## Insertion loss measurements.

FT240-31 ===> FT240-31 FT240-31 ===> FT240-43 FT240-31 ===> FT240-61 FT240-31 ===> FT240-77 FT240-31 ===> FT240-31 FT240-31 ===>...

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xtgaby

- Oct 26, 2020
- 1 min

FT240-31 ===> FT240-31 FT240-31 ===> FT240-43 FT240-31 ===> FT240-61 FT240-31 ===> FT240-77 FT240-31 ===> FT240-31 FT240-31 ===>...

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xtgaby

- Oct 24, 2020
- 1 min

FT240-31, FT240-43, FT240-61 and FT240-77 Used material: FT240-31 Start version Tuned version for best SWR (move the coils for best...

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xtgaby

- Oct 21, 2020
- 1 min

Go to Building and measuring baluns (Part I) and see the results of the guanella 1:4 balun now with teflon insulated wire. FT240-31 with...

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xtgaby

- Oct 18, 2020
- 1 min

I placed an adjustable capacitor between the two cores, and adjusted de capacitor for minimum SWR.

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xtgaby

- Oct 15, 2020
- 1 min

FT240-43 FT240-31 FT240-31 FT240-43 FT240-31 FT240-43 FT240-31 FT240-43

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xtgaby

- Oct 14, 2020
- 1 min

I have used an adjustable capacitor with a value between about 5 and 60 pF. Now you can change the capacity until you have the best...

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xtgaby

- Oct 13, 2020
- 1 min

Use this balun allways in combination with an 1:1 current balun! Schematic diagram: Used material: FT 240-43 Amidon Primary (left): 2...

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xtgaby

- Sep 28, 2020
- 1 min

5 turns input 7 turns output Used material: 1 core of 73 material Fair-Rite 2873000202 Input = 5 turns / Output = 7 turns 5...

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xtgaby

- Sep 24, 2020
- 1 min

4 turns input 5 turns output Used material: 1 core of 73 material Fair-Rite 2873000202 Input = 4 turns / Output = 5 turns 4 square...

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xtgaby

- Sep 17, 2020
- 1 min

Picture Schematics primary 2 turns secondary 6 turns Used material: 3 cores of 73 material Fair-Rite 2873000202 Input = 2 turns ...

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xtgaby

- Sep 3, 2020
- 1 min

Picture Schematics Number of turns left = number of turns right. L value: XL value @ 1 MHz 1 turn: 0,02 mH 125 Ohms...

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xtgaby

- Jul 29, 2020
- 1 min

Used material: 73 material Fair-Rite 2873000202 How to build and measure. 1) One core 2 turns left and 3 turns right. Input = 2 turns / ...

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xtgaby

- Jun 1, 2020
- 2 min

Remark: all return loss measurements (SWR) are with a light inductive load (adjustable resistor). Real results are always better then...

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xtgaby

- May 31, 2020
- 1 min

Calculated coil value of the loop is 6.4 uH as explained in de 40 meter band loop. Target frequency = 1.858 KHz Calculated capacity...

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xtgaby

- May 30, 2020
- 1 min

Calculated coil value of the loop is 6.4 uH as explained in de 40 meter band loop. Target frequency = 3.700 KHz Calculated value for the...

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xtgaby

- May 27, 2020
- 1 min

Alu tube 22 mm diameter lengt = 6 meter ==> diameter loop = 2 meter. Small loop to insert the signal =1.30 meter for best SWR figures. At...

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xtgaby

- Mar 28, 2020
- 1 min

Return loss measurement: Left: FT 240-43 Right: FT140-43 Insertion loss measurement: The...

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xtgaby

- Mar 15, 2020
- 1 min

For people who are not used to work in dB. Loss compared to input signal. VSWR compared to Return Loss (dB

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xtgaby

- Feb 23, 2020
- 1 min

If you have a transmission line (coax or open line) with an unknown impedance, I will explain here how to measure this. Above: far end of...

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xtgaby

- Feb 9, 2020
- 2 min

The 1: 4 Guanella current Balun with FT240 - 31 core. Material used: FT240-31 (outer diameter is 2.4 inch material = 31) Just Google...

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