Maandag 10/04 Deze morgen startte ik mijn tocht om 9u30 aan de Lourdesgrot in Nieuwmunster. Daar werden de kaars en symbolen van de...

Startdatum komt naderbij.

Picture: Upper core = FT240-43 1:1 curent balun Lower core = FT240-43 1:4 Guanella current balun Wires are wound in a different way! Take...

Be careful when removing the core as it is very fragile! 10 windings were made both top and bottom. They behave like 100 ohm transmission...

Swinging Arm, Long, Right - BMW-Motorrad BMW partnumber: 46637686678 Swinging Arm, Long, Left - BMW-Motorrad BMW partnumber: 46637686677...

Height and width of the loop are 1 meter. This means that one turn = 2.80 meters. In this case i have used tree turns = 8.40 meters. New...

Height and width of the loop are 1 meter. This means that one turn = 2.80 meters. In this case i have used two turns = 5.60 meters. I...

The feedpoint Square with a side = 5 meters Hard to see on the picture. top left is the feedpoint Used material: 1 core of 73 material...

Start situation: Step 1: remove the small fairing panels. Step 2: remove the large fairing panels. Step 3: remove the brake...

Pictures: Schematic: U out = 2.5 x U in ==> Impedance Out = 2.5 x 2.5 = 6.25 x impedance In @ 50 Ohms in, Out = 312 Ohms. Measuring...

Picture: Schematic: Input: 3 transmission lines with an impedance of 150 ohms in parallel = 50 Ohms, Output: 3 transmission lines with an...

Used material: - 3 cores Amidon 240-43 - copper wire 1.8 mm diameter - PTFE tube with 2 mm internal diameter and 3 mm outside diameter -...

Used material: FT240-43 Schematic: Insertion loss: Return loss: Common mode rejection:

Guanella 2 wire Ruthroff 3 wire Schematic: Guanella 2 wire Ruthroff 3 wire Return loss: Guanella 2 wire Ruthroff 3 wire...

Used material: AmidonFT240-43 core. Top view Bottom view This is the way I think it should be made. Schematic: Insertion...

Used material: Amidon FT240-43 cores. LEFT = 2 conductors RIGHT = 4 conductors Left: transmission line with an impedance of 100 ohms....

For building descriptions, see my previous blogs. Return loss measurements: Insertion loss measurements: Insetion loss @ 14 MHz = 0.2 dB...

Insertion loss: Return loss: Common mode rejection:

On both sides, i placed 10 turns teflon wire. Insertion loss: Worst case = 0.09 dB @ 30 MHz. This means a power loss of 2 %. Return loss:...

The TS440 power amplifier is a push-pull amplifier with a very low output impedance. To make a conversion to 50 ohms, a 1/16 impedance...