procedures. Keep in ESD-safe bag until installed. 1 E850269 Standoff, 4-40, 1/2” (13 mm) 2 E700061 Screw, 4-40, 1/4” (6.
Installation Procedure Disconnect power and all cables from your K3. Remove the nine screws to free 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. 1 REMOVE 9 SCREWS HOLDING TOP COVER. 2 TO OPEN COVER, PRESS HERE TO TILT FRONT EDGE UP OR PLACE UNIT ON ITS SIDE FEET, THEN TIP FARTHER SO THE TOP COVER SWINGS OPEN. Figure 1. Removing K3 Top Cover.
Remove both bottom covers from the K3 by removing the screws shown in Figure 2. REMOVE ALL THE SCREWS INDICATED AND LIFT THE BOTTOM COVERS OFF. ESD SENSITIVE! WEAR A GROUNDED WRIST STRAP OR TOUCH AN UNPAINTED METAL GROUND BEFORE HANDLING THE RF BOARD. SEE NOTE SEE NOTE SEE NOTE NOTE: THESE THREE SCREWS ARE 1/4" (6.4 mm) LONG AND HAVE INSIDE TOOTH LOCK WASHERS UNDER THE SCREW HEADS. ALL THE OTHER SCREWS ARE 3/16" (4.8 mm) LONG AND HAVE NO LOCK WASHERS. Figure 2. Removing K3 Bottom Cover.
Install two standoffs on the RF board that covers the bottom of the K3 as shown in Figure 3. (Note that the stiffening bar across the top of the K3 chassis has been removed to show the positions of the standoffs more clearly.) ESD SENSITIVE! WEAR A GROUNDED WRIST STRAP OR TOUCH AN UNPAINTED METAL GROUND BEFORE HANDLING THE RF BOARD. TOP OF RF BOARD 4-40 1/2" (13 mm) STANDOFF 4-40 SPLIT LOCK WASHER 4-40 SPLIT LOCK WASHER 4-40 1/4" (6.4mm) ZINC PAN HEAD SCREW Figure 3. Installing KBFP3 Standoffs.
There are three connectors on the bottom of the KBPF3 board that must be properly mated to P44A, P44C and P44E on the RF board. Even though the connectors are hard to see, they can be aligned as follows: Set the KBPF3 board in place over the standoffs, aligning it so the holes in the KBPF3 board are aligned with the tops of the standoff. This will align the connectors.
Turn the K3 right side up to replace the top cover. Hold the top cover above the K3 and plug the speaker wire into P25 on the KIO3 board at the left rear of the K3 as shown in Figure 5. KIO3 BOARD IN BACK LEFT CORNER OF CHASSIS ORIENT CONNECTOR AS SHOWN TO SPEAKER Figure 5. Connecting Speaker Cable. Position the top cover on the K3. Note that the tab on the back center goes under the rear lip of the K3 rear panel. Secure the top cover with the nine 4-40 3/16” (4.
