Protect Your Transmitter Site Phone Line? RW rip.

[ThaDood]

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

[~SIGINT~]

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

[RobRich]

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

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