RFT18-20 64:1Bal-Un 20W

This product is currently out of stock. At the moment, we have no plans for re-stocking it. Please send us and email of you are interested about it. Based on your interest, we might re0-build a new lot. Thank you!

This is a high efficiency matching transformer, ultraportable, for SOTA or other outdoor activities and not only. Based on a FaiRite larger size ferrite bead instead of a toroidal core ( NOT the FT82-43 or similar!) it has excellent thermal behavior and efficiency, > 85…90% (@3.6MHz). Enclosure design copyright Luis – CT2FZI. Technical description file available below in the Downloads Tab.

Main Features:

• enclosure color: grey or black
• manufacturer code: ROW-RFT18-20
• ordering code: RFT18-20
• applications: for 1/2 wire (EFHW antennas, QRP, SOTA, portable etc.)
• fast deployment antenna wire length: ~ 9.35m (30.5ft) for 20m band (EU QRP region, 14.285KHz), min. 5..7m above ground
• antena wire length: ~40m for 80-10m operation, use min. 20m of wire for decent results
• transformation ratio: impedance transformation 64:1 (autotransformer, 3 + 24 turns, turns ratio 1:8)
• compensation capacitor: 100pF MLCC 100V capacitor, 100Vdc inside
• power handling: 20W and more (120s @ CW – core temp. is 25°C, on dummy load)
• ferrite Bead Material: 43
• frequency range: 3- 30MHz
• transformer Efficiency: > 85…90% @ 3.6MHz
• RF max. power depends on application: 20W CW
• VSWR: < 2 with 3200Ω load (please see Datasheet below)
• weight: 35g
• dimensions: 8.8cm x 2.6cm x 2.6 cm