Guest Jon Posted November 5, 2015 Report Share Posted November 5, 2015 for a cheap, low power repeater, i am looking at 2 Tera TR-505 radios with a repeater box setup (sainsonic on amazon, using motrola plugs) the radios are $99 each, the box is $25. antenna upgrades are around $12 each for a nagoya 771 if you wanted them, roof or car mount would probably be more. i have one Tera just need to pony up and get the another one to have a functioning repeater Quote Link to comment Share on other sites More sharing options...
zap Posted November 6, 2015 Report Share Posted November 6, 2015 You need roughly 10 feet of vertical (or 30 feet of horizontal) separation to keep those things from desensing one another. jwilkers 1 Quote Link to comment Share on other sites More sharing options...
xShadowx Posted November 6, 2015 Report Share Posted November 6, 2015 You need roughly 10 feet of vertical (or 30 feet of horizontal) separation to keep those things from desensing one another.can you elaborate? I have seen several mobile repeater setups with 2 radios in hard plastic cases or metal ones with antennas mounted directly to the boxes, they seemed to be operating without issue from what I could see. would be using different input output frequencies. rould using a delayed repeater box resolve this issue vs using 2 radios? I was looking as doing something similar using 650 Quote Link to comment Share on other sites More sharing options...
Logan5 Posted November 6, 2015 Report Share Posted November 6, 2015 Low power is fine, but at 40 or 50 watts I would use a duplexer and use a single antenna. If not, be sure to set the antennas on different planes and separate them as much distance apart as possible. 20+ feet in combination could save your radios. Quote Link to comment Share on other sites More sharing options...
zap Posted November 7, 2015 Report Share Posted November 7, 2015 can you elaborate? I have seen several mobile repeater setups with 2 radios in hard plastic cases or metal ones with antennas mounted directly to the boxes, they seemed to be operating without issue from what I could see. would be using different input output frequencies. rould using a delayed repeater box resolve this issue vs using 2 radios? I was looking as doing something similar using 650The lower cost Chinese radios have notoriously wide band pass filters on the receiver. As a result, the suffer in the adjacent channel isolation. 40 dB versus the standard 65 dB. Even split there will be issues without running separation or a duplexer. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
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