ELECRAFT KPA3 Spezifikationen

ELECRAFT K3 HIGH-PERFORMANCE 160 – 6 METER TRANSCEIVER KPA3 100-WATT AMPLIFIER OPTION INSTALLATION INSTRUCTIONS Rev G, July 25, 2011 Copyri

10Hold the KRX3 module by the two brass knurled nuts on the top, and lift it straight up to gain access to the small TMP coaxial connectors plugged

11Installing the KPA3 Shield Remove the three screws, washers and standoffs (on the bottom of the RF) board shown in Figure 6. Save the lock washer

12Place a black 4-40 3/8” (9.5 mm) flat head screw through the hole in the back panel and the tab at the top edge of the shield as shown in Figure

13 On the KPAI03 board, install a 5/16” (7.9 mm) 4-40 standoff near K1 as shown in Figure 10. Use the exact hardware shown. This is important so th

14Assembling the Fan Panel Locate the fan panel and mount the fans as shown in Figures 12 and 13 using 4-40 7/8” black flat head screws and acorn n

15Install the 20A circuit breaker in the small hole with the pushbutton on the same side as the fans as shown in Figure 13. Position the fan panel

16Installing the KPA3 Amplifier Module Your KPA3 module may produce a rattling sound when shaken. This is normal. It is caused by ferrite beads sl

17 Position the fan panel you assembled earlier behind the opening at the rear of the K3 and connect the leads as shown in Figure 16. Figure 16. C

18Dress the fan leads so they are well clear of the fan blades. Check to ensure both fans turn freely. Figure 18. Positioning the Fan Leads. K3

19Replacing the Covers REPLACE ALL THE SCREWS! The K3's chassis has excellent rigidity despite its light weight. The screws that hold the top

2Contents Introduction ...

20Hold the top cover above the K3, route the speaker wire under the stiffener bar and plug it into P25 on the KIO3 board at the left rear of the K3

21Circuit Description The KPA3 option consists of three subassemblies: the KPA3 power amplifier, a fan panel to provide cooling, and the KPAIO3 int

3Introduction This manual covers the installation of the KPA3 100-watt amplifier option in your K3 transceiver. Only a few basic hand tools are nee

4Preventing Electrostatic Discharge Damage There is no climate or work location where the components of your K3 are safe from Electrostatic Dischar

5We strongly recommend you take the following anti-static precautions (listed in order of importance) to avoid trouble:  Leave ESD-sensitive part

6Parts 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

7ILLUSTRATION DESCRIPTION QTY. ELECRAFT PART NO. Rear Shield 1 E100217 Screw, 4-40, 1/4” (6.4 mm) Zinc, Pan Head 9 E700005 Screw, 4-40, 1/4” (

8Remove 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. Un

9 K3 KIT BUILDERS: If you are installing the KPA3 as part of the initial K3 kit assembly, skip the following steps and resume with Installing the K