---
product_id: 10620103
title: "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"
brand: "nooelec"
price: "€ 28.21"
currency: EUR
in_stock: true
reviews_count: 13
category: "Noo Elec"
url: https://www.desertcart.de/products/10620103-balun-one-nine-v1-tiny-low-cost-1-9-hf
store_origin: DE
region: Germany
---

# 8kV ESD protection, 300ps response Compact 39.2x13.0mm size Low insertion loss -1.3dB, up to 90MHz 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

**Brand:** nooelec
**Price:** € 28.21
**Availability:** ✅ In Stock

## Summary

> 📡 Tiny balun, huge signal power — don’t get left off the airwaves!

## Quick Answers

- **What is this?** 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 by nooelec
- **How much does it cost?** € 28.21 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/10620103-balun-one-nine-v1-tiny-low-cost-1-9-hf)

## 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

- • **Ultra-Compact Design:** Fits seamlessly into any HF setup without bulk or weight.
- • **Plug & Play Convenience:** Fully assembled with SMA output and spring terminal input for effortless installation.
- • **Optimized Signal Integrity:** Experience minimal signal loss with a low -1.3dB insertion loss for crystal-clear reception.
- • **Versatile HF Compatibility:** Perfectly matched for Ham It Up, RTL-SDR, HackRF, and DIY long wire antennas.
- • **Industry-Leading ESD Protection:** Safeguard your valuable SDR gear with 8kV-rated AntennaGuard varistor.

## Overview

The Balun One Nine v1 is a compact, cost-effective 1:9 HF antenna balun designed for long wire antennas and HF-capable radios like Ham It Up and RTL-SDR. It features robust 8kV ESD protection with a lightning-fast 300ps response, low insertion loss of -1.3dB, and supports frequencies up to 90MHz. Fully assembled and lightweight at just 5g, it ensures easy integration and superior signal quality for amateur radio enthusiasts and SDR users.

## 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 .

Review: works great - nice balun i ised it when i started my ham radio hobby
Review: Great way to improve SW reception - This balun from Nooelec works perfectly with my long wire. I had a problem with noise coming down the coax from the house. Cutting the trace on the backside of the board lifted the center tap ground on the secondary and stopped the noise. I think I had current flowing to the ground rod which put noise into the received signal. I now have a true isolation transformer and better reception.

## Features

- 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!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00R09WHT6 |
| Best Sellers Rank | #196 in Computer Networking Antennas #336 in Radio Antennas |
| Customer Reviews | 4.5 4.5 out of 5 stars (724) |
| Date First Available | December 14, 2014 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.212 ounces |
| Item model number | Balun One Nine |
| Manufacturer | Nooelec Inc. |
| Product Dimensions | 1.57 x 0.39 x 0.39 inches |

## Product Details

- **Antenna:** Radio
- **Brand:** NooElec
- **Color:** Blue, Gold, Grey
- **Impedance:** 50 Ohms
- **Manufacturer:** Nooelec Inc.
- **Number of Channels:** 1
- **Number of Items:** 1
- **Product Dimensions:** 1.57"L x 0.39"W x 0.39"H
- **UPC:** 616469145796

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/81J9WqJs7gL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ works great
*by S***I on November 30, 2025*

nice balun i ised it when i started my ham radio hobby

### ⭐⭐⭐⭐⭐ Great way to improve SW reception
*by P***K on March 3, 2025*

This balun from Nooelec works perfectly with my long wire. I had a problem with noise coming down the coax from the house. Cutting the trace on the backside of the board lifted the center tap ground on the secondary and stopped the noise. I think I had current flowing to the ground rod which put noise into the received signal. I now have a true isolation transformer and better reception.

### ⭐⭐⭐⭐ One side to wire, one side to ground. Which one?
*by N***B 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.

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-02-21*