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GaryWilson
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Coax types .. Empty
PostSubject: Coax types ..   Coax types .. Icon_minitimeThu May 12, 2022 2:51 pm

is the coax still the same from years gone by or are there new fancy types out now ? 
i will be using about 60 to 70 foot of coax do i need something special or just go with normal coax ? 
will be using crt ss 6900 v7 ...
thanks guys ...
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Alan Pilot
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Call Sign : 163-CT-220...MW7TTA
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Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7300,,Anytone AT-D878UV PLUS",,LINCOLN II+.

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PostSubject: Re: Coax types ..   Coax types .. Icon_minitimeThu May 12, 2022 5:14 pm

A lot use rg8x.
A step up from the cheep stuff but not expensive at all but i think it is good enough and use it on all 4 of my aerials.

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PostSubject: Re: Coax types ..   Coax types .. Icon_minitimeThu May 12, 2022 6:23 pm

My choice for home is RG213, for portable RG58.

Have a play with this, might help you decide regarding losses:
https://www.qsl.net/co8tw/Coax_Calculator.htm

Some of the very top end stuff is very pricey though and some need special connectors which add even more cost.

Some people use 75ohm TV coax to good effect too btw.

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PostSubject: Re: Coax types ..   Coax types .. Icon_minitimeThu May 12, 2022 6:45 pm

SangueG wrote:
My choice for home is RG213, for portable RG58.

Have a play with this, might help you decide regarding losses:


Some of the very top end stuff is very pricey though and some need special connectors which add even more cost.

Some people use 75ohm TV coax to good effect too btw.
rg 213 BX or UBX ?
it does say it's a lot better when you use the calculator ....
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PostSubject: Re: Coax types ..   Coax types .. Icon_minitimeThu May 12, 2022 7:37 pm

I use RG58 for HF it's always been good enough for me.

73's Gary.

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QTH or Location : Shrewsbury IO82OQ
Equipment Used : PC-ALE/JS8Call: Yaesu FT-847 + HF > SGC SG-235 + 1.81MHz Horizontal Dipole, 6m/2m/70cm > 6m via 4m/6m Diplexer + via 6m/2m/70cm Triplexer > Diamond V-2000 with EAV2000 Radial Kit, 4m > via 4m/6m Diplexer + DPW-X4 Vertical Dipole, 2m/70cm > via 6m/2m/70cm Triplexer > Diamond V-2000 + EAV2000. 40m Pactor: Yaesu FT-77 + 2x Watson HF40 Mobile Whips Horizontal Dipole, 2m Packet: Icom IC-F110 2m + unknown 2m/70cm Co-linear. 2m SSB Voice Nets Yaesu FT-480R + DPW-X2 Vertical Dipole, 2m/70cms FM Simplex: Yaesu FT-90R + Diamond X30 Co-Linear. CB: Albrecht AE5890 EU + Sigma 5/8 Silver Rod, Planned Equipment: 70 cm Repeaters: Icom IC-F210 + DPW-X70 Vertical Dipole. HF + 6m DX: Yaesu FT-991A + Butternut HF-9V + TBR-160 + 20 10m radials
Age : 57

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PostSubject: Re: Coax types ..   Coax types .. Icon_minitimeFri May 13, 2022 8:15 am

With RG58 or RG8X you use smaller screw-on PL-259's, which you're probably used to from the past, with the larger diameter coax, you'll need PL-259s to match, most are compression type, which are normally a better fit, although more complicated to fit, plus don't forget you need to solder the centre and wrap after you've fitted to your antenna with self amalgamating tape to water proof

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PostSubject: Re: Coax types ..   Coax types .. Icon_minitimeFri May 13, 2022 9:58 am

There's always "new fancy" something with plenty of 'salesmen' to push it!

Use whatever you've got, can get, begged, borrowed or .... OK, not stolen. Wink

You'll never notice the real world apparent differences in most of the stuff anyway as the numbers are pretty small. I've used everything from RG6 TV stuff to RG11 satellite/video feed, (your rig will never notice the 75 ohm and your SWR meter might show a 1.5:1 reading), to good old RG58 which is cheap as chips and available from almost anywhere.

The best stuff I've used was good quality RG11 that some cable installer gave me a 'scrap/partial' reel of from his van. Must've been 60-70 feet worth on there! Very Happy

OK, I might not run 60 foot worth of RG174 but I wouldn't bat an eye with shorter runs.


Tim, G5TM, did a good video recently about coax that might be worth a watch :-

https://www.youtube.com/watch?v=Q1772xTn7BM

(About 9 mins in he covers CB aspects but worth watching all of it.)



When it comes to it in the end just buy what you can afford or justify spending on and are happy with.

The most important thing is to get on air. Coax types .. 1f44d

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PostSubject: Re: Coax types ..   Coax types .. Icon_minitimeFri May 13, 2022 12:09 pm

Agree, especially in the financial climate we live in today any savings made on equipment etc makes a difference, I would say so long as your not damaging your gear in any way anything goes. I like antenna construction, experimenting with different materials especially on dipoles, I don't think I've ever bought anything, always found the stuff or reused it. Certainly gets the old brain matter ticking over.

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Wireless
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Call Sign : 26-CT-4345 / M5WJF
Posts : 288
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Join date : 2021-11-19
QTH or Location : Shrewsbury IO82OQ
Equipment Used : PC-ALE/JS8Call: Yaesu FT-847 + HF > SGC SG-235 + 1.81MHz Horizontal Dipole, 6m/2m/70cm > 6m via 4m/6m Diplexer + via 6m/2m/70cm Triplexer > Diamond V-2000 with EAV2000 Radial Kit, 4m > via 4m/6m Diplexer + DPW-X4 Vertical Dipole, 2m/70cm > via 6m/2m/70cm Triplexer > Diamond V-2000 + EAV2000. 40m Pactor: Yaesu FT-77 + 2x Watson HF40 Mobile Whips Horizontal Dipole, 2m Packet: Icom IC-F110 2m + unknown 2m/70cm Co-linear. 2m SSB Voice Nets Yaesu FT-480R + DPW-X2 Vertical Dipole, 2m/70cms FM Simplex: Yaesu FT-90R + Diamond X30 Co-Linear. CB: Albrecht AE5890 EU + Sigma 5/8 Silver Rod, Planned Equipment: 70 cm Repeaters: Icom IC-F210 + DPW-X70 Vertical Dipole. HF + 6m DX: Yaesu FT-991A + Butternut HF-9V + TBR-160 + 20 10m radials
Age : 57

Coax types .. Empty
PostSubject: Re: Coax types ..   Coax types .. Icon_minitimeFri May 13, 2022 8:38 pm

Victor wrote:
OK, I might not run 60 foot worth of RG174 but I wouldn't bat an eye with shorter runs.

When it comes to it in the end just buy what you can afford or justify spending on and are happy with.

Couldn't agree more, I do have a reel of RG174 for patch cables in the shack, easier to route, cheaper, and the loss is insignificant.  The only thing required is enough SO-239 to BNC adaptors, ha.

As it is, I have a lot of cut lengths of RG-213, and most of a reel of RG8x, so I tend to use up the 213 for permanent installations if I have a length the right size.

However, Portable suits RG8X, and mobile suits RG174, to insert in door jams, routing short lengths through a car/vehicle.

The above goes for any band, 160m to 70cms, however on long runs for UHF, SHF frequencies, using much thicker coax is more important, IF you are looking at maximum performance, particularly as the Output Power of stuff above 70cms is tens of Watts or less, some TX are as low as 1mW.  In RX in the GHz ranges, most receivers are pretty deaf, and rely on 30dB gain on an LNB, or the use of pre-amps.  Also in GHz ranges, filtering for spurious signals before amplification is quite important to reduce noise.

(You can tell I attended a BATC Lecture at SARS on QO100 Satellite Repeater Operations on Thursday, some must have stuck in my old feeble brain).

Horses for courses.

The other nonsense is the specified length of Coax for 11m, unless your antenna causes the coax to radiate RF as a part of its design, then length of coax is relatively unimportant on 11m.  To adjust SWR, adjust the antenna, not the coax.

Also, don't buy any of this...

Coax types .. Downlo10

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Call Sign : 26CT4113/G1HWY
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QTH or Location : West Sussex
Equipment Used : CRT SS9900, President Bill....ICOM, 705, 7100, 7300, 9700, Kuhne QO-100 up and down converters, Elecraft K2. Antennas EA Cobweb, Hustler 6BTV
Age : 67

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PostSubject: Re: Coax types ..   Coax types .. Icon_minitimeSun May 15, 2022 6:25 am

Messi and Paoloni nut here, not cheap but very low loss and very flexible.

On VHF and above I used to use Westflex 103 but it don't bend well
where as M&P Ultraflex 13 easily goes round a rotor.
Have 30metres from shack up to the Create Logperiodic at 10metres.

On the two HF ants I use Ultraflex 10, might as well have no real loss. Very Happy

All my patch leads from my entry panel are Ultraflex 7, tad bigger than RG58
but super flexible for what it is.

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