Last part of the Helical Pass Band Filter. Includes testing with a Nanovna and costs involved in construction. SWR test in the garage workshop.

Links to other youtubers and full info.
http://www.qsl.net/z33t

   • 145 MHz Low Loss Bandpass Helical Fil...  

   • 2m band pass filter  

   • EA1RX 144MHz BAND PASS FILTER  

   • 145 MHz Low Loss Bandpass Helical Fil...  

Lastly

https://www.buymeacoffee.com/makedoan...