RF cable type

[enemra]

Hello,

I am setting up a HAM antenna on my house terrace. The cable length is going to be around 25 meters from terrace to my transmitter, with max RF power required is 500W. Which RF cable should I choose for the lowest attenuation? Someone suggested me HLF600.

Frequencies - 145MHz and 433MHz

Thanks

[Bud]

You should be using 5" air dielectric solid copper pipes transmission lines that radio stations use. Does that help?

[fourfathom]

You should be using 5" air dielectric solid copper pipes transmission lines that radio stations use. Does that help?

The point being: there is a difference between "lowest" and "lowest practical" attenuation. 

About that HLF600 cable, I found a spec sheet that gives the attenuation at 450 MHz as 5.6 dB per 100 meters.  Your 25 meters would lose about 1.4 dB (plus a bit for connectors).  There may be better cables, but that's pretty good.  LMR-600 seems to be an equivalent cable, and this is often used.

[enemra]

Indeed, lowest practical and widely used

[Neomys Sapiens]

You might consider Ecoflex15 from SSB Elektronik or from Kabel Kusch in Dortmund. If you use it, order the specific connectors too.

[Solder_Junkie]

Check cables and connectors from Messi and Paoloni. Hyperflex 10 or 13 are really good.

Widely available from a number of amateur radio dealers and direct from M&P.

https://messi.it/en/home.htm

SJ

[pdenisowski]

I've used LMR400 for my weak signal VHF and UHF work and it's a good compromise between price, performance, and ease of use.  You can see pics of my weak signal arrays on my QRZ page (near the bottom)

https://www.qrz.com/db/KO4LZ

[enemra]

Thanks for the inputs friends... Helped a lot

[pienari]

I use most of my antennas RF400 for 1800MHz and 1/4" Belden coax 27 and 70MHz.
Old mast was a bit far of my house, 7/8" coax 45m.

All performs well.

[A.Z.]

Hello,

I am setting up a HAM antenna on my house terrace. The cable length is going to be around 25 meters from terrace to my transmitter, with max RF power required is 500W. Which RF cable should I choose for the lowest attenuation? Someone suggested me HLF600.

Frequencies - 145MHz and 433MHz

Thanks

here

https://messi.it/en/home.htm

their factory is "in my backyard" and aside that never had issues with their cables, but be sure to lay them out and connect them the RIGHT way

[MathWizard]

You should be using 5" air dielectric solid copper pipes transmission lines that radio stations use. Does that help?

Do people ever use common 1/4", 1/2" copper pipes for anything hobby RF/etc related? It all must cost a fortune these days.

[coppercone2]

I have a feeling that the pipes suck dimensionally for RF uses where you wanna use an air line

I never saw it used in a coaxial structure. I wanted to do experiments with ducts and such but its kinda out there

but I think if you suspend a 3/8 inch tube inside of a 3/4 inch tube you get something like 45 ohm coaxial line.

oh or a 2 inch with a 3/4 inch in it. that is 49 ohms if you go by ID/OD

that might make a sample holder. idk what you would sample or how it would be built exactly but yeah

[geggi1]

If it is lenghts under 10m you will have negnectable losses on these frequencies.
At 2m you will be under 1dB loss and at 70cm you will be at approxomately 1,5db loss.
This can be compensated by using a antenna with 3db more gain.

[radiolistener]

If you're using kiloWatt power at 433 MHz, may be there is a sense to look for waveguides. They have less loss.

[kj7e]

LMR600 would work well, but 7/8 heliax would work better and would be my choice, if the feed-line would remain static once placed.