|
New to Ham Radio?
My Profile
Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question
Operating
Contesting
DX Cluster Spots
Propagation
Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers
Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net
|
| Reviews Summary for BALUN DESIGNS Dual Core 4:1 Current Balun 5kw Teflon #4115 |
|
Reviews: 12
|
Average rating: 5.0/5
|
MSRP: $97.95
|
Description: For the ham that wants the ultimate 4:1 current balun, this new dual core design fills the need! This is a balun originally designed by Guanella and subsequently improved by Dr. Jerry Sevick (W2FMI). By utilizing Thermaleze wire inserted in teflon tubes, Dr. Sevick was able to substantially increase the breakdown voltage between both conductors and windings while improving the overall input impedance. Building the balun with two separately wound cores (one for each conductor) creates 5kw of total power handling (10kw PEP) and greatly increases the inductive reactance.
|
|
Product is in production.
|
|
More info: http://www.balundesigns.com/servlet/the-78/*NEW*-Dual-Core-4-cln-1/Detail
|
|
Email Subscription
You are not subscribed to this review.
Subscribe!
My Subscriptions
Subscriptions Help
|
You can
write your own review of the BALUN DESIGNS Dual Core 4:1 Current Balun 5kw Teflon #4115.
|
LA2RRA
|
Rating: 5/5
|
Jan 14, 2012 18:11
|
Send this review to a friend
|
|
No more rfi !!!!
|
Time owned: 0 to 3 months
|
I have killed usb ports in my pc.But putting in ofc balun 4115 ontop my glassfiber mast at appx 12 meters no more problems. I also put in 1:1 balun at 6,7 meters down on my coax..superb.
I run easy 700w on this superb baluns :-) withouth any problems any more.
I realy recomand this baluns.
My home made carolina windom is 15,24 m x 25,30 m and 1 : 1 balun at 6,7 m down at coax.
Yes i know there are 1:1 isolation on top inside 4115 but i like to have dobble isolation.
Now im writing this rewiew i hear usa on my new windom...im very happy.
Lars M in Norway
|
|
VK4TUX
|
Rating: 5/5
|
Sep 26, 2011 05:43
|
Send this review to a friend
|
|
Excellent
|
Time owned: 6 to 12 months
|
I use one on a 41.5m (27.5/14m) ocf dipole for all of my HF activity. This balun leaves the others for dead, and really is in it's own league at the peak of possible performance.
The radiation current is in the antenna legs where it belongs, and not in the feedline, which provides optimum ocfd performance in my opinion and experience, having tried carolina style setups & variations etc..
Because the so-239 in mounted from within you need to be careful on the length of the plug collar as it may well seat on the plastic bottom before the core is seated properly and firm. I trimmed mine 1/8" with a cutoff wheel (angle grinder), and that worked out very well.
Wise to check the side lug connection (I crimp and solder wire to lugs) nuts are tight again before the antenna goes up as well, as these can be inadvertently loosened during antenna setup on the ground.
Adrian ... vk4tux
|
|
VE7ZN
|
Rating: 5/5
|
Mar 27, 2011 18:18
|
Send this review to a friend
|
|
Excellent Product
|
Time owned: 0 to 3 months
|
|
Good build quality, solid performance. Pretty much eliminated my RFI issues. Had used a combination of beads and toroid CM chokes but still had some problems on some bands, especially when QRO. Bob is a terrific guy to do business with and I highly recommend his company.
|
|
K4GNO
|
Rating: 5/5
|
Nov 16, 2010 09:00
|
Send this review to a friend
|
|
WONDERFUL PRODUCT
|
Time owned: 3 to 6 months
|
|
I RECENTLY PURCHASED THIS BALUN FOR AN OCF 130' ANTENNA---FIRST CLASS QUALITY AND THE ANTENNA WORKS LIKE A CHARM---RUNNING 600 WATTS I GET 5-9 REPORTS IN EUROPE---
|
|
K5BJM
|
Rating: 5/5
|
Nov 4, 2009 05:31
|
Send this review to a friend
|
|
GREAT BALUN
|
Time owned: 0 to 3 months
|
|
It is nice to see Quality Made in USA!! One of the best baluns I have ever seen or used!
|
|
WD9CMD
|
Rating: 5/5
|
May 25, 2009 12:07
|
Send this review to a friend
|
|
Excellent Product
|
Time owned: 3 to 6 months
|
I purchased this balun in the OCF version to give a try to an off center fed dipole. The results were better than expected. The balun is a very high quality product. Since I run an amplifier quite often, I wanted a balun that will take the high rf and live a long life. This balun is the ticket!! Bob is excellent to deal with and very fast shipping. A credit to amateur radio.
73's, David
|
|
W0BUW
|
Rating: 5/5
|
Feb 28, 2009 08:50
|
Send this review to a friend
|
|
Best torroid design to date.
|
Time owned: 0 to 3 months
|
I have been designing and using air baluns since 1949. I have been able to make air baluns, that function on all the ham bands with great success. There are many Balun designs for sale on the internet. I just purchased a model 4115T to be used at high power on my V Beam to Europe. The reason I previously stayed away from Torroid Baluns is the fact that they saturate at high power and degrade there use rapidly. Bob, KZ5R has designed a high power torroid balun that, because of the permability factor is an ideal core for our frequencies.I have conducted detailed tests on my dual scope and his balun is one of the best balanced I have tested to date.
The quality of this balun is perfect. The best hign power 4:1 current balun to date. Buy it with confidence.
Boyd, W0BUW
|
|
SV2BWM
|
Rating: 5/5
|
Dec 24, 2008 11:34
|
Send this review to a friend
|
|
Recommended!
|
Time owned: 6 to 12 months
|
|
I have this balun with a vertical mast 7.8m and some ground radials. This antenna tunes very easy from 80m to 6m with the help of LDG-1000. Reports are very good for such a simple antenna...
|
|
WC4R
|
Rating: 5/5
|
Dec 22, 2008 09:32
|
Send this review to a friend
|
|
The best of the best
|
Time owned: 0 to 3 months
|
OMG!!! This balun is amazing. Perfect in every way.
I bought the eyelet version to replace my Radio Works burnt balun on my super loop. What a great upgrade. A week later I got the stud version when I built a 160m flat-top fed with ladder line.
Bob is fantastic to work with; fast email and telephone response. Quality on top of quality. No sealed up with epoxy unit here either. Bob designed it so you can take a look inside and inspect his workmanship. His web site shows honest interior pictures of the product build.
VERY reasonable price considering what you actually get. These products will really handle high power AND high SWR. THE BALUN for the real world. After 35 years I finally found a balun that will go on every one of my antennas.
|
|
W6IZT
|
Rating: 5/5
|
Dec 16, 2008 08:35
|
Send this review to a friend
|
|
A great product
|
Time owned: 0 to 3 months
|
I purchased this balun to use with a Nye Viking MB-V-A tuner. I was experiencing noticable current imbalance with the internal 1:1 balun. I normally wind my own baluns but I thought that I would give this one a try.
I am very impressed with the overall quality of the balun. With this balun I am not longer seeing a current imbalance.
Well worth the price
Gregg
W6IZT
|
|
If you have any questions, problems, or suggestions about Reviews,
please email your Reviews Manager.
|
|
|
|
|
