Technical topics for ATV repeater builders
This is a collection of articles designed specifically with the ATV repeater builder in mind.
File:SL30 lock detect.pdf - How to obtain a lock indication from the Comag SL30 receiver.
Repeater aerials are difficult as they need to be horizontal omni!
G8GTZ built the VHF comms Big wheel or clover leaf design made out of 8mm copper brake pipe for GB3HV
Other designs available are:
And you can buy one, which is what the ZZ team did
ID Elektronik GMBH make some amazing filters and duplexers for 23cms and above - you can't build them for the price.