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| Which one - Sirio GPE 27 5/8 or Sirio 827 | |
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| Tweet Topic Started: Sunday, 1. November 2015, 23:17 (749 Views) | |
| Jape | Sunday, 1. November 2015, 23:17 Post #1 |
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26 Charlie Tango 1894
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I need to get a new antenna but don't have any experience of the up to date equipment. I have narrowed it down to two: The Sirio GPE 27 5/8 or the more expensive - double the price - SIRIO 827 VERTICAL CB BASE. I don't know if the more expensive one is really necessary for my needs is there any real advantage? I may go for a 10 metre licence later later Are the two comparable performance wise? Is there something else I should look at? I will be using 213 cable Thanks |
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| Jape | Monday, 2. November 2015, 10:37 Post #2 |
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26 Charlie Tango 1894
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I just suddenly remembered - the now non working one is an Antron half wave - so I better put another of those back in the equation. Is the Siro 5/8 wave better.... James |
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| Staffy 48 | Monday, 2. November 2015, 14:57 Post #3 |
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Don't rule out the I-Max 2000, the 5/8 wave big brother to the A99, I run one and it performs well. |
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| richs1882 | Monday, 2. November 2015, 15:00 Post #4 |
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26 Charlie Tango 1767
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I have the gpe27 only 12ft off he ground on an aluminium pole and it gets out well. Decent on ground wave and great on dx. Never use more than 25watts and have had many contacts recently. |
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| Mudslinger | Monday, 2. November 2015, 20:45 Post #5 |
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The 827 should have a slight edge over the GPE27, but it won't be very much. Both should outperform a half wave pretty easily though. I have the GPE27 and it is a great antenna, cheap to buy works well and isn't too much of an eye sore. |
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| Jape | Tuesday, 3. November 2015, 12:20 Post #6 |
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26 Charlie Tango 1894
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I'm sorta sold on this 5/8 but.. I now plan to put the rod back on top of my 60 foot tree. Am I right in thinking: - A hilf wave high up will be better than a 5/8 lower down? Obviously a 5/8 up high would be ideal - but I'm a little concerned about high winds Garden is exposed here and the wind does swish across the fields. Also - will a 5/8 be more likely to put out interference on neighbours? James Edited by Jape, Tuesday, 3. November 2015, 12:20.
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| Staffy 48 | Tuesday, 3. November 2015, 14:10 Post #7 |
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Most electrical equipment these days, TV's and the like are all digital and the chances of you causing RFI, although possible, is very remote, in the old days, 70's, 80's it was said that providing you were a full wave length away you wouldn't create TVI/RFI and the higher up your antenna the less chance of causing interference, how true that is I'm not sure, I know that I don't create any interference to my neighbours, I've asked around, but they cause me grief with their PLT's and plasma TV's. So the further your antenna is away from your house and your neighbours the better off you are, my antenna is on a pole attached to the side of the house and the base of it is at 18ft, I have as said, an I-Max 2000 5/8 wave which has a slightly better dB gain than an A99 and the beauty of these antennas, A99 and I-Max, is that they come pre-SWRed for 11 metres and is also good for a fair way on 10metres, a good coax also helps and if I remember rightly you use RG 213, I use RG 8 mini and have no problems, what I do have is 6 inch, 6 turn air coil just over 1 foot below the connection to the antenna and I believe this helps too in stopping RF coming back into the shack and will reduce any spurious RF possibly interfering with your neighbours equipment, just remember, if you intend to make an air coil, say the same as mine, it will mean adding over 9ft of extra coax. The two antennas, A99 and I-max are both white fibre glass and you could always spray the antenna of your choice green or brown to help camouflage it if you put it back in the tree. Also my antenna is between the houses and the prevailing wind, South Westerly, cuts straight through there, yes, it bends some what when it blows a hoolie but I've not had any problems so far. P.M.ed You
Edited by Staffy 48, Tuesday, 3. November 2015, 14:13.
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| Jape | Tuesday, 3. November 2015, 14:40 Post #8 |
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26 Charlie Tango 1894
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Hi Pat - thanks for that excellent info I was happy with the antron - and now leaning toward the I-MAX Local tree guy is taking the antron down tomorrow and going to put up the new one for me As he knows nothing about radio I have to make this procedure idiot-proof Obviously I am going to set this up on the ground and run it for a week or so before it goes up Providing he is confident with going up with a longer one - I will go for that One last question right now - as I read this somewhere. Once you set up the SWR at ground level does it change as you go higher? I won't be able to get up there later of course, and don't expect the guy to be interested in doing anything else James |
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| Staffy 48 | Tuesday, 3. November 2015, 16:15 Post #9 |
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On the A99/I-max you just have to put them up and start DXing as they are pre-SWRed at the factory, but common sense tells you that you have to check the SWR, I checked mine on 4 watts and it hardly moved the needle on the SWR meter, my coax run I worked out that the length required was 54ft, 1.5 wave lengths at 11metres, you'll have some who'll tell you that it doesn't matter about the length of coax but me being old fashioned I kept it at the recommended 1/4 wave lengths or multiples of to give a low SWR reading. I've been looking through my scribblings as I know that I've written it down somewhere that when I did the SWR readings with a high wattage it was 1.5:1 round about 26.500 Megs and the same at about 28.500 Megs and on 27.000 it was on 1.05:1, can I find where I wrote it down ? Can I heckers like! |
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| Nubster | Tuesday, 3. November 2015, 17:26 Post #10 |
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26 Charlie Tango 050
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James the IMAX is a great antenna , but if you are putting it back within a tree first thing is Imax's do sway in the wind a bit and cos its going in a tree it will sway even more , my mate runs a Imax and has it happens it's up his tree also a very tall tree TBH and when the wind blows that Imax does whip about when the tree does but my mate does go over the top with hight on his antennas and will climb anything that's why his nickname is Monkey Boy and TBH it was a to get the Imax up the tree only really cos the size of it but as I said my mate he mad so it did'nt matter LOL . dont discard thinking about another A99 get that up high is just as good TBH P. S I dont want to start the useual war thread of Imax v A99 V Gainmaster by saying this LOL but also consider a Gainmaster thats what use you just put it together exactly how they say in the instructions put it up forget it , thats what use
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Life is too short, so ave a laugh now n then never know you might like it | |
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8:46 AM Jul 11
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to get the Imax up the tree only really cos the size of it but as I said my mate he mad so it did'nt matter LOL . dont discard thinking about another A99 get that up high is just as good TBH
8:46 AM Jul 11