Copper and Aluminum Ham Radio Bandpass Cylinders ????

[BOOTY MONSTER]

what are these things used for ?

Vintage Copper and Aluminum Ham Radio Bandpass Cylinders

 

[W5LZ]

They appear to be duplexers. Typically used on repeaters so the same antenna can be used on two frequencies at the same time, receiving and transmitting at the same time.
- 'Doc

 

[bob85]

they are tunable bandpass cavity filters for repeaters or wherever two radios are located in close proximity to each other physically and frequency wise.

 

[RickC.]

Yep, look like VHF duplexers to me.

Bolt a Monkey Made on top of one and be 10-8.


Rick