Elecraft W2 Watt-meter Manual User Manual

ELECRAFT W2 WATTMETER OWNER’S MANUAL Revision D1, January 2, 2013 Copyright © 2012, Elecraft, Inc. All Rights Reserved

10 Place the 1/8” (2.9 mm) spacer under regulator U3 and temporarily secure it as shown in Figure 2. It is important that the spacer stay in place so

11 Mate plug P1 on the bottom of the main board with jack J1 on the front panel board as shown in Figure 5. Note that one pin on P1 has been removed a

12 Remove the screw holding the spacer between U3 and the pc board and mount the bottom cover as shown in Figure 7. Be careful not to dislodge the sp

13 Install a 1/4” (6.4 mm) black pan head screw into the mounting hole for the PTT RY connector as shown in Figure 10. Do not tighten this screw! It

14 Mount 2D fasteners with 3/16” (4.0 mm) black pan head screws at each end of the rear panel cover as shown in Figure 10 (A). Install one fastener a

15 Mount both side panels on the W2 display unit using three 3/16” (4.0 mm) black flat head screws in each panel. Do not use lock washers. Start all

16 Directional Coupler The directional coupler sensor used to provide RF Power and SWR a measurement is furnished completely assembled and tested to e

17 Appendix A Parts List W2 Circuit Boards ILLUSTRATION DESCRIPTION QTY. ELECRAFT PART NO. W2 Main PCB Assembly 1 E850353 W2 Front Panel (FP) PCB

18 W2 Hardware (E850356) ILLUSTRATION DESCRIPTION QTY. ELECRAFT PART NO. 2-D Fastener 6 E100078 4-40, Lock washer, #4, Split Z 7 E700004 Black

19 Cables These cables are provided with both the factory-assembled and kit versions of the W2. ILLUSTRATION DESCRIPTION QTY. ELECRAFT PART NO. Powe

2 Contents Introduction ...

20 Appendix B – Schematic Diagrams 5544332211D DC CB BA ARt Angle at Rear PanelPin 4 is keyedMount on Bottom Cover2009030901 AW2 Power MeterB11Saturda

21 5544332211D DC CB BA APin 4 is keyed2009030902 AW2 Power Meter: Front PanelB11Tuesday, May 26, 2009TitleSize Document Number RevDate: SheetofPOWERS

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25 SERIAL INTERFACE CABLE

26 Appendix C – Power On Modification With this modification the W2 will turn on when 12VDC is applied without pressing the POWER button. The modifica

3 Introduction The Elecraft W2 is a versatile, auto-ranging RF power and SWR meter that utilizes remote sensing. Up to two remote sensors can be att

4 Specifications Display Unit Size (H x W x D) 1.8" x 6.1" x 4.5" (4.6 cm x 15.5 cm x 11.4 cm), not including connectors. 5.1” (13 cm

5 Operation Typically the W2 is inserted between the transmitter and an antenna tuner, if one is used. The W2 then displays the SWR presented to the

6 Rear Panel REAR PANEL CONNECTOR NOTES: 1. A power cable is provided with your W2 with a mating connector for the W2 at one end and tinned leads f

7 Directional Coupler (Sensor) A directional coupler is used to measure RF power and standing wave ratio (SWR). A typical directional coupler is shown

8 SWR Alarm Function If set, the SWR Alarm will cause all the LEDs to flash in unison if the SWR exceeds 3:1 and triggers the relay that opens the cir

9 Tools Required 1. #0 and #1 size Phillips screwdrivers. Use the screwdriver that best fits the screw in each step. To avoid damaging screws and nu