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Message |
    
Mrclean
Junior Member
Username: Mrclean
Post Number: 23
Registered: 12-2003
| | Posted on Tuesday, January 31, 2006 - 11:19 am: | 
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I talked to Ken at Anttron and he said the 305 was about 3 months away. Question for those using them. Are they better than Imax? Do they tend to cause TVI RFI problems |
Tech808
Moderator
Username: Tech808
Post Number: 9149
Registered: 8-2002
| | Posted on Tuesday, January 31, 2006 - 5:25 pm: |
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Mrclean,
Having been an Antron / Anttron dealer for the last 30 years and having worked with Frank and Martha and Frankie Jr at Antron/Anttron as well as Ken and Sammie at Anttron I have been lucky enough to use both antennas over the years.
The Anttron 305 and IMAX 2000 with the GPK kit are BOTH Great Antennas.
As with our older Anttron 305 manufactured by Frank, Martha and Frankie Jr. I would have to give the advantage to the IMAX 2000 with GPK kit from our own personal experience with both antennas.
I just called and talked with Ken and I look forward to seeing / using and testing a  305 as soon as he gets them made.
Ken said it may even be sooner than 3 months depending on when he can get the fiberglass blanks from overseas as they will be imported.
As soon as he gets one made and out to me I will do Review on it for the Copper Forum Members. 
Do not forget that Copper Electronics is also an Authorized Anttron Antenna Dealer 
Lon
Tech808
CEF808
N9OSN |
Tech808
Moderator
Username: Tech808
Post Number: 9150
Registered: 8-2002
| | Posted on Tuesday, January 31, 2006 - 5:39 pm: |
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From thre ORIGINAL ANTTRON 305 Ad.
ANTTRON 305
10 - 11 Meter Super Base Antenna
* The ANTTRON 305 breaks through with Extended performance, the 5/8 wave design has greater signal gain then the conventional antenna designs. The three Radials increase power, reduces the angle of radiation , puts more usable signal to the horizon, resulting in a effective increase of (E.R.P. ) Effective Radiated Power
* The ANTTRON 305 Features A Adjustable Tuning Sleeve Making It Possible To Tune The Antenna To The Lowest S.W.R. Over A Range Of Frequencies
* High Gain Talk Further - Hear Better - As Much As 6 dB Less Noise
* Relative Gain - 12.3 dB
* Isolation Network Keeps Interference Down From Surrounding Electrical Enviroment
* D.C. Grounded For Static Discharge
* 2500 watts P.E.P.
* Impedance 50 Ohms Nominal
* Total Length - Aprox. 18 Ft. - 3 Sections - U.P.S. Shippable
* Fiberglass Construction - Commercial Grade - Easy To Assemble
* Tunes 26 - 29 Mhz.
* SO-239 UHF Connector
* ARK-4 Antenna Ground Plane Kit Available
Lon
Tech808
CEF808
N9OSN
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Mrclean
Junior Member
Username: Mrclean
Post Number: 24
Registered: 12-2003
| | Posted on Tuesday, January 31, 2006 - 9:17 pm: |
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How were the older 305s as far as TVI RFI? Oh and thanks for the responce. |
Tech808
Moderator
Username: Tech808
Post Number: 9155
Registered: 8-2002
| | Posted on Tuesday, January 31, 2006 - 9:40 pm: |
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Mrclean,
I had NO TVI / RFI Problems with the Anttron 305 and I have NO TVI / RFI Problems with the IMAX 2000 with GPK Kit.
Lon
Tech808
CEF808
N9OSN |
Scoobydoo
Member
Username: Scoobydoo
Post Number: 61
Registered: 8-2005
| | Posted on Wednesday, February 01, 2006 - 1:43 am: |
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I'm confused, doesn't the Anttron 305 have a 3 radial ground plane? At the bottom of your post Tech 808, you list an optional ground plane kit for it. Does the new 305 not come with radials? |
Tech808
Moderator
Username: Tech808
Post Number: 9157
Registered: 8-2002
| | Posted on Wednesday, February 01, 2006 - 3:56 am: |
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Scoobydoo,
Sorry but NO the original Anttron 305 did not come with a GP Kit as that was an option as stated in the original ad above.
As for the Anttron 305 I would have to guess that it will also be an Option.
Here is a drawing of the Original Anttron 305.
I can only guess that Ken will make the Anttron 305 exactly the same, as he did not mention making any changes to the original design.
Here is a LINK to an article on the Anttron 305 for more information.
AnttronŽ 305 Revisited
Lon
Tech808
CEF808
N9OSN |
Wildrat
Advanced Member
Username: Wildrat
Post Number: 732
Registered: 12-2003
| | Posted on Wednesday, February 01, 2006 - 9:09 am: |
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looks like a Antron 99 with one of those inexpensive ground plane kits stuck between the first and second part of the antenna. |
Tech833
Moderator
Username: Tech833
Post Number: 1180
Registered: 8-2002
| | Posted on Wednesday, February 01, 2006 - 10:38 am: |
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I still have a 305 in my barn with a fractured fiberglass shell. It broke where the top ferrule on the bottom section is connected to the fiberglass shell. I do hope that the new 305's will be stronger than the original ones.
I purchased that antenna because it was advertised to be physically stronger than the A99's and other knock-offs. However, my experience was the opposite.
I kept it because I figured someday (my 'someday pile' keeps growing) I would re-glass that antenna and hopefully use it. |
Marconi
Advanced Member
Username: Marconi
Post Number: 573
Registered: 11-2001
| | Posted on Wednesday, February 01, 2006 - 3:00 am: |
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He Lon the little blurb you noted above for the 305 speaks about an Isolation Network. The Imax produces a ton of RF on the feed line when installed without the GPK and I imagine the same is also true even if the GPK is installed on the Imax. Lon maybe you did not know this fact, but maybe someone else knows if the 305 addresses this issue and improves on this common mode problem in the new Anttron as compared to the Imax.
My Imax antenna makes about as much RF on the feed line and supporting mast as does the part that I think is the actual antenna from the feed point up to the tip of the antenna, and that is the way the Imax and the A99 work. |
Tech808
Moderator
Username: Tech808
Post Number: 9157
Registered: 8-2002
| | Posted on Wednesday, February 01, 2006 - 4:44 am: |
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Marconi,
As for your question I honestly have no idea, but maybe Paul-Tech833 can answer it for you as I do not get into the technical aspects of antennas or even care to.
When I have an antenna problem or question I just Call or e-mail Paul-Tech833 and he has always been very helpful.
The only thing I do with antennas is order them, assemble them per instructions or Tips from Tech833 and put them up and expect them to work.
I just posted in the other topic that I personally have never had any TVI or RFI problems when using either the Anttron 305 or Imax 2000 with GPK Kit, if that is what you are asking about.
Sorry I cannot be of more help in answering your question.
Lon
Tech808
CEF808
N9OSN |
Marconi
Advanced Member
Username: Marconi
Post Number: 577
Registered: 11-2001
| | Posted on Thursday, February 02, 2006 - 3:55 am: |
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Thanks Lon, but I'm not really saying that this is the cause of TVI, cause I don't think that is quite true. It is not so much an issue of TVI with me as it is that these antennas produce such a big signal from the feed line.
I have tested the GPK on an A99 before, but I did not consider this issue at the time. I was just looking for other types of responses from the antenna. I those cases I did not notice any changes at all, but that does not mean that there were none. I just did not see any ill or positive effects at the time of testing.
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Dale
Intermediate Member
Username: Dale
Post Number: 311
Registered: 12-2002
| | Posted on Friday, February 10, 2006 - 10:23 pm: |
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i tried the old 305 i noticed the floornoice was alot quieter.both were tested without gpk,same coax,sameradio,same mounting location.i also noticed that the 305 recieved better than the imax on a 30or more mile area.the imax seemed
too have a little more tx punch in 30 mile radious.close by 10-15miles i seen no difference
at all.on dx 500mileor more the 305 had a very slight edge.my only question is they advertise as a 5/8 wave but its only 18ft long how can that be when 1wave lenth is 36ft?
dale/cef426 |
