roWaves Technologies

Certified Company ISO 9001-2008

RFT18-20 | EFHW Matching Transformer | 20W

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 behaviour and efficiency, > 85…90% (@3.6MHz). Enclosure design copyright Luis – CT2FZI. Technical description file available below at “Downloads”.

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 tarsnformation 1:49 (autotransformer, 3 + 21 turns, turns ratio 1:7)
Compensation capacitor: 100pF Silver Mica, 300Vdc 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
Dimmensions: 8.8cm x 2.6cm x 2.6 cm
Price :

88,50 lei (excl. VAT)

3 în stoc

(*Ships in 1-2 business days. VAT amount and the exact shipping cost will be calculated during checkout.)

Technical description file:

Informații suplimentare

Greutate 130 g
Dimensiuni 6,1 × 3,55 × 1,27 cm


Nu există recenzii până acum.

Fii primul care adaugi o recenzie la „RFT18-20 | EFHW Matching Transformer | 20W”

We use cookies to give you the best online experience on this website, by agreeing to accept their use here, in accordance with our policy.

Privacy Settings

When you visit any website, this can store or retain information in your browser, normally used as cookies. You may limit or control these personal cookie services here.

    Coșul tău
    Coșul tău este gol
      Te rugăm să alegi pe unul dintre colegii noștri pentru a începe o conversație sau trimite-ne un email la De asemenea, poți folosi formularul de contact de pe pagina "Contact". Suntem disponibili doar de Luni până Vineri, în intervalul 9-17h. Mulțumim!