$14.95
Get Fast, Free Shipping with Amazon Prime & FREE Returns
Return this item for free
  • Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
  • Learn more about free returns.
FREE delivery Friday, May 27 if you spend $25 on items shipped by Amazon
Or fastest delivery Tuesday, May 24. Order within 18 hrs 37 mins
In Stock.
[{"displayPrice":"$14.95","priceAmount":14.95,"currencySymbol":"$","integerValue":"14","decimalSeparator":".","fractionalValue":"95","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"GEYRdLNlu3GPWnzYQdUNeF9BEmld5mHswQOxaei6BgsIN2%2BdUpAsf%2Fv19yx21lQteqskqldYY2BxmGU27tF1u8Ro8p%2FOf9eK9jHk3aEON2KO7Si4PhOmp1c4XQilLxe0%2B1cuH%2B%2FvlhedPk9qLdS77L0UaQePfYAt8yZBmRAD041yHxbiOtoh5w%3D%3D","locale":"en-US","buyingOptionType":"NEW"}]
$$14.95 () Includes selected options. Includes initial monthly payment and selected options. Details
Price
Subtotal
$$14.95
Subtotal
Initial payment breakdown
Shipping cost, delivery date, and order total (including tax) shown at checkout.
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Ships from
Amazon
Sold by
Ships from
Amazon
Sold by
Return policy: Eligible for Return, Refund or Replacement within 30 days of receipt
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Balun One Nine v1 - Tiny ... has been added to your Cart
Other Sellers on Amazon
Added
$14.95
+ $3.00 shipping
Sold by: Nooelec
Sold by: Nooelec
(8464 ratings)
99% positive over last 12 months
In Stock.
Shipping rates and Return policy
Have one to sell?

Balun One Nine v1 - Tiny Low-Cost 1:9 HF Antenna Balun and Unun with Antenna Input Protection for Ham It Up, RTL-SDR, HackRF and Other HF-Capable Radios. Great for DIY Dipole and Longwire Antennas

4.5 out of 5 stars 537 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Radio Antennas by NooElec

$14.95
Get Fast, Free Shipping with Amazon Prime
& FREE Returns
Return this item for free
  • Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
  • Learn more about free returns.

Enhance your purchase

    This fits your .
  • Make sure this fits by entering your model number.
  • 1:9 HF antenna balun for long wire antennas; includes excellent ESD protection on input
  • Great match for attaching a long wire to the Ham It Up
  • Fully assembled, and easy to use
  • Excellent specifications
  • Only 39.2mm x 13.0mm and 5g!
New (2) from $14.95 FREE Shipping on orders over $25.00 shipped by Amazon.

Buy it with

  • Balun One Nine v1 - Tiny Low-Cost 1:9 HF Antenna Balun and Unun with Antenna Input Protection for Ham It Up, RTL-SDR, HackRF
  • +
  • Ham It Up Plus - HF/MF/LF/VLF/ULF Upconverter w/TCXO
  • +
  • SMA Adapter Connectivity Kit: 8 Adapters for NESDR (RTL-SDR) SMA Radios w/ Case
Total price:
To see our price, add these items to your cart.
These items are shipped from and sold by different sellers.
Choose items to buy together.

Compare with similar items


Balun One Nine v1 - Tiny Low-Cost 1:9 HF Antenna Balun and Unun with Antenna Input Protection for Ham It Up, RTL-SDR, HackRF and Other HF-Capable Radios. Great for DIY Dipole and Longwire Antennas
Balun One Nine v2 Barebones - Small Low-Cost 9:1 (1:9) HF Antenna Balun and Unun with Antenna Input Protection for Shortwave. Great for Software Defined Radio (RTL-SDR), Ham It Up & SDRPlay
All-New 1.10b 50KHz-2000MHz 2GHz Malahit DSP SDR Receiver Malachite MDR2000 Registered HAM Nice Sound with 3.5 Inch Touching LCD Screen Spectrum Analyzer
Lana HF Barebones - Ultra Low-Noise LF, MF & HF Amplifier (LNA) Module for RF & Software Defined Radio (SDR). Wideband 50kHz-150MHz Frequency Capability with Bias Tee & USB Power Options
Nooelec HackRF Complete Bundle - Genuine HackRF One Software Defined Radio (SDR) with 0.5PPM TCXO in a Custom Black Aluminum Enclosure. ANT500 Antenna & SMA Antenna Adapter Bundle Included
Matching Transformer, Ancable 3-Pack Gold Plated - 75 Ohm to 300 Ohm Adapter - UHF/VHF/FM Balun Antenne Transformer Converter Adapters with F Female Jack for TV, Radio, Coax Antenna
Customer Rating 4.5 out of 5 stars (537) 4.5 out of 5 stars (104) 4.5 out of 5 stars (27) 4.3 out of 5 stars (50) 4.2 out of 5 stars (25) 4.5 out of 5 stars (993)
Price $14.95 $19.95 $280.00 $29.95 $369.95 $6.99
Shipping FREE Shipping on orders over $25.00 shipped by Amazon or get Fast, Free Shipping with Amazon Prime FREE Shipping on orders over $25.00 shipped by Amazon or get Fast, Free Shipping with Amazon Prime FREE Shipping. Details FREE Shipping. Details FREE Shipping. Details FREE Shipping on orders over $25.00 shipped by Amazon or get Fast, Free Shipping with Amazon Prime
Sold By Nooelec Nooelec Watson Electronic Nooelec Nooelec Ancable Direct
Are batteries included? No No Yes No No No
Item Dimensions 1.57 x 0.39 x 0.39 inches 1.97 x 0.79 x 0.39 inches 3.94 x 2.76 x 0.98 inches 2.76 x 0.79 x 0.39 inches 7.48 x 4.33 x 1.18 inches 4.4 x 0.48 x 0.48 inches
Item Weight 0.21 ounces 0.25 ounces 6.35 ounces 0.53 ounces 0.73 lbs 0.71 ounces

Customer Questions & Answers

Have a question?

Find answers in product info, Q&As, reviews

There was a problem completing your request. Please try your search again later.
All Product Information Customer Q&A's Customer Reviews

Your question might be answered by sellers, manufacturers, or customers who bought this product.

Please make sure that you are posting in the form of a question.

Please enter a question.

Product information

Warranty & Support

Product Warranty: For warranty information about this product, please click here

Feedback

Would you like to tell us about a lower price?

Product Description

Meet 'Balun One Nine', a small, cost-effective balun. An excellent way to attach a long wire antenna to the Ham It Up, this 1:9 balun has an SMA output port and high-quality spring-type terminal block input for your coax.

Balun One Nine includes an AntennaGuard varistor on the input, protecting your SDR setup from spurious ESD. The ESD protection is excellent--it passes IEC61000-4-2, an 8kV contact discharge test, with a response time of just 300ps.

At 39.2mm x 13.0mm in total size (including connectors!) this balun was designed to be light in weight and light on your wallet.

Very low insertion loss of -1.3dB (typical), with a maximum input power of 28dBm. Designed for HF applications, but specifications are accurate to frequencies up to 90MHz .

Customer reviews

4.5 out of 5 stars
4.5 out of 5
537 global ratings

Top reviews from the United States

Reviewed in the United States on December 22, 2015
Customer image
4.0 out of 5 stars One side to wire, one side to ground. Which one?
Reviewed in the United States on December 22, 2015
Interesting piece of hardware for using a random-length wire with an SDR-RTL but there's more to this.

First, this is not, technically, a BALUN (BALanced-UNbalanced line transformer), but a UNUN (UNbalanced-UNbalanced line transformer)

The picture I've added shows a standard circuit diagram for a 9:1 UNUN. You'll notice a couple things about this. First, how SMALL the NooElec unit is. Second, one side - the UNbalanced side - has twice as much impedence as the side to ground. This makes a difference. Your VSWR is lower when wired right (I tested it with a SARK 110 vector analyzer, a "random" 36 foot piece of 22 gauge jumper wire - see the other two pictures attached, the one marked CSV_001 is wired correctly, CSV_000 is wrong). While the differences are small in my example, other wire lengths at other frequencies can make a HUGE difference. The side with the paperclip goes to ground.

You can test this out yourself if you look at the circuit diagram. One connector shorts directly to ground. The other side has some impedence. I measured - roughly - 5 Ohms with a Fluke 118B digital multimeter).

From Balun designs dot com:

How long a wire to use? While you CAN use a "random wire", 100 years or so of Hams experimenting and calculating have figured this out for you - it's settled science although things like height of the wire above ground and its proximity to telephone wires or home wiring will alter VSWR too so your lengths may need to be a little different. The effects on receive may be marginal on some frequencies depending on your wire length but can make a huge difference on others; transmitting with very high VSWR can be impossible or damage the transmitter, but, since we're not using this particular UNUN for a transmitter, this is FYI only.

Balun Design dot com has a link to a wire length chart you may find useful (fourth picture):

http://www.balundesigns.com/content/Wire%20Lengths%20for%204%20and%209-1%20ununs.pdf

"unun should be used with the wire lengths listed in the table shown in the above link. Use of the 9132 for "random" wire lengths, other than shown, can potentially create an impedance that is too high for an ATU to match. If a wire length not shown in the table is installed, an antenna analyzer should used to determine the actual feedpoint impedance that will require matching for each band of operation."

"Ununs are intended for use with unbalanced antennas such as verticals and long wires. They will not work with balanced designs such as dipoles or loops and use with a balanced antenna may cause erratic operation and/or damage to the unit."

One side to wire, one side to ground.

Hope this helps.
Images in this review
Customer image Customer image Customer image Customer image
Customer imageCustomer imageCustomer imageCustomer image
155 people found this helpful
Report abuse
Reviewed in the United States on August 21, 2019
21 people found this helpful
Report abuse
Reviewed in the United States on July 21, 2017
Customer image
5.0 out of 5 stars Since some other reviewers said this was actually an Unun ...
Reviewed in the United States on July 21, 2017
Since some other reviewers said this was actually an Unun I took a very close look at it. It is a Balun as it is described and as documented in the schematic on the companies website. Since I was using this on a long wire antenna I did the following: I cut the trace on the bottom of the circuit board which connects the center tap of the antenna side of the transformer to the ground on the sma connector. I then inserted and soldered a wire through the hole next to where Max +28 dBm is printed. This wire was connected to the ground wire which was also connected to one of the antenna inputs and the long wire was connected to the other.
Images in this review
Customer image
Customer image
50 people found this helpful
Report abuse
Reviewed in the United States on March 16, 2020
11 people found this helpful
Report abuse
Reviewed in the United States on August 27, 2017
20 people found this helpful
Report abuse
Reviewed in the United States on February 14, 2018
15 people found this helpful
Report abuse
Reviewed in the United States on January 18, 2019
6 people found this helpful
Report abuse
Reviewed in the United States on July 5, 2019
Customer image
5.0 out of 5 stars Well Designed and Works Perfectly
Reviewed in the United States on July 5, 2019
Well made and perfect for making a custom antenna. I replaced the off-the-shelf antenna for my ADS-B receiver with a custom antenna I made from copper rods and this matching transformer. The result was more than I could have hoped for. My system went from receiving 1,500 position messages per day to over 80,000! A 50X improvement. It increased reception range from less than 80km to over 400km.
Images in this review
Customer image
Customer image
5 people found this helpful
Report abuse

Top reviews from other countries

Mike
4.0 out of 5 stars This is a Balun NOT an Unun
Reviewed in the United Kingdom on December 19, 2016
Customer image
Mike
4.0 out of 5 stars This is a Balun NOT an Unun
Reviewed in the United Kingdom on December 19, 2016
It does what is says, but beware it is a BALUN not an UNUN and therefore not really the best device to be using for a random end fed wire antenna.
The High Z side of the transformer is a centre-tapped transformer for coupling to a balanced load such as a dipole or loop antenna. If you know what you're doing the earth (ground) connection (pin 2) can be isolated from the centre tap by cutting the small pcb link on the bottom of the unit and then connect one side of the transformer input to ground and the other to the wire antenna.
Images in this review
Customer image
Customer image
32 people found this helpful
Report abuse
diddy
4.0 out of 5 stars NooElec Balun One Nine - works very well with SDR Play RSP1A
Reviewed in the United Kingdom on April 12, 2021
HowardT
5.0 out of 5 stars Indoor Balun
Reviewed in the United Kingdom on January 31, 2019
5 people found this helpful
Report abuse
Soundworker
5.0 out of 5 stars Das Teil tut genau das was es soll...HF-Spannung im Verhältnis 9:1 transformieren.
Reviewed in Germany on May 5, 2019
Customer image
Soundworker
5.0 out of 5 stars Das Teil tut genau das was es soll...HF-Spannung im Verhältnis 9:1 transformieren.
Reviewed in Germany on May 5, 2019
"Balun" ist das Kunstwort aus "BALanced-UNbalanced" und kennzeichnet Transformationsstufen, welche symmetrische Leitungen (z.B. UKW-Flachbandkabel) auf unsymmetrisch (z.B. RG58-Koaxialkabel) anpassen sollen oder auch den symmetrischen Ausgang einer Loop-Antenne an unsymmetrisches Koax.
Wenn man anfängt, einem ursprünglichen Balanced-Signal "Ground", also Erde hinzufügen zu wollen, dann verschiebt man die komplette Philosophie einer symmetrischen Speisung in Richtung Rauschen. Wenn man aber einen Langdraht benutzt, macht das Teil schon Sinn, mit dem Anklemmen einer Erde muss man experimentieren. Bei einem separaten Staberder mag es noch angehen, schliesse ich aber eine Erde aus dem häuslichen Bereich (Metallrohre, wie Wasser oder Heizung) an, dann ziehe ich mir UNWEIGERLICH den häuslichen EMV-Störnebel in den Empfänger und der Rauschflur wird unangenehm.
Selber bin ich komplett weg von unsymmetrischen Systemen und benutze nur noch eine 70 cm-Loop für AM von Mittelwelle bis hoch zu 30 MHz, die geht mit einer symmetrischen Leitung (DSL-Rangierdraht) vom Speisepunkt bis direkt an den SDR-Eingang. Damit höre ich in Samao, Fiji und Papua-Neuguinea das Gras wachsen.

Tip für alle Langdraht-Fans:
Einfach zwei Drähte (max. 8 Meter lang) jeweils an die Balun-Klemmen dran, gerade nach Links und rechts gespannt, evtl. auch im Rechten Winkel je nach Platz, am Ausgang des Balun ein Koax dran und nach evtl. Filtern rein in den SDR-Eingang. Der Empfang ist erdfrei und zehnmal rauschärmer als "irgendwie eine Erde" dazu zu klemmen. An eine Loop kommen allerdings Langdrähte nie ran, weil sie die E-Komponente des elektromagnetischen Feldes empfangen, und damit die EMV-Störungen, die auch meist das E-Feld verseuchen. Eine Loop empfängt nur das H-Feld, und dort ist der Rauschflur extrem gering, weil die Störungen des häuslichen Nebels kaum das H-Feld beeinträchtigen.
Images in this review
Customer image
Customer image
24 people found this helpful
Report abuse
Tiberius
5.0 out of 5 stars Made a dipole for 40m band
Reviewed in the United Kingdom on April 7, 2020