Re: coax question

NikTheGeek wrote:
Hi, just trying to get back in to AR after quite a gap (kids). I have a 10m multimode to try and I've dug out a Cushcraft AR10 10m "ringo" from the garage. But I have a feeder question:

I used to have the back bedroom as a shack, now it'll have to be the front downstairs room. This means I have to feed the ringo up over the roof, down the side of the house and in to the front room. I *have* to use RG58 (size) coax to get in through an existing old TV coax hole and to run under the carpet to get to the radio. However, should I use RG58 (size) the whole run, or join it outside to RG213u for the rest of the run. It would be a 30m run, so approx 10m of RG58 and 20m of RG213.

Or, should I just use the best spec RG58 I can get for the whole run. Or Mini 8 which is close enough in size.

In other words, would the loss of the join and the mismatch of having 2 different sizes of coax outweigh the advantage of the lower loss?

You get the idea. Simple question, but I suspect a less than simple answer! :)


Nik,

The difference in loss between 30M or RG58 compared to 20M RG213/10M RG58 at 28MHz is around 1dB. How much you value every dB only you can decide :)



--
.

Relevant Pages

  • coax question
    ... But I have a feeder question: ... I *have* to use RG58 coax to get in through an existing old TV coax hole and to run under the carpet to get to the radio. ... would the loss of the join and the mismatch of having 2 different sizes of coax outweigh the advantage of the lower loss? ...
    (uk.radio.amateur)
  • Re: Any German speakers here?
    ... Rene has translated it already. ... Depending on where it has been the innards may or may not be that fresh. ... In the past I have seen some coax that had been used outdoors and had gotten a good soaking. ... If you need 50ohm coax why not go to the next ham shop and buy a length of new RG58? ...
    (sci.electronics.design)