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

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...

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...

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...

See remarks on post "Guanella balun 1 core versus 2 separated cores". Return loss measurement: Left: FT 240-43 ...

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

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...

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

Empty left part of the engine. Start in a clean environment and be sure that all rests of old gaskets are removed. Place the bearings,...

Step 1: Use te 9 spokes needed for the inner side. Step 2: Inner side ==> spokes inserted from above. Step 3: Place the inner spokes into...

Every impedance can be matched with the use of two components. Capacitor or inductor. Dependent of the place you are on the smith...

I have made a vertical antenna with a lengt of 10 meters and two radials of 10 meters also connected to the ground. This antenna...

How to measure antenna impedance? Different types of VNA can be used. When using a professional VNA (Agilent, R/S,…) the measuring cable...