Baluns are often overlooked in OTA systems, when in fact it is a very important part.
As the transducer to convert 300 -> 75 ohms, the most efficient is preferred results in less signal loss.
Here is a summary of the baluns I have tested.
1. Channel Master Model 0089 - Manufactured in Taiwan ROC 08-0068 -> The best balun ever made!
2. Channel Master Model 0089 - Manufactured in China (Red Boxes)
3. Channel Master Model 94444 - Manufactured in China (Plastic Bags) Shipped Channel Master 4251 and 4228 ~ 15 years ago
By far, the Channel Master Taiwan are the best baluns if you can find them. The box will indicate the origin, or simply look at the balun.
I have changed and swapped baluns and you can tell the difference. In several tests the picture would not even decode with a recently purchased over the counter cheap balun when compared to the above listed baluns.