The manual for Drake ENGINEERING's Four Filter Switch Kit provides detailed instructions on the installation, setup, and operation of 2-, 3-, and 4-filter switch kits, including the mounting of components on the PC board and the removal and replacement of existing shields. It also covers troubleshooting procedures such as grounding unused filters to prevent degradation and ensuring proper connections and soldering techniques to avoid issues during operation.

• Brand: Drake
• Model: ENGINEERING
• Type: manual
• File size: 935.0 KB

Manual Overview

The Drake ENGINEERING manual provides detailed instructions for installing and troubleshooting the Four Filter Switch Kit, which includes two PC boards with relays and sockets. The system integrates the original 8-kHz filter, the CF-600/6 CW filter, and two SSB filters. The CF-600/6 is mounted on a replacement shield under the receiver chassis, with the PC board on the i-f side for easy access to connections. The manual emphasizes the importance of grounding unused filters to prevent signal degradation.

For troubleshooting, the manual outlines the correct installation of sockets and jumpers on the 3-4B board, specifying positions based on the number of filters used. It provides guidance on soldering techniques to avoid solder bridges and details the placement of capacitors and diodes. The removal of the existing shield and installation of the CF-600/6 and 3-4B board are described, including adjustments to ensure proper alignment and connection.

The manual also covers the installation of the SSB Filter Switch Kit, which involves mounting the SSB filters and switching hardware on a PC board attached to the preselector bracket. Proper alignment and soldering of components are crucial to ensure functionality.

Quick Issues Covered

• Diagnose relay failures in the 3-4B board switch kit.
• Error codes for incorrect filter socket installation.
• Schematics for circuit tracing on the 3-4B PC board.

Overview

Sherwood Engineering Inc.’s Four Filter Switch Kit is designed for installation in 2-, 3-, and 4-filter configurations. The kit includes two PC boards with relays and sockets, part numbers 3-4B and SSB. It supports a four-filter system comprising an original 8-kHz filter, a CF-600/6 CW filter, and two SSB filters. The CF-600/6 filter is mounted on a replacement shield under the receiver chassis, and the PC board is mounted on the i-f side with spacers for easy access. The relay switch kits automatically ground unused filters to prevent degradation of the selected filter. The manual provides detailed instructions for mounting components, installing the CF-600/6 and 3-4B PC board, and setting up the SSB filter switch kit.

Specifications

Refer to the PDF for details.

Controls & Indicators

Refer to the PDF for details.

Installation / Setup

The installation of the Four Filter Switch Kit involves several key steps. The kit includes two PC boards with relays and sockets, and it is designed to switch between different filters in a receiver system. The CF-600/6 CW filter is mounted on a replacement shield under the receiver chassis, and the PC board is mounted on the i-f side with spacers for easy access to connections. The relays automatically ground unused filters to prevent degradation of the selected filter.

When mounting components on the 3-4B board, sockets are inserted and aligned with positioning aids on the board. Depending on the filters being switched, sockets are installed in specific positions, and jumper wires are used for two or three filter configurations. Soldering is required for these connections, and a small-tipped, low-wattage soldering pencil is recommended.

Additional components such as disc capacitors and diodes are mounted and soldered to the board, with specific instructions for their placement and connection to the ground bus. Bare wires are also soldered for connections to filters and a transformer.

The existing shield in the receiver must be removed to make room for the new filter and board. This involves unsoldering and discarding certain wires and removing the shield. The CF-600/6 filter and 3-4B PC board are then mounted with specific hardware, and connections are soldered to complete the assembly.

The completed assembly is installed back into the radio, ensuring that wires and components are not pinched or obstructed. Final connections are soldered, and hookup wires are attached to relay control points for switching between filters. The SSB filter switch kit is also installed, with filters mounted on a PC board and attached to the preselector bracket using adhesive tape.

Operation

Refer to the PDF for details.

Troubleshooting & Error Codes

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Safety & Warnings

Refer to the PDF for details.

Download ENGINEERING Manual (PDF – 935.0 KB)

Guide for installing 2.3 and 4 filtering kits in Drake R-4C Sherwood model. Includes step-by-step instructions for technicians.

• Brand: Drake-r-4c-installing-2-3-4-filtering-kits-sherwood
• Model: ENGINEERING
• Type: Manual
• File size: 935.0 KB

Overview

Brief overview of the product.

Specifications

• Key spec 1
• Key spec 2

Controls & Indicators

Control panel/button layout.

Installation / Setup

1. Step 1…
2. Step 2…

Operation

Basic usage, modes, cycles.

Troubleshooting & Error Codes

Safety & Warnings

• Important warning…

Downloads

Download ENGINEERING manual (PDF)