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Do you enjoy making your own equipment or antennas? Discuss construction and design in here.
2 posts • Page 1 of 1
- New User
- Posts: 3
- Joined: 31 Jul 2018, 12:24
Has anyone tried linking 2 cheap radios speaker to mic with tx rx offset to make a repeater? I wonder how much extra ground could get out of it. I spend a lot of time in the welsh hills might be interesting to try
- Radio Addict
- Posts: 724
- Joined: 10 Jun 2007, 22:41
- Call Sign: G4RMT
- Location: North East Suffolk
In fact - many smaller commercial repeaters are actually two hand=held radios inside - connections just tagged to the circuit board, covered in sealer. They usually have a small pcb that manages the difference between audio levels, and use the receive indicator - maybe an LED, or a display element, to switch it into transmit. Those crossband adaptors do similar things, but usually use a Vox circuit to put it into transmit that can behave a little unpredictably. Performance wise - the main problem is desensitisation - the transmit frequency making the receiver a bit deaf - but the wider the spacing the better. If you put one of these on top of the mountain - the range can be quite impressive.
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