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QRP EFHW (unun with Winder 2643625002)
IP Report
Print Profile(2)
0.16mm layer, 3 walls, 15% infill
Designer
2.8 h
2 plates
1.5uH Coil (V2)
Designer
47 min
1 plate
Open in Bambu Studio
Boost
14
31
2
1
19
9
Released
Description
- With winder integrated, the total weight is about 200g when using 20AWG wires, it can easily fit your pocket.
- The ferrite 2643625002, according to MM0OPX's test, can reach almost 90% efficiency from 1.8Mhz to 28Mhz
- With compensation coil you can bring down the resonate point of 15m/10m band to commonly used frequencies.
For assembly guide, visit my blog: https://blog.edward-p.xyz/hamradio/2025/06/assembly/
Sorry for Chinese only, but mostly pictures, should be fine :）
Have fun, and 73!
Documentation (1)
Other Files (1)
BOM.zip
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