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Post by Night Ranger on Jul 29, 2008 8:04:17 GMT -5
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Post by bob85 on Jul 29, 2008 20:09:50 GMT -5
mosley also have a dispatcher dp-275 listed in the commercial section which looks identical, you may have more look finding that one, most of the first 5/8 were about the same length, possibly due to fcc height restrictions, www.mosley-electronics.com/page%20files/commercial.htmthanks for posting the assembly instructions i have wanted a better look for a few years. |
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Post by BladeRunner now OLD FLASH!!!!! on Jul 29, 2008 21:43:42 GMT -5
The only problem with that logic is why thy would advertise an antenna that's not even close to 5/8 wavelength because of FCC regulations. FCC regulations can't change the laws of physics. I would believe more the company making the antenna just taking advantage of naive customers not knowing how long a 5/8 wave antenna supposed to be. Just like the way companies manipulate different types of db gain there are and exaggerating those measurements. And charging 200 and 300 bucks for a dipole or ground plane antenna that's no better than on at 1/3 the price. They are making a killing.
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Post by bob85 on Jul 30, 2008 0:54:13 GMT -5
im not sure that is the reason several 5/8 were just under 20ft,
im in the uk and oures could not have a radiator longer than 1.5meters,
your fcc part95 regs state this about antennas,
"RULE 8 - Antenna Height
{A} "Antenna" means the radiating system (for transmitting, receiving or both) and the structure holding it up (tower, pole or mast). It also means everything else attached to the radiating system and the structure.
{B} If your antenna is mounted on a hand-held portable unit, none of the following limitations apply;
{C} If your antenna is installed at a fixed location (whether receiving, transmitting or both) it must comply with EITHER one of the following:
[1] The highest point must not be more than 20 feet (6.10 meters) higher than the highest point of the building or tree on which it is mounted;
or
[2] The highest point must not be more than 60 feet (18.3 meters) above the ground.
{D} If your CB station is located near an airport, and if your antenna structure is more than 20 feet (6.10 meters) high, you may have to obey additional restrictions. "
hygain also claimed the CLR-2 was the maximum legal height,
"Maximum
legal height provides the largest signal capture area. A top hat and a long radiating
element create a full 5/8 wave radiator. This achieves the lowest possible angle of radiation
by aiming most of the rf energy along the horizon for greater range"
the makers claimed their extended antennas which were anywhere from just under 20ft up to about 22.5ft sometimes with a cap hat to electrically but not physically lengthen them were 5/8waves,
only the 20ft and under antennas were legal to mount on the top of your house mast or tree if you used them on cb radio.
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Sandbagger
Administrator/The Boss 
Posts: 6,250 
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Post by Sandbagger on Jul 30, 2008 7:09:42 GMT -5
Some of you guys are on to something. Once upon a time, the FCC rule for antenna mounting was 20' above the highest point of the mounting structure. It was in the mid 70's when the 60' above the ground was added to the rule.
But back in the days when the limit was 20' over the roof, it made it tough to make an antenna longer than 20'. It's a bit cumbersome mounting a 23' long antenna (with 3 or 4 8' radials) 3' BELOW the roof line. Just about all of the antennas marketed as "5/8th" wave antennas in the 70's were 19' something" long. It was no coincidence that when the 60' FCC antenna height rule was adopted, that a whole slew of ".64 wave" antennas appeared on the market which were in the neighborhood of 23' long. I'm sure the ".64" wave designation was to differentiate these antennas from the older (and shorter) "5/8th" wave designs.
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Post by marconi390 on Jul 30, 2008 7:14:32 GMT -5
The only problem with that logic is why thy would advertise an antenna that's not even close to 5/8 wavelength because of FCC regulations. FCC regulations can't change the laws of physics. I would believe more the company making the antenna just taking advantage of naive customers not knowing how long a 5/8 wave antenna supposed to be. Just like the way companies manipulate different types of db gain there are and exaggerating those measurements. And charging 200 and 300 bucks for a dipole or ground plane antenna that's no better than on at 1/3 the price. They are making a killing. rbduck, where do you see the DP-275 is too short to be a 5/8, if that is the antenna you are referring to? |
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Post by BladeRunner now OLD FLASH!!!!! on Jul 30, 2008 14:05:31 GMT -5
If teh Devant special and the radiator length is 19' 5 /4 " is over a coupe of feet short of a 5/8 wave. Now if you are using the top hat as part of the radiator length hat could make up the diference. They also advertise a Devant 1 that has the same radiator length but without the tophat. that is definately not 5/8 wave.
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Post by mark4 on Aug 9, 2008 9:49:48 GMT -5
Mosley may show that antenna available.
But I don't think they have updated their site for years.
Looks like they planned on making this thing and never followed through.
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**GRUMPY**
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Classic Radio Operator Olde Timer 8220 [/color][/center]
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Post by **GRUMPY** on Aug 9, 2008 10:21:25 GMT -5
Mosley may show that antenna available. But I don't think they have updated their site for years. Looks like they planned on making this thing and never followed through. |
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Macabee
Big Bucket Mouth
The Hammer
Posts: 93
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Post by Macabee on Aug 9, 2008 12:00:19 GMT -5
Fcc nor anyone else can change the laws of physics. Esp electronics. There have been forumals for many many years to find out all requirement to building any antenna. here is a link to help. www.qsl.net/kb5wck/antenna.html#Quad%20Antenna |
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Post by mark4 on Aug 9, 2008 13:36:49 GMT -5
I read somewhere about these 11 meter ground planes
By Mosley. Trying to find it. That is why I posted-"updating their site". Still not ready for prime time. It sure would be nice if they would follow through. I sent a message to HY-Gain asking them to start making the Super Penetrator again. Don't expect anything to happen! Macabee that is a helpful post.
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Post by Night Ranger on Aug 9, 2008 19:53:03 GMT -5
I read somewhere about these 11 meter ground planes By Mosley. Trying to find it. That is why I posted-"updating their site". Still not ready for prime time. It sure would be nice if they would follow through. I sent a message to HY-Gain asking them to start making the Super Penetrator again. Don't expect anything to happen! Macabee that is a helpful post. I'd like to have a Hy-Gain Long John 5 element flat beam. Guess I'll just have to build one myself. |
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Post by marconi390 on Aug 9, 2008 21:59:59 GMT -5
I read somewhere about these 11 meter ground planes By Mosley. Trying to find it. That is why I posted-"updating their site". Still not ready for prime time. It sure would be nice if they would follow through. I sent a message to HY-Gain asking them to start making the Super Penetrator again. Don't expect anything to happen! Macabee that is a helpful post. I'd like to have a Hy-Gain Long John 5 element flat beam. Guess I'll just have to build one myself. Night Ranger check out this thread: grumpy.proboards11.com/index.cgi?action=display&board=SALE&thread=3762 |
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Macabee
Big Bucket Mouth
The Hammer
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Post by Macabee on Aug 9, 2008 22:27:30 GMT -5
No probs mark4... I hope that it helps those looking to build.
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Post by mark4 on Aug 11, 2008 20:50:15 GMT -5
I know, I have (2) V 5/8 and V5000.
Same exact antenna except for the Teflon insulator on the 5000.
And we know that a 20ft antenna is not a true 5/8 wave.
Never the less this antenna really works well. Some what narrow banded. But if you have a TVI problem it's worth a try.
But so glad I located my Rat Shack .64 Wave. I won't get into that one right now.
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Post by zman on Sept 24, 2008 9:32:40 GMT -5
Anything made my Mosley will cost big $$$$! But thier triband beams are pretty good. I dont know why they think they have to charge big bucks for the Devant special antennas though whey they are pretty much just a mediocre antenna compared to the other ones out there floating around.. I do know they are a military contractor and make antennas for our guys overseas.
Too much $$$ for me. Ill stick with my old Avanti stuff.....
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Post by ak3383 on Sept 12, 2009 22:23:41 GMT -5
Where can Mosley antennas be purchased at??? I have an old (1967) set of Mosley double stacked 3-element beams I would like to trade for one of their ground planes but I'm sure they are not into trade-in.
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Post by zman on Sept 18, 2009 15:29:52 GMT -5
How much would you sell them for? Im interested.
The problem with Mosley is they are a big military and government contractor, and getting any antennas from them is hard. Basically what they will do is they put you on a list and you might/might not get your antenna in a timely matter. You might not see your antenna for 6 to 8 months up to a year. I have an old Mosley TA-36 6 element 10,15 and 20 meter tribander that i needed to get a new balun for. They told me it was $85.00 for the balun, but the lead time was 3 to 6 months before id ever get it!:-)
Just like the ARMY, "Hurry up and wait!"
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