Extender
About the Extender PCB
Extender is an open source PCB design by kholia, published on GitHub. It is a 2-layer board measuring 31.3 × 44.3 mm, with 7 components from 6 distinct parts.
By type, the board carries 2 connectors and 2 diodes.
It belongs with the rf & radio designs in this gallery.
From the project
VU3CER's non-RF-sensing, MCU controlled Simple T/R Switch with RX Grounding!
This is a non-RF-sensing, MCU PTT-controlled Simple T/R Switch with RX Grounding feature which can be built for less than 2 dollars!
It was designed, and tested for https://github.com/kholia/Easy-Transceiver project.
TX power is 10W from IC-705 operating in FM mode.
- With a 2-channel relay as a T/R switch, when both RX Ground and Center are disconnected and left floating, a voltage of around ~2.2v is induced across RX connections which is unsafe for typical SDRs.
Extender bill of materials (BOM)
7 components, 6 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CH1 | TerminalBlock_bornier-3_P5.08mm | J1 |
| 1 | CH2 | TerminalBlock_bornier-3_P5.08mm | J2 |
| 1 | ANTENNA | TerminalBlock_bornier-2_P5.08mm | ANTENNA1 |
| 2 | Conn_Coaxial | SMA_Amphenol_901-144_Vertical | RX1, TX1 |
| 1 | 1N4148 | D_DO-35_SOD27_P2.54mm_Vertical_KathodeUp | D1 |
| 1 | 1N4148 | D_DO-35_SOD27_P2.54mm_Vertical_AnodeUp | D2 |
Extender design files
The KiCad project lives in the kholia/Simple-TR-Switch repository on GitHub; these links point at the commit this page was built from.
Extender: common questions
How big is the Extender PCB?
The Extender measures 31.3 × 44.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Extender?
7 components, from 6 distinct parts. The full bill of materials is listed on this page.
Where can I download the Extender design files?
From the kholia/Simple-TR-Switch repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Extender design in my own project?
The repository has no license, so all rights stay with kholia. Use it as a reference, and ask the author before reusing the design.
More boards in Simple-TR-Switch
Similar boards
Hat
pa3gsb
65 × 56 mm81 parts2LNo license675
Radioberry preamp
65 × 56 mm137 parts2LNo license675
Radioberry juice
65 × 56 mm87 parts2LNo license675
Goodwatch20
travisgoodspeed
25.6 × 27.6 mm20 parts2LNo license568
GoodPocketWatch
75.2 × 101.2 mm56 parts2LNo license568
Goodwatch31
25.6 × 27.6 mm23 parts2LNo license568