Antenna Insulators for LF-MF

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Antenna Insulators for LF-MF

Antenna Insulators for LF-MF

Calculations indicated that there was close to 35,000 volts present on the antenna during high power operation

post 16 Apr 2025

Antenna 136KHz Links →

70

LF station info
Transmitter 400W from 2xIRFP250 with LF DDS VFO, Receiver Icom IC-761 with 2x500Hz and 2x250Hz CW filters, TX antenna 135m long wire

Longwave equipment
Old Longwave equipment for 136kHz

Longwave my 136 kHz station
Primary 3.4 mH loading coild 1/3 way up the antenna,this coil improved my ERP signal about 4-5 dB

Longwave Station
The 136kHz signal is filtered by a very narrow 2-stage FET preselector using Q-multiplication feedback to increase the Q factor, its bandwidth is less than 200Hz

LF-Station

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