Sigma 5/8 Cb Antenna
Alpha V5/8 & V5000 CB Radio Base Station, Omni-directional: Download Manual: The V58 is a highly efficient 5/8 wave commercial antenna with outstanding base station performance. It is field tunable to cover from 26-33 MHz. Best radio mods fallout 4. The Standard Gamma match is rated at 1200 watts. Jul 11, 2009 The last pictures shows a couple of original Sigma IV antennas, some new Alcoa 6061-T6 aluminum (.058 wall x 12' each, from 1/2' to 1 3/4'), and some old ham radio antennas I've remove from towers for other people. This is only abou 1/10th of the aluminum I have at home. I've done my best to illustrate the two versions of the Sigma 5/8.
Additional Information HF Vertical Antenna Band12 meters10 metersThese true full size 5/8 wave, 10/12 meter Hy-Gain SPT-500 Vertical Antennas were a legend in the '70s-now they're back to claim that status once again!A full size radiator with a lower radiation angle concentrates power closer to the horizon where you want it. SPT-500 antennas measure 22 ft., 9.5 in. High with large diameter, heavy-wall tubular construction that puts the new SPT-500 Super Penetrators among the top omnidirectional antennas around!Four full-length radials and special machine-formed brackets give extra talk power and overall strength. Electrical performance has set a new standard with the use of a longer radiator and double-matching tuning with linear phasing techniques that provide a low SWR and more radiated energy. Double-matching also provides a DC path to ground to drain off precipitation static, resulting in extremely low-noise antennas capable of high power.SPT-500 antennas are specifically designed to accept up to 1.5 kilowatts with low loss. Order your Hy-Gain SPT-500 Vertical Antennas from DX Engineering! I have had a few Penetrator 500 antennas over the years and this one has been the worst as far as quality of manufacture.None, absolutely none of the vertical or horizontal elements will securely mount to the next one it connects to.
It seems that all of the swaged down joints were done incorrectly. None of the clamps will close the splits and secure the next element.Sloppily done.
Update.I contacted Hy-Gain (MFJ) and submited a 'problem ticket'.Customer Service has offered to supply me with new replacement vertical and horizontal tubing elements.I will see how all fits when I receive them. As a USAF CommTech, a Commercial CommTech and an Amateur for 31 years, I have assembled many types and varieties of antennas. My experience with the SPT500 was exceptional. Everything fit together nicely, not a single problem except for the screw that holds the capacitance hat radials was about a fraction too long so I had to grind it down so that it would tighten and hold the radials securely.
I am very pleased with the quality and the performance on 10 meters. After reading other reviews, I don't understand how anyone could not possibly consider this a high quality antenna. Nice job HyGain! As a USAF CommTech, a Commercial CommTech and an Amateur for 31 years, I have assembled many types and varieties of antennas. My experience with the SPT500 was exceptional. Everything fit together nicely, not a single problem except for the screw that holds the capacitance hat radials was about a fraction too long so I had to grind it down so that it would tighten and hold the radials securely.
I am very pleased with the quality and the performance on 10 meters. After reading other reviews, I don't understand how anyone could not possibly consider this a high quality antenna. Nice job HyGain!Published on January 18, 2019 by Jon. I have had a few Penetrator 500 antennas over the years and this one has been the worst as far as quality of manufacture.None, absolutely none of the vertical or horizontal elements will securely mount to the next one it connects to. It seems that all of the swaged down joints were done incorrectly. None of the clamps will close the splits and secure the next element.Sloppily done. Update.I contacted Hy-Gain (MFJ) and submited a 'problem ticket'.Customer Service has offered to supply me with new replacement vertical and horizontal tubing elements.I will see how all fits when I receive them.Published on February 13, 2018 by STEVE.
I guess the best instruction i could give is to not be afraid to try. I just copy time proven designs, i'm not trying to reinvent the wheel.
Keep it simple for your first antenna, like a dipole or 1/4 wave ground plane. When it works you'll have a lot more confidence to try something bigger.i have no idea how much power it will handle, i only run 200 pep. I built it really strong physically to be sure it can survive the hurricanes we get here on occasion. I guess the weak point power wise would be the mobile stud mount or the tape used for the insulator in the gamma. It would be very simple to direct feed it from the coax to eliminate the stud. And a teflon tube can be had for it for 10-15 bucks, if i recall correctly.
Or a better/stronger gamma could be added. I'm sure the rest of it could handle several thousand watts or more easily. Well in the past I have found that most base antenna are able to hold more power than they are rated with some small mods. It all depends on if it is a fiberglass or a alum.
The antennas such as antron 99 and the imax 2000 are pretty much what they are but other that are alum. Can hold more.
Sigma 5/8 Cb Base Antenna
Some alum antenna's such as the maco V58 and simlar are controlled by a coax connector and a wire. You can change the wire size and go to better connector for more wattage handling or even just hot feed it and bypass the coax connector and wire for a very high wattage rating. Other antenna are controlled by a gamma such as the antenna talked about in the post or even a beam antenna.
On this case just buy a larger gamma or make your own with teflon or delron. The main thing to know is other than the gamma or such thing the coax and coax connectors are your weakest link. So I sugguest hot feeding if you are running anything above 7.5Kw bird Rms. Hope this helped. Booty Monster I love that Antenna to death. But Rule Of Thumb says you are not suppose to make wraps like that with your coax being the feedline transmission.
It will eliminate noise yessssss. But you will loose velocity as well as gain factor and forward gain. This has been proving when some of the big boys do that on there beams and they make silly wraps like that. You get a weak spot or a hot spot in time when you run power through it, and in time the coax will fail at the wraps cause the energy will be so compressed and focused like running current through a small piece of 16 gauge wire. Your performance would be much superior with an AIR VARIABLE CAPACITOR with a voltage rating of 5000 volts or higher. 3-200 pica farads is nice. Sometimes you have to go lower, it will depend on your wavelength.Last edited by High Voltage Mobile NJ; at 03:25 PM.
Thanks for the compliment'. But you will loose velocity as well as gain factor and forward gain. This has been proving when some of the big boys do that on there beams and they make silly wraps like that. 'if by bigboys you mean folks on the super bowl. Spare me.i've never noticed or read any of the negative comments about coax chokes that you mentioned.
Sigma Venom 5/8 Wave Cb Antenna Dealers
Can you elaborate on the how/why of that happening?Last edited by BOOTY MONSTER; at 01:06 PM. Thanks for the compliment'. But you will loose velocity as well as gain factor and forward gain. This has been proving when some of the big boys do that on there beams and they make silly wraps like that. 'if by bigboys you mean folks on the super bowl. Spare me.i've never noticed or read any of the negative comments about coax chokes that you mentioned. Can you elaborate on the how/why of that happening?
Aluminum Cb Base Antenna
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