STL link systems

[trev]

Where can I get a reasonable STL? Couldn't I just use a low power FM "bug" to link to the site if it's less than a mile away? Would stereo be possible? I've been experimenting with a wireless microphone system with about 2mW o/p over a distance of about a kilometre(line of sight) but it doesn't work and even at close range(10 metres)there's an annoying hiss on the audio? Are there cheap ones available in the 160-420 or 860MHz ranges available?

[16.db]

NRG kits have 500Mhz link systems the stl systems 800mhz would cost about £4000 while the nrg kits
cost about 600 what about the mircowave link systems on broadcastwarehouse 5 miles line of sight dont know much about them though.

[trev]

Emm...okay. Is there anything a bit cheaper...in kit form, perhaps??

[Nick]

This is interesting. I'm looking at these sorts of things my self at the moment. I've heard of a station using the 400MHz cordless headphones as a link system, by dismantling them and making a few adjustments - ie. remove the crappy stereo coder, and put a decent one in at the TX end, and do away with the stereo decoder at the RX (headphones) end, then make adjustments for suitable level output, and connect the output from the headphone receiver to your TX. I've heard this works over 2 Miles - Not bad for £50 and a little modification.

The removal of the stereo decoder means you have a Multiplex throughput to the transmitter, and you could probably attatch an RDS encoder in line after the stereo coder at the TX end too...

[Mike]

NRG Kits also do Band 1 and 3 systems which are cheaper than UHF

[Mike]

Mind you Id never use a single element dipole for recieving a link (multipath)

[trev]

Nick do you mean those 863 MHz cordless headphones?? I've also been looking at those, but what is the output power of these? It says on the box that theres 100m range which won't quite do it, and infra red ones are even less. Where did you see the 400MHz set?

[16.db]

They only broadcast in mW tiny transmitters they could never get
that far some of the radio mikes might . NRG seem to be the cheapest don't know much about the broadcastwarehouse micro
wave system does any one have one .

[Mike]

If you linked on 863MHz id imagine a lot of anyry owners of cordless headphones would be ringing up the ODTR !
Also 173MHz (the radiomic band) could upset a lot of Churches and bingo halls