Hits
Baluns 1.8 - 30 50 MHz
Building a Balun is a relatively simple job. The transformer uses two ferrite tubes, material 43 or 61, or other material with permeability 125 to 850
post 16 May 2024
Toroid & balun Links →
Het Balun project
254/5000 Especially if you are a QRP member, the loss or return of a balun is important. You always want to make a connection with the lowest possible transmission power. It is a shame if the balun converts a large part of the supplied power into heat!
Magnetic longwire baluns 1:9
This Magnetic Longwire Balun MLB makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires
Materials for inductors ferrite, iron-powder for HF
The simple 1: 1 balun is being know in a variety of constructions. A dedicated chapter seems appropriate
Broadband common mode choke balun
A 1:1 balun or RF line isolator for remove RFI
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254/5000 Especially if you are a QRP member, the loss or return of a balun is important. You always want to make a connection with the lowest possible transmission power. It is a shame if the balun converts a large part of the supplied power into heat!
This Magnetic Longwire Balun MLB makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires
The simple 1: 1 balun is being know in a variety of constructions. A dedicated chapter seems appropriate
A 1:1 balun or RF line isolator for remove RFI
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
30 Volt Computer Power Supply Stack A bonus was that i discovered that these did not need a standby load connected to the supply to keep them running just apply mains power and close the Start lead to ground