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Author Topic: Feedlines at the Equipment  (Read 1037 times)
N3CRS
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Posts: 5




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« on: January 18, 2009, 08:14:28 AM »

I am looking for suggestions as to the best coax to use at my equipment. It is very cumbersome managing my RG-8 type coax connecting from the rig to the tuner to the amp etc. I do not have a lot of room behind my equipment. Is there a thinner and more flexible coax to use that will not sacrifice performance.

73,

n3crs,

SCOTT
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KB9CRY
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« Reply #1 on: January 18, 2009, 09:13:53 AM »

8X
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N3CRS
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« Reply #2 on: January 19, 2009, 10:13:21 AM »

Thanks for the feedback. What type of connector do I use with this for connecting to so-239's?

n3crs
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K6REA
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« Reply #3 on: January 19, 2009, 11:00:23 AM »

Hey Phillip,

how is RG-8x for runs up to 100' for the feedline to antennas ?
is it as good as the bigger RG-8 ?

kevin
palmdale, calif.

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AA4PB
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« Reply #4 on: January 19, 2009, 02:12:06 PM »

They make reducing adapters for PL-259 connectors that fit RG8x.

RG8x has more loss than RG213 (RG8 sized). That's no problem for short runs and jumper cables and may be fine for a run to the antenna, depending on the frequency and length of the run.
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KB9CRY
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« Reply #5 on: January 19, 2009, 03:30:16 PM »

I would and have used 8X for 100 foot runs to 40 and 80M antennas and have run my amp into that no problem.  For the higher bands, then loss becomes a factor and I have always used RG-213, especially with the amp.

Look up the loss tables and make your selection.
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K7PEH
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« Reply #6 on: January 19, 2009, 10:34:01 PM »

Also, when you get those reducing adapters to fit the PL-259 make sure you get the size for 8X.  I think the other cable close to that size is a little smaller (or, is it the other way around).  But, there are two different sized adapters that look the same with a quick glance so make sure you know the adapter is for 8X.
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W3LK
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« Reply #7 on: January 20, 2009, 07:34:28 AM »

RG-58 requires a UG-175 adapter to put a PL-259 on the cable.
RG-8X requires a UG-176 adapter to put a PL-259 on the cable.

8X is larger in diameter than 58.

And no, you can't "drill out" a UG-175 to make it fit 8X.

73,

Lon - W3LK
Naugatuck, Connecticut
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W3LK
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« Reply #8 on: January 20, 2009, 07:38:22 AM »

Personally, I don't bother with the reducers. I use crimp-on PL-259s made especially for 8X. In fact, I use crimp-on PL-259s for everything inside the shack, no matter what the size of the coax.

They are much easier to install and, when installed properly, are indistinguishable in performance from soldered PL-259s.

73,

Lon - W3LK
Naugatuck, Connecticut
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K2FOX
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« Reply #9 on: January 20, 2009, 09:50:52 AM »

RG-8X is a good choice, but beware. There are differences in loss characteristics and power handling capability. Belden cable is a good choice (see EHAM product review http://www.eham.net/reviews/detail/5051). A UG-176 adapter will be needed when installing PL-259's.

I use Andrew Heliax FSJ4-50B 1/4" coax. It's fairly flexible and has very good loss and power ratings. No special connector is needed. I use a standard PL-259 and a UG-176 adapter. I drill two small holes in the adapter, strip the outer shield off the Heliax, slide the adapter on and solder right to the corrugated outer shield. Then screw on connector and solder center conductor.

Don't care much for crimp on connectors of any type. Not reliable if removed frequently.

73's

Jay
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K2FOX
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Posts: 99




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« Reply #10 on: January 20, 2009, 10:08:12 AM »

 by W3LK on January 20, 2009     

"And no, you can't "drill out" a UG-175 to make it fit 8X."

Actually, you CAN drill out a UG-175. I have done it many times. I wouldn't recommend using a n hand drill though.
I used a drill press and had adapter locked into a vise.

73's

Jay
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W3LK
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« Reply #11 on: January 20, 2009, 10:48:01 AM »

<< Don't care much for crimp on connectors of any type. Not reliable if removed frequently. >>

If properly installed, crimp connectors are just as reliable as soldered connections. It's interesting to note that virtually all PL-259s used in commercial applications are crimped on.

The key, like anything else, is proper installation with the correct crimping tool.

73,

Lon - W3LK
Naugatuck, Connecticut
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W3LK
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« Reply #12 on: January 20, 2009, 10:52:13 AM »

K2FOX:

With all due respect, just because something can be done does not mean it should be done. Smiley

I have never understood "jury-rigging" something when the correct item is readily available.

73,

Lon - W3LK
Naugatuck, Connecticut
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K2FOX
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« Reply #13 on: January 20, 2009, 11:01:46 AM »

Lon,

I agree that just because something can be done does not mean it should be done. However, in this case I will disagree with you. I don't consider it "jury-rigging", I will call it improvising. In no way was the mechanical integrity compromised, and none of the connections has ever failed.

Don't be afraid to experiment, Lon. After all, that's what makes this hobby so much fun.

Jay
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W3LK
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« Reply #14 on: January 20, 2009, 01:16:49 PM »

Over the last 40 years I have done LOTS of experimenting.

I've also trashed my share of UG-175s drilling them out, too. Smiley

To each their own weirdness.

Stay warm. I have a foot of snow in my yards!

73,

Lon - W3LK
Naugatuck, Connecticut
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