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4-Port Coax Relay Partial Kit
Out of stock
The Ham Radio Workbench 4-Port Coax Relay project allows you to connect one radio to four antennas or four radios to one antenna. Two boards can be used to create sophisticated 4 to 4 switching matrix. This project gives you multiple ways to control the relays including local push button, local serial, XBee Wireless, and RS485. This project features:
- Connects one of four ports to a single device
- Handles up to 100 watts
- Can be configured to ground all ports
- Low Loss on HF, 6M
- PIC Microcontroller
- PC Control Software
- UART Pins to allow further control options
- Optional RS485 Control available</li><li>Optional wireless control via XBee radios available
This item includes the Printed Circuit Board and a Pre-Programmed PIC Microcontroller
Project Documentation and Parts List- https://www.hamradioworkbench.com/4-port-coax-relay.html
12V DC Power Strip Printed Circuit Board
The Ham Radio Workbench 12V DC Outlet Strip Printed Circuit Board allows you to build a device to share a single 12V power source with up to four other devices.
This board is designed to support communication activities using a single 100 Watt HF radio which does not operate at 100% duty cycle at full power, or a single 50 Watt FM VHF/UHF Radios that draws approximately 16A at 13.8VDC in QSOs.
The completed project features:
- Designed for Anderson Powerpole Connectors
- Total current capacity not to exceed 25 Amps @ 12V nominal total across all ports
- Four fuse holders that accept standard or low profile ATC fuses
- Polarity indicator for the 12V input to verify that your source is wired correctly
- An LED will light to indicate when a load is connected to an output port with a blown fuse
This item includes the Printed Circuit Board Only.
!!!CAUTION!!!
It is not recommended to operate at the Operational Maximum Current of 25A at 13.8VDC for periods longer than 5 minutes, as the copper traces of the 12V DC Outlet Strip can become hot, exceeding temperatures of 150F after an extended period (5 minutes or more) of constant 25A current draw. Temperatures can approach 200F when a constant 25A at 13.8VDC are drawn for periods of 10 minutes or more.
Full Project Documentation and Required Parts - https://www.hamradioworkbench.com/12v-dc-power-strip.html
A 3D Printed Case is available from Rocket City 3D - https://rocketcity3d.ecwid.com/Ham-Radio-Workbench-12V-DC-Power-Strip-Case-p114464423
12V DC Power Strip Complete Project Kit
This is a complete kit version of the 12V DC Power Strip project.
This board is designed to support communication activities using a single 100 Watt HF radio which does not operate at 100% duty cycle at full power, or a single 50 Watt FM VHF/UHF Radios that draws approximately 16A at 13.8VDC in QSOs.
It includes the following components:
- 1 Printed Circuit Board
- 12" 14 Gauge Solid Copper Wire
- 1 Green LED
- 5 Pair 30A Anderson Power Pole Connectors and Pins
- 5 Fuse Holders
- 5 Fuses
- 6 Red LEDs
- 7 1K Resistors
!!!CAUTION!!!
It is not recommended to operate at the Operational Maximum Current of 25A at 13.8VDC for periods longer than 5 minutes, as the copper traces of the 12V DC Outlet Strip can become hot, exceeding temperatures of 150F after an extended period (5 minutes or more) of constant 25A current draw. Temperatures can approach 200F when a constant 25A at 13.8VDC are drawn for periods of 10 minutes or more.
Project Build Documentation is available here - https://www.hamradioworkbench.com/12v-dc-power-strip.html
A 3D Printed Case is available from Rocket City 3D - https://rocketcity3d.ecwid.com/Ham-Radio-Workbench-12V-DC-Power-Strip-Case-p114464423
*PCB Standoffs not included
QRP Dummy Load Full Kit
Not only is this QRP dummy load kit a perfect introduction to soldering project, it also makes a handy piece of test equipment when working on low power radios. This dummy load is sized for up to 25 Watts of power in brief intervals. This unit will get hot if you transmit in to this unit for periods of 30 seconds or longer without breaks in between. Includes customer printed circuit board and all components needed to assemble.
Documentation for this project is available here: https://www.hamradioworkbench.com/qrp-dummy-load.html
