Elecraft KDVR3 User Manual

ELECRAFT K3 HIGH-PERFORMANCE 160 – 6 METER TRANSCEIVER KDVR3 DIGITAL VOICE RECORDER OPTION INSTALLATION INSTRUCTIONS Rev C, February 16, 2012

10 Hardware Upgrades The following changes have been implemented in newer K3s to avoid the possibility of shorts or intermittent operation in some

11Check the VFO B encoder and trim the pins as shown below if they haven’t been trimmed already to ensure they cannot short against the main DSP bo

12Turn the chassis upside down and position the front panel so the pins of P30 and P35 on the bottom of the RF board just begin to engage the conne

13Replace the left side panel (with the handle) as follows: Start the seven 4-40 3/16” (4.8 mm) black flat head screws through the panel: three alo

14Using the Digital Voice RecorderNote: You must have MCU firmware version 2.73 or later installed. The KDVR3 option allows you to record and play

2Contents Introduction ...

3Introduction The KDVR3 Digital Voice Recorder allows you to prerecord voice messages to be transmitted and to record received audio. The KDVR3is c

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

5 Wear a conductive wrist strap with a series 1-megohm resistor. If you do not have a wrist strap, touch a ground briefly before touching any sen

6Installation Procedure Removing the Front Panel Assembly Disconnect power and all cables from your K3. Remove the nine screws to free the top cov

7Remove the screw shown in Figure 3. It is located directly behind the front panel microphone connector. There may be a lock washer under the screw

8 CAUTION: Before continuing on with the next step, be sure you have removed the three top Front Panel Assembly screws shown in Figure 4. You may b

9With the three screws removed, the main DSP board is held on to the front panel board by two multi-pin connectors. Slip your finger tips between t