| Author |
Message |
    
Mikefromms
Intermediate Member
Username: Mikefromms
Post Number: 390
Registered: 6-2003
| | Posted on Wednesday, January 26, 2005 - 3:27 pm: | 
|
Well, unless my swr meter has suddenly broken, my Imax 2000 shows less that 1.5 and in most cases 1:1 from 25,000 through 29,699 mhz. I think I'll check it with another swr meter just to be sure! I have the antenna on a test pole about 10 feet above the ground. The closest run of coax I have nearby is about a 200 ft. run of rg8x (don't ask me why I ever made up that length) Don't worry it won't be used when the Imax goes up in the pine. I have LMR-400 for most of that run with just a little rg-8x. Anyway, it's kind of like that commerical, "I can't believe it's butter." Well, I can't believe this Imax actually has this kind of low swr across so many frequencies. I feel like a fool for not already having bought one of these things. Like the other commericial, I'm saying, "wow, I could have had a v-8." This is the proverbial v-8.
mikefromms |
Chad
Intermediate Member
Username: Chad
Post Number: 108
Registered: 11-2004
| | Posted on Wednesday, January 26, 2005 - 3:42 pm: |
|
In CB bands I average between 1:1.1 and 1:1.5, I never touched the tuning rings! If it ain't broke........ |
Tech808
Moderator
Username: Tech808
Post Number: 4637
Registered: 8-2002
| | Posted on Wednesday, January 26, 2005 - 3:52 pm: |
|
Mikefromms,
On My Imax with Stock power I get SWR of 1:1, with between 700 and 1000 watts my SWR is 1:3 using 100' of RG213 to Imax.
On Beams a 1:1 with out power and with power a 1:2 using 70' of RG213
Lon
Tech808
CEF808
N9OSN |
Honkytonkman593
Intermediate Member
Username: Honkytonkman593
Post Number: 162
Registered: 12-2001
| | Posted on Wednesday, January 26, 2005 - 7:46 pm: |
|
running icom 718 with la amp 1000a at about 500 watts with a 1.1-1.2 swr. am very happy with coppers imax 2000!!! even tunes at 21 mhz with a flat swr weird huh. and yes im licensed ham as well. |
Mikefromms
Intermediate Member
Username: Mikefromms
Post Number: 392
Registered: 6-2003
| | Posted on Wednesday, January 26, 2005 - 9:39 pm: |
|
I'm a ham, also, and I look forward to switching the Imax between my Kenwood and Magnum 257. The Magnum 257 is my base station for cb now.
The Imax is hearing really good as I compare to the antenna still in the tree. Can't wait to get the gdp/kit on it (due tomorrow) and the good coax (Friday), and finally, get it up 70+ feet up in the pine tree! If this antenna responds to the rise in height there is no telling what I will be hearing.
Later,
Mikefromms |
Bob_p
Advanced Member
Username: Bob_p
Post Number: 662
Registered: 7-2004
| | Posted on Thursday, January 27, 2005 - 3:49 am: |
|
These are the maximum SWR readings I have on my I-Max 2000 and RCI 2970DX and Kenwood TS 480HX.
On the RCI 2970DX I used a Radio Shack SWR/Power meter and a PDC 600, the readings on the meters where within a point of each other.
1.5.1 from 28.300 to 29.000 (10m) High point 29.000
1.3.1 from 26.000 to 27.990 (11m) High point 26.000
1.4.1 from 24.930 to 24.990 (12m) across the band
On the Kenwood with a well-grounded MFJ-949-E Antenna Tuner SWR/Power meter not tuned I have a maximum of
1.5.1 from 28.300 to 29.690 (10m) High point 29.690
1.1.1 from 24.930 to 24.970 (12m) across the band
1.4.1 from 21.300 to 21.450 (15m) High point 21.450
1.5.1 from 18.110 to 18.168 (17m) across the band
On 20 meters the SWR is too high to use without an antenna tuner, but you can tune a flat SWR on 20m, and it does a fair job working DX.
When I was shopping for an antenna to go along with my RCI 2970DX, I did a search on the forum and read reviews on the I-Max covering 10 through 12 meters without an antenna tuner. So along with Tech833's review I decided to go with the I-Max 2000.
By the way I have never had to make any adjustments to the antenna when running power from 4 watts to 200 watts on a 50-foot section of RG-8x Belden Cable with Amphenol PL259 Connectors.
I hope you have as good of luck with yours as I have with mine.
Bob
|
Mikefromms
Intermediate Member
Username: Mikefromms
Post Number: 395
Registered: 6-2003
| | Posted on Thursday, January 27, 2005 - 6:06 pm: |
|
Thanks, Bob, for the information. The broad range on the Imax 2000 is far more than I expected. I was expecting something like a 3:1 on 25.000, 1:5 through 1:1 26.000 through 28.500 and a rise to about 3:1 at 28.800+. But no way! My swr never rises over a 1:5 anywhere on my Magnum 257. It is the most amazing range of useful frequencies I've ever seen. To me, this antenna is the hands down winner for an all-around base station antenna. How can you lose?
Mikefromms |
Gage
Intermediate Member
Username: Gage
Post Number: 134
Registered: 7-2003
| | Posted on Thursday, January 27, 2005 - 10:10 pm: |
|
Mikefromms
I never moved the rings on my I-Max2000 like I was told,tested SWR'S on the ground 1:3 put it up 1:1 with 100 watts and through the band the I-Max was very close to this without running the tuner!
Take care all!!Gage |
Skilletlicker
Intermediate Member
Username: Skilletlicker
Post Number: 182
Registered: 5-2002
| | Posted on Friday, January 28, 2005 - 2:03 pm: |
|
i have had good swr on my antron 99 ,good on all
40 channels ,have never had to retune it ,from the factory settings,also easier to install ,without anyones help
skilletlicker
|
