웹2024년 8월 12일 · Consider the construction of a typical bead balun, enclosed in PVC and heat shrink tubing. As little as 20 watts dissipated out of 1500 watts can produce damaging heat in tiny beads enclosed in a PVC tube. 20 watts out of 1500 is less than 0.1dB loss, yet it overheats the core! The problem is almost always a heating problem, and not a core-loss ... http://hl1lua.com/category/balun

Recommended 9:1 unun core type(s) - Amateur Radio Stack …

웹This unun should be used with the wire lengths listed in the table shown in the above link. Use of the 9135 for "random ... There is no comparison. The Balun Designs 9:1 absolutely blows away the U****ax matching unit. Lower SWR across the bands, no saturation, and the core stays stable. I have ordered a 9135 but will keep the U****ax ... 웹2024년 9월 3일 · In constructing his balun, he used a prototype with a variable capacitor to find the value with lowest SWR for his application, which implies a matching function. The capacitor in the photo is to help the unit work better on the higher HF bands, can we leave it there as things will get rather technical. john wall parents

Ununs - Balun Designs

웹This unun should be used with the wire lengths listed in the table shown in the above link. Use of the 9135 for "random ... There is no comparison. The Balun Designs 9:1 absolutely … 웹2024년 2월 27일 · When we say a Balun or UNUN is a 4 to 1 device it will work just as well backwards. A 4 to1 balun can also match 50 Ohm to 12 Ohms, and a 9 to 1 can match 50 … 웹100 ohms unbalanced to 50 Ohms unbalanced Unlike Baluns, Unun's (unbalanced to unbalanced) provide impedance transformation for antennas that are naturally unbalanced … john wallpe attorney