Product Summary
EM-25 / EM-43 1.8-30MHz Shortwave Choke Coil Magnetic Ring Shortwave 1:1 Current Balun For is a RF wireless product selected for wireless communication, antenna experiments and radio signal workflows. It is suitable for radio users, SDR experimenters and wireless project builders who need practical electronics hardware for reliable project work.
Best For
- wireless communication, antenna experiments and radio signal workflows
- SDR receivers, LoRa modules, antennas and RF test setups
- Electronics testing, repair, prototyping and maker workflows
FAQ
Who is this product for? It is intended for radio users, SDR experimenters and wireless project builders.
What should I check before buying? Review the product options, specifications, included accessories and compatibility details on this page.
Industrial grade anti-interference performance
-Specially designed for 1.8-30MHz high-frequency radio stations
-Strongly suppress common mode current and eliminate electromagnetic interference (EMI) from equipment
-Ensure the purity of communication signals for field operations/competitions
materials, dual specification durable design
-High permeability imported ferrite magnetic ring (EM43/EM25 optional)
-High temperature and saturation resistance, high power without magnetic decay
-Comparison of heat dissipation:
▶ EM43 large magnetic ring (Ø 45mm): Increased heat dissipation area by 40%, supporting 150W PEP high power
▶ EM25 small magnetic ring (Ø 25mm): lightweight and portable, supports 100W PEP
Plug and Play · Full Scene Adaptation
-M-male (PL-259) to M-female (SO-239) interface
-Directly connect the radio station and feeder, and install quickly in 3 seconds
-Applicable scenarios:
Shortwave communication/antenna grounding optimization/RF testing/emergency communication/amateur radio competition
Technical Specifications:
◆ Model: EM43/EM25 dual specification
Frequency range: 1.8MHz-30MHz (full HF band coverage)
Magnetic ring size:
-EM43: Diameter 45mm
-EM25: Diameter 25mm
Interface type: M male head (PL-259) → M female seat (SO-239)
Core function: 1:1 current type balun, common mode current suppression
◆ Power capacity:
- EM43:150W PEP
- EM25:100W PEP
