I bought a new radio last week so now of course I'm going over every little piece to make sure I'm getting the most outta it.
My current antenna set-up is a Wilson 2000 using a 24" SS shaft. I know you can't buy a 24" but I have family who owns a machine shop so he made me one.
I recently ran across a thread on here where it skewed off topic and a few people were debating aluminum shafts vs stainless. Is there a difference? and why?
And if you came in here because your dirty mind seen shaft and you laughed then go sit in the corner.![]()
Aluminum or Stainless steel shaft?
Discussion in 'CB Radio Forum' started by Colorato, Feb 5, 2013.
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I would use stainless steel. the difference is going to be non detectable at the receiving end. solid silver or gold would even be very hard to see any difference. I hope you have a heavy duty mount and bracket because that loading coil that high is going to put a lot of torque on the base. What length of a stinger you think you'll need? I guess with a lot of testing and cutting, you'll figure it out.
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Aluminum has MUCH lower electrical resistance than stainless steel. Electrical resistance = signal loss.
Simply put, RF energy spent heating up the antenna isn't going out into the air.
The question isn't which is better; the question is if it's worth the $$$ to get the aluminum mast. If you've grounded the base well, tuned and matched the antenna, bonded the major parts of the vehicle, and eliminated all ignition and alternator noise, then maybe it's worth the $20 for the aluminum mast.
The difference between a poorly installed antenna and a properly installed one is far greater than any difference in what the antenna's components are made of.
FYI, here's a 24" aluminum mast from a reputable company:
http://www.dxengineering.com/parts/dxe-mt-24 -
I've been running that lower shaft for a few months already. Definatly went with a heavy duty mount.
The stinger is still 49". The antenna is slighty tilted forward to keep the reflection from the truck down and help avoid limbs and dealing with the wind.
Everythings been great with the old radio and the new. SWRs are 1.1 1.3 and 1.5. Just got a new toy and it makes me reevaluate everything. -
I believe it was your discussion that start it all. Thanks.
Price and availability isn't the issue. I have 0 resistance on both the antenna and the coax. The antenna is not bonded any special way other than thru the mount which also has 0 resistance. I have some straps and I'm looking at a radial ground plane just haven't pulled the trigger. But I'm not sure about the radial ground plane either.Last edited: Feb 5, 2013
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Wouldn't a solid core shaft be more efficient than a hollow core?
With the tensile strength of aluminum being less than SS I'd worry about breaking it off and losing the entire antenna and damaging the coax.Last edited: Feb 5, 2013
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Nope. RF flows on the outer "skin" of the conductor. Nothing flows through the center.
If you hit something, you are more likely to break the coil than the mast.
Besides, the hollow aluminum mast will kink and bend; it would take repeated flexing before it would break.
Also, I'd rather lose a $60 antenna than a much more expensive mirror assembly...
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I have a thirty inch hollow aluminum. Works great.
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