Feeder and losses

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Ant
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Feeder and losses

Post by Ant »

So, worst case scenario, UHF, so 430MHz band, what are your acceptable losses?

It's getting expensive trying to spec my losses under 1db. I've considered putting a colinear on the roof and running some cable down to where I'll be operating, I could be looking at about 15m. I've gotten hold of some decent cable with a loss spec of 0.089db/m, giving me a loss off 1.335db which I think is too much to lose.

What do you think? What kind of set up to you have?
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ch25
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Re: Feeder and losses

Post by ch25 »

6dB is 1s unit
You can't have too many antennas...
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Andy
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Re: Feeder and losses

Post by Andy »

1.3 dB is about as good as you'll get with sensible coax. It's nothing really.
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Ant
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Re: Feeder and losses

Post by Ant »

Yeah, anything less than 1.3db for the 15m run and we're starting to look at over £5 per metre for coax.
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Andy
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Re: Feeder and losses

Post by Andy »

Anything with losses less than that will be expensive, thick, heavy and a bugger to install. You'll have to buy special connectors too. 75 ohm satellite coax is lighter and will give lower loss per metre (it's ideal for scanning), but you'll probably want to stick to 50 ohm if you are transmitting.
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