Article below is a part of the assembly process of the UHF duplexer – main article is HERE.
Drawing below shows a [AL100] – 8mm Top Cover.
Main purpose of the part is to protect everything what is in the chamber (coil for RX or capacitor) for TX – of course for a standard “minus” offset repeaters. Otherwise it will be reversed 🙂 .
![](https://www.rozenek.com/wp-content/uploads/2022/11/AL100-8mm-Aluminium-Top-Cover.png)
![](https://www.rozenek.com/wp-content/uploads/2022/10/AL100-8mm-Aluminium-Top-Cover-scaled.jpg)