HFU HF Underground

Technical Topics => The RF Workbench => Topic started by: ThaDood on July 16, 2023, 1823 UTC

Title: Protect Your Transmitter Site Phone Line? RW rip.
Post by: ThaDood on July 16, 2023, 1823 UTC

FWR'ed from Boomer. Not only could this protect landline phones from getting ZZZZZZZZZZZZZZAPPED at tower site locations, but could help take out RFI from close AM TX sites, or if you have a Carrier-Current station on-site. I wouldn't use this for Ethernet connections, unless you want a really slow BIT Rate.
https://www.radioworld.com/columns-and-views/protect-your-transmitter-site-phone-line

Title: Re: Protect Your Transmitter Site Phone Line? RW rip.
Post by: ~SIGINT~ on July 16, 2023, 2315 UTC

The Crown Amplifier Guide found at the link is a good resource.

Title: Re: Protect Your Transmitter Site Phone Line? RW rip.
Post by: RobRich on July 17, 2023, 0942 UTC

Additional notes on landline surge protection, including a few circuit diagrams:

https://www.epanorama.net/documents/surge/telesurge.html