Triax cable anyone???

[rasputen246]

I have an almost unlimited (don't ask :shock: ) supply of new 75 ohm Belden teflon coated Triax RJ/59 cables in several lengths.
I have/can get new 3Meters, 10m,30m,60m,100m triax all day long.

Any one ever used this or know if I could use it to my advantage for RX only antena feed line??????

The cables come with coax BNC connectors, but I would be willing to (gasp!) BUY triax connectors if I find out this stuff might work out.

Opinions???

Yes I realize it is 75ohm, and that's why I blew it off so far, but some opine it dosen't matter that much on relative short RX only feeders.
I'M NOT REALLY SURE, I have used it for 15 years for very high quality video but always thought 75ohm=video & 50ohm=RF PERIOD hard & fast rule.


Currently running 50' of RJ6 w/RF connectors for my wide band antenna & thinking of trying the triax against that for comparason. :roll:

 

[N_Jay]

I have an almost unlimited (don't ask :shock: ) supply of new 75 ohm Belden teflon coated Triax RJ/59 cables in several lengths.
I have/can get new 3Meters, 10m,30m,60m,100m triax all day long.

Any one ever used this or know if I could use it to my advantage for RX only antena feed line??????

The cables come with coax BNC connectors, but I would be willing to (gasp!) BUY triax connectors if I find out this stuff might work out.

Opinions???

Yes I realize it is 75ohm, and that's why I blew it off so far, but some opine it dosen't matter that much on relative short RX only feeders.
I'M NOT REALLY SURE, I have used it for 15 years for very high quality video but always thought 75ohm=video & 50ohm=RF PERIOD hard & fast rule.


Currently running 50' of RJ6 w/RF connectors for my wide band antenna & thinking of trying the triax against that for comparason. :roll:

RG-59 is no better than RG-58 and much worse than RG-6 loss wise.

Triax is used for video where ground current can affect the signal (not typically a problem with RF)

Find a video hobiest who needs the stuff.

 

[rasputen246]

Live & learn...

So 2 shields are of no use to shield out interference for RX???

It is my understanding this cable is high quality and has very uniform dielectric properties.

Are you saying it is not even worth trying in place of cheap RJ6???

Any one with other opinions?

 

[flyingwolf]

Give it a try and see what it does for you.

Cant hurt.

 

[fourwd1]

Give it a try and see what it does for you.

Cant hurt.

X2

 

[N_Jay]

Live & learn...

So 2 shields are of no use to shield out interference for RX???

It is my understanding this cable is high quality and has very uniform dielectric properties.

Are you saying it is not even worth trying in place of cheap RJ6???

Any one with other opinions?

IF, you had a serious interference problem related to noise getting into the cable along its run (as opposed to noise entering teh antanna), THEN it might be of some use.

If you had a ground loop problem or a noise problem due to currents on the shield THEN it could help.

These are not issues that happen in RF receiver systems. They ARE problems that occure in Baseband applications like VIDEO.

It is not DOUBLE SHEILDED, per say; it is designed to be used where the sheild needs to be isolated.


The "High Quallity and uniform dielectric properties are VERY important to video applications where you need constant loss and propagation from near DC to 10 or 15 MHz. It is irrelevent in a receiver system where you are only looking at 25 kHz at a time.

It is an RG-59 specificatin cable. You can LOOK UP THE LOSS.
You can compare it to RG-6.

You can say it is the best damn RG-59 out there and see if it is any better than teh worst RG-6 you can find.

This will tell you if it is worth your time. (it isn't).

Find someone who will pay you 1/2 of what it is worth as VIDEO cable, and use that money to buy realy good RF cable.

Any one with other opinions? (Based on facts, not guesses)

 

[rasputen246]

Excuse me for asking Mr N_Jay SIR.

Sorry to upset the God of RF. :shock:

 

[N_Jay]

Excuse me for asking Mr N_Jay SIR.

Sorry to upset the God of RF. :shock:

Sorry,

Asked;

Answered.

Asked again

Bad advice given

X2 :x

Answered agian, with more detail and some emphasis. :twisted:

 

[rasputen246]

Sorry N_Jay,

You are correct.
I am having a bad day ...trying to convert a primary boot fat32 XP partation to NTFS without loosing it.
Got a bit crabby. :evil:

BTW: I am using RJ6qs(for VHF/UHF) & LMR-400(800Mhz) for my antennas, was just trying to find a use for the Triax. :shock:

Sometimes :shock: I am a real smart a$$!!!

 

[N_Jay]

Sorry N_Jay,

You are correct.
I am having a bad day ...trying to convert a primary boot fat32 XP partation to NTFS without loosing it.
Got a bit crabby. :evil:

BTW: I am using RJ6qs(for VHF/UHF) & LMR-400(800Mhz) for my antennas, was just trying to find a use for the Triax. :shock:

Sometimes :shock: I am a real smart a$$!!!

No way, I'm the designated Smart-Ass for this thread, and the Union says we can only have one! :twisted:

Back up all you files to another drive, then do the conversion.

I used Partitian Magic once.

Worked like Magic! :wink:

Poof, and the whole patition disapeared! :evil: :evil: :evil:

 

[jim202]

Triax coax cable

It has been a long time since I saw a real "Triax " coax cable. When I saw it, it had 2 center conductors. It was the size of RG-8 type coax. You didn't mention anything about your cable having 2 center conductors, so I have to gather that your talking about a double shielded cable with an insulator between the shields.

You might want to do some research or a google to see just what most people call "Triax" coax cable. Some call a cable with isolated shields a triax cable, others like myself are more comfortable in having 2 center conductors a triax cable.

I am just interested in obtaining the full decription of the cable you have. There may be others on here that don't go as far back as some of us.

Jim

 

[N_Jay]

Re: Triax coax cable

It has been a long time since I saw a real "Triax " coax cable. When I saw it, it had 2 center conductors. It was the size of RG-8 type coax. You didn't mention anything about your cable having 2 center conductors, so I have to gather that your talking about a double shielded cable with an insulator between the shields.

You might want to do some research or a google to see just what most people call "Triax" coax cable. Some call a cable with isolated shields a triax cable, others like myself are more comfortable in having 2 center conductors a triax cable.

I am just interested in obtaining the full decription of the cable you have. There may be others on here that don't go as far back as some of us.

Jim

I think the 2 center condustor cable is Bi-Ax.

It is used to send a ballanced signal.

http://www.absoluteastronomy.com/encyclopedia/c/co/coaxial_cable.htm
http://www.epanorama.net/documents/video/triax.html

 

[rasputen246]

What I have/can get is Belden 8232 Plenum rated Teflon jacket.
It is Tri-Axial that is 1 center & 2 shields in 1 axis.

I have never heard of dual conductor called triax.

In some aplications one shield is powered for remote control or as an "active" shield.

My application is just for extra rf shielding, & we do not use triax connectors, just coax grounded to both shields.

Here is what I have my hands on right now, it is actually a GE jumper part & may not be exactly the same teflon jacketted stuff we use for long runs. But the guts are the same.

http://a2dsolutions.com/p443.html

We started using this when I worked for 3M in the 80's. I still can get them but I no longer work for 3M.