---
product_id: 158834538
title: "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"
brand: "nooelec"
price: "36480CFA"
currency: XOF
in_stock: true
reviews_count: 9
category: "Noo Elec"
url: https://www.desertcart.sn/products/158834538-balun-one-nine-v2-barebones-small-low-cost-9-1
store_origin: SN
region: Senegal
---

# 8kV ESD protection, 300ps response Compact 38x25mm size 9:1 impedance transformation 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

**Brand:** nooelec
**Price:** 36480CFA
**Availability:** ✅ In Stock

## Summary

> 📡 Elevate your SDR game with the ultimate compact HF balun!

## Quick Answers

- **What is this?** 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 by nooelec
- **How much does it cost?** 36480CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/158834538-balun-one-nine-v2-barebones-small-low-cost-9-1)

## Best For

- nooelec enthusiasts

## Why This Product

- Trusted nooelec brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Robust ESD Shielding:** Protect your valuable gear with top-tier 8kV antenna input protection.
- • **Ultra-Compact Design:** Fits seamlessly into any SDR setup without bulk.
- • **Enhanced HF Performance:** Lower insertion loss and expanded frequency range down to HF bands.
- • **Versatile Terminal Blocks:** Three adapters included for flexible antenna wire configurations.
- • **North American Quality & Warranty:** Crafted with care and backed by a full 1-year warranty.

## Overview

The NooElec Balun One Nine v2 is a precision-engineered 9:1 HF antenna balun/unun designed for long wire and dipole antennas, delivering superior low-frequency performance and minimal signal loss. Featuring robust 8kV ESD protection and multiple terminal block adapters, it ensures versatile, reliable connections for SDR, Ham It Up, and SDRPlay users. Compact, lightweight, and made in North America with a 1-year warranty, it’s the smart choice for serious shortwave enthusiasts.

## Description

For more details, please see the product page at nooelec.com! Balun One Nine v2 is a very small 9:1 balun/unun meant for attaching long wire and dipole HF antennas to your HF capable SDR, radio or Ham It Up upconverter. It has an SMA output port and 3 different terminal block input options (all included) for your antenna 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 38mm x 25.0mm in total size, this balun is a bit larger than our popular Balun One Nine v1, but also has better HF performance and can be used to even lower frequencies. It was designed to be light in weight and light on your wallet. Very low insertion loss with a maximum input power of +24dBm. Designed primarily for HF amateur bands, but specifications are accurate to frequencies up to 80MHz+.

Review: Remember to cut the track if you want an unun! - That's the headline. Make sure you use it in the right configuration. For a random wire antenna you want to aim for a 450 Ohm resistance at your chosen frequency dips, so that it transforms down to 50 Ohm. Don't use a half-wave at a chosen frequency! I am not sure why a 9:1 would be useful as a balun, as a loop would be more 4:1, but if you don't cut the track underneath it stays in a balun configuration. You can also transmit through these, not very much, but you can. 0.25W is the rated maximum for the transformer on the PCB, which is enough for WSPR. I managed to get out quite far with this, but definitely don't push it too high and keep your volume levels down to get the desired power.
Review: Very good 1:9 balun - Well made and works well. Would prefer a thicker PCB to be used, as this one is quite thin and flexes.

## Features

- Balun One Nine is a very small 9:1 HF antenna balun for long wire and dipole antennas
- Improved performance over the smaller and lighter Balun One Nine v1, including lower insertion loss and expanded lower frequency limit
- Includes 3 different terminal block adapters for various wire configurations and diameters
- Excellent ESD protection on the antenna input
- Made in North America. Full 1 year warranty!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07XJRTF94 |
| Are Batteries Included | No |
| Best Sellers Rank | 98,789 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 362 in Radio Antennas |
| Brand | NooElec |
| Colour | Green |
| Customer Reviews | 4.3 4.3 out of 5 stars (161) |
| Date First Available | 10 Sept. 2019 |
| Guaranteed software updates until | unknown |
| Item Weight | 7 g |
| Item model number | Balun One Nine v2 |
| Manufacturer | Nooelec Inc. |
| Product Dimensions | 5 x 2 x 1 cm; 7 g |
| Tuner Technology | Shortwave |
| Voltage | 5 Volts |

## Product Details

- **Antenna:** Radio
- **Brand:** NooElec
- **Colour:** Green
- **Impedance:** 50 Ohms
- **Manufacturer:** Nooelec Inc.
- **Number of items:** 1
- **UPC:** 616469146588

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/71vZZHdKl6L.jpg)

## Questions & Answers

**Q: Is this a balun or an unun? i want to use a loop on ground antenna.**
A: According to the RTl-SDR website-"While it is a balun and hence designed for balanced antennas like a dipole, it is possible to convert it into an unun for long wire antennas by cutting a trace."
Information for this will probably to be found somewhere on the aforementioned website.

**Q: Does it go nr the antenna or the radio ?..thanks**
A: You connect your antenna and earth as close as possible to the balun then connect it directly to the radio if possible.  If not, run a length of 50ohm co-axial cable with sma plugs at both ends between the two.

**Q: Please can anyone tell me what connection you need to connect it to sdrplay rsp1a thankyou for your help**
A: Both the balun and the rsp1a have female sma connections. You need a male/male sma adapter {about 25 mm long)  to directly connect or, a length of 50 ohm co-axial cable with an sma male plug at both ends.  The balun and rsp1a work very well together.

**Q: Where is the case that goes with this balun 9:1 ?**
A: As far as I know, they have not made a case for the balun 9:1 v2 although, there was some talk of one a year or so ago.  Unless the unit is placed close to a noise sauce, a screening case is not really necessary.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Remember to cut the track if you want an unun!
*by A***R on 17 April 2022*

That's the headline. Make sure you use it in the right configuration. For a random wire antenna you want to aim for a 450 Ohm resistance at your chosen frequency dips, so that it transforms down to 50 Ohm. Don't use a half-wave at a chosen frequency! I am not sure why a 9:1 would be useful as a balun, as a loop would be more 4:1, but if you don't cut the track underneath it stays in a balun configuration. You can also transmit through these, not very much, but you can. 0.25W is the rated maximum for the transformer on the PCB, which is enough for WSPR. I managed to get out quite far with this, but definitely don't push it too high and keep your volume levels down to get the desired power.

### ⭐⭐⭐⭐⭐ Very good 1:9 balun
*by Z***0 on 8 December 2020*

Well made and works well. Would prefer a thicker PCB to be used, as this one is quite thin and flexes.

### ⭐⭐⭐⭐ 9:1 (1:9) HF Antenna Balun
*by M***N on 14 November 2025*

Had this a while now and this 9:1 balun works ok, I would not say it is a five star item, but it does work as expected and I use it on a wire antenna.

## Frequently Bought Together

- 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
- 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
- Superbat RF coaxial SMA Male to SMA Female Bulkhead RG174 6.56ft Cable + 3pcs RF Coax SMA Adapter Kit for SDR Equipment Antenna Ham Radio,3G 4G LTE Antenna,ADS-B,GPS and etc

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-02-02*