My new TR-35 QRP CW transceiver does not have a build-in tuner nor a build-SWR meter. My search for a very small and simple metering solution led me to the work of Martin, DK3IT.
His complete work can be found on GITHUB for download. As suggested on his site, I've ordered three tiny PCBs via OSHPARK - unbelievable that you can three PCBs including shipment to DL for €2,22.
I've ordered all the parts (except BNC-plug ) from REICHELT according to the list on the GITHUB page.
Some pictures
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Seen from the outside in a small die cast case. The BNC-plug is from CONRAD PartNo 2589355 - 62 |
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| The mounted PCB from the transformer side |  |
| The PCB from the potentiometer sode |  |
| And the PCB in all its glory from the top. |  |
| As a part of my CQ QRP station |  |
Experience
The TinySWR is very sensitive. It show the slightest deviation from 1:1.
Next Steps
As a next step I have to "calibrate" the LED bar using my SWR-Simulator.