Difference between revisions of "Technical topics for ATV repeater builders"
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=== Logic === | === Logic === | ||
| + | The BATC Repeater Controller was initially designed for use by GB3HV, but can be adapted for use in any repeater system where digital end to end video and audio switching controlled by a Raspberry Pi is required. '''See''' [[Repeater Controller]] | ||
| − | + | === Antennas === | |
Repeater aerials are difficult as they need to be horizontal omni! | Repeater aerials are difficult as they need to be horizontal omni! | ||
===70cms=== | ===70cms=== | ||
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G8GTZ built the VHF comms Big wheel or clover leaf design made out of 8mm copper brake pipe for GB3HV | G8GTZ built the VHF comms Big wheel or clover leaf design made out of 8mm copper brake pipe for GB3HV | ||
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[[File:IMG_0686.JPG|400px]] | [[File:IMG_0686.JPG|400px]] | ||
| − | + | Other designs available are: | |
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| + | https://do7psl.de/portfolio-item/big-wheel-vhf-and-uhf/ | ||
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| + | https://vk6ysf.com/435mhz_5_petal_cloverleaf_antenna.htm | ||
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| + | And you can buy one, which is what the ZZ team did | ||
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| + | [[File:IMG_0619.JPG|400px]] | ||
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| + | == Filters == | ||
[http://www.id-elektronik.de/en/produkte/filter/index.htm ID Elektronik GMBH] make some amazing filters and duplexers for 23cms and above - you can't build them for the price. | [http://www.id-elektronik.de/en/produkte/filter/index.htm ID Elektronik GMBH] make some amazing filters and duplexers for 23cms and above - you can't build them for the price. | ||
Latest revision as of 23:28, 11 October 2023
This is a collection of articles designed specifically with the ATV repeater builder in mind.
Receivers
File:SL30 lock detect.pdf - How to obtain a lock indication from the Comag SL30 receiver.
Transmitters
Logic
The BATC Repeater Controller was initially designed for use by GB3HV, but can be adapted for use in any repeater system where digital end to end video and audio switching controlled by a Raspberry Pi is required. See Repeater Controller
Antennas
Repeater aerials are difficult as they need to be horizontal omni!
70cms
G8GTZ built the VHF comms Big wheel or clover leaf design made out of 8mm copper brake pipe for GB3HV
Other designs available are:
https://do7psl.de/portfolio-item/big-wheel-vhf-and-uhf/
https://vk6ysf.com/435mhz_5_petal_cloverleaf_antenna.htm
And you can buy one, which is what the ZZ team did
Filters
ID Elektronik GMBH make some amazing filters and duplexers for 23cms and above - you can't build them for the price.