Key Features
- Case design offers better strain relief on antenna lead
- DSMX with DSM2 Backward compatibility*
- 22ms and 11ms Compatible
- Upgrade for any Spektrum receiver with available remote receiver ports
- Great addition to AR636, AR7350, AR9350, Telemetry Receivers and PowerSafe receivers
- Includes 24 inch extension
Overview
The next generation of Spektrum remote receivers are here with the SPM9745 and SPM9746 Receivers. Featuring a user friendly antenna setup that allows for the antenna to be placed in 2 positions, making installation into those tight projects easier than ever. Fully compatible with DSMX and DSM2 Transmitters*. Use these to add more receiving points on any Spektrum receiver that has 1 or more Remote receiver ports.
The remote receiver includes one 24-inch extension; however, various lengths of receiver extensions can be purchased allowing various placement options for mounting purposes. Additional remote receiver extensions are available in 6", 9", 12", 24" and 36" lengths.
*DSMX Remote Receivers must be used with a DSMX Main Receiver.
Overview
The Spektrum SPM9745 DSMX Remote Receiver is a cutting-edge addition to the Spektrum radio system family, designed specifically for RC aircraft enthusiasts who demand reliable, long-range control and exceptional signal stability. This advanced remote receiver utilises Spektrum's patented MultiLink technology to provide additional path diversity, effectively avoiding reflected signal fading and polarisation blind spots that can occur at extended range from your transmitter. Whether you're flying fixed-wing aircraft, drones, or other aerial RC platforms, this remote receiver represents a significant upgrade in control reliability and performance for your Spektrum-equipped model.
The SPM9745 is fully compatible with DSMX and DSM2 transmitters, making it an excellent choice for upgrading any existing Spektrum receiver that features available remote receiver ports. This includes popular receivers such as the AR636, AR7350, AR9350, and various telemetry and PowerSafe receivers. The remote receiver is engineered to expand your aircraft's receiving points, creating a more robust and redundant control system that delivers consistent performance even in challenging RF environments. For UK RC pilots looking to enhance their aerial control systems, this Spektrum remote receiver offers professional-grade reliability at an accessible price point.
What sets the SPM9745 apart from older remote receiver designs is its innovative repositionable antenna system. Unlike traditional fixed-wire antenna designs that can be fragile and difficult to route through tight spaces, the SPM9745 features a user-friendly antenna setup that allows you to position the antenna in multiple locations, exiting the case from either the side or the top. This flexibility makes installation into even the most compact RC aircraft projects significantly easier than ever before.
Key Features
- Repositionable Antenna Design — The antenna can exit the receiver case from either the side or top position, allowing you to customise installation to suit your specific aircraft layout. This flexibility is crucial when working with tight fuselages or confined spaces where traditional fixed antennas simply won't fit. The antenna design also offers added strain relief to the antenna wire, protecting against damage during installation and flight.
- DSMX and DSM2 Compatibility — This remote receiver works seamlessly with both DSMX and DSM2 transmitters, providing backward compatibility with existing Spektrum radio systems. This means you can upgrade your current receiver without needing to purchase a new transmitter, making this an economical choice for existing Spektrum users. Please note that DSMX remote receivers must be paired with a DSMX main receiver for full compatibility.
- 22ms and 11ms Frame Rate Support — The SPM9745 supports both standard and high-speed frame rates, offering flexibility depending on your specific aircraft requirements and control system configuration. This compatibility ensures smooth, responsive control regardless of your transmitter settings.
- MultiLink Path Diversity Technology — Spektrum's patented MultiLink technology enables the remote receiver to utilise multiple signal paths simultaneously, dramatically reducing the likelihood of signal loss due to reflections or polarisation issues. This technology is particularly valuable when flying at longer ranges or in environments with potential RF interference.
- Integrated Telemetry Support — The SPM9745 supports integrated telemetry when used with compatible main receivers and flight controllers, allowing you to monitor vital aircraft parameters in real-time from your transmitter. This adds an extra layer of safety and awareness during flight operations.
- Extended Installation Options — The package includes a 24-inch extension cable, and additional remote receiver extensions are available separately in 6-inch, 9-inch, 12-inch, 24-inch, and 36-inch lengths. This comprehensive range of options ensures you can position your remote receiver exactly where you need it for optimal signal reception, regardless of your aircraft's configuration.
- Lightweight and Compact Form Factor — At just 3 grams (0.1oz), the SPM9745 adds minimal weight to your aircraft, preserving flight characteristics and battery endurance. The compact dimensions of just 25.4mm length, 18.11mm width, and 7.52mm height make it easy to fit into even the most space-constrained installations.
- Upgrade Path for Existing Receivers — If you already own a Spektrum receiver with remote receiver ports, the SPM9745 provides an affordable way to add redundancy and enhance signal reception without requiring a complete system replacement. This makes it an excellent choice for competitive flyers or those seeking to improve their existing setups.
Technical Performance
The Spektrum SPM9745 operates on the 2.4GHz frequency band, the same standard used by all modern Spektrum DSMX and DSM2 systems, ensuring compatibility with your existing RC radio equipment. The receiver features robust engineering with an input voltage range of 3.3 to 8.4 volts, making it compatible with a wide variety of power sources commonly found in RC aircraft, from LiPo batteries to traditional NiMH packs. The receiver includes automatic failsafe functionality, a critical safety feature that ensures your aircraft enters a safe state (typically returning to neutral throttle and returning to home if equipped with autopilot) should the radio link be lost for any reason. The SRXL2 serial output protocol enables bi-directional communication with compatible flight controllers and Smart ESCs, providing superior data transfer speeds, enhanced security, and richer telemetry options compared to older protocols. This advanced communication standard allows for customised, responsive telemetry that can be precisely tailored to your specific flying needs and equipment configuration. The remote receiver's integrated antenna design eliminates the need for external wire antennas that could be damaged during handling or installation, whilst maintaining full performance across the complete control range. With its lightweight construction and compact footprint, the SPM9745 represents the modern standard in remote receiver design for serious RC aircraft pilots in the UK and beyond.
What's in the Box
- SPM9745 DSMX Remote Receiver unit
- 24-inch extension cable for receiver connection
- Instruction manual (available in English, German, French, and Italian)
What You Need to Complete
- A compatible Spektrum main receiver with available remote receiver ports (such as AR636, AR7350, AR9350, or compatible telemetry/PowerSafe receivers)
- A DSMX or DSM2 Spektrum transmitter
- Battery pack (3.3V to 8.4V input voltage compatible, such as LiPo or NiMH)
- Optional: Additional receiver extension cables in alternative lengths (6-inch, 9-inch, 12-inch, or 36-inch) if the included 24-inch cable doesn't suit your installation
Frequently Asked Questions
- What is a remote receiver and why do I need the SPM9745? — A remote receiver is a secondary antenna system that connects to your main Spektrum receiver, providing additional signal reception points in your aircraft. The SPM9745 uses MultiLink path diversity technology to reduce signal fading and dead zones, particularly at extended range. This is especially valuable for competitive flying, long-distance missions, or flying in RF-challenging environments. If you're currently experiencing occasional signal glitches or want maximum reliability, a remote receiver like the SPM9745 is an essential upgrade.
- Is the SPM9745 compatible with my existing Spektrum receiver? — The SPM9745 is compatible with Spektrum receivers that feature available remote receiver ports, including popular models like the AR636, AR7350, AR9350, and various telemetry and PowerSafe receivers. However, it is not compatible with receivers that use 3-wire remote receiver connectors—your main receiver must specifically support 4-wire SRXL2 remote receivers. Check your main receiver's specifications to confirm compatibility before purchasing.
- Can I use the SPM9745 with both DSMX and DSM2 transmitters? — Yes, the SPM9745 is fully backward compatible with both DSMX and DSM2 transmitters. This makes it an excellent upgrade option for pilots with existing Spektrum systems. However, if you're using a DSMX remote receiver, your main receiver must also be DSMX-capable to ensure full compatibility and proper operation.
- How difficult is it to install the SPM9745 in my aircraft? — Installation is straightforward thanks to the repositionable antenna design. Simply connect the receiver to your main receiver's remote receiver port using the supplied extension cable, and position the antenna to exit from either the side or top of your fuselage. The integrated antenna design eliminates worries about damaging fragile wire antennas during installation, and the flexible positioning makes it easier to fit into tight spaces compared to traditional fixed-antenna remote receivers.
- What voltage does the SPM9745 require? — The SPM9745 accepts input voltage between 3.3 and 8.4 volts, making it compatible with most battery systems used in RC aircraft. This includes standard 1S to 2S LiPo packs, traditional NiMH batteries, and regulated power sources from your flight controller or main receiver.
- Does the SPM9745 provide telemetry? — The SPM9745 itself is a receiver-only component and does not generate telemetry data. However, when used with a compatible SRXL2-equipped main receiver and flight controller, it supports integrated telemetry functionality through its bi-directional SRXL2 serial output, allowing you to monitor aircraft systems from your transmitter.
- What's the difference between the SPM9745 and older remote receiver models? — The SPM9745 features Spektrum's latest antenna design with repositionable options, allowing the antenna to exit from the side or top of the case. This is a significant improvement over older fixed-antenna designs, as it makes installation much easier in confined spaces and offers better strain relief to protect the antenna wire. Additionally, the SPM9745 integrates latest MultiLink technology for superior path diversity and signal stability.
- How long is the included extension cable? — The SPM9745 includes a 24-inch extension cable, providing substantial reach for positioning the remote receiver away from your main receiver. If you need a different length, Spektrum offers optional extensions in 6-inch, 9-inch, 12-inch, and 36-inch lengths to suit various aircraft configurations.
- Will the SPM9745 significantly improve my signal range? — The SPM9745 doesn't extend your absolute maximum range beyond your transmitter's capabilities, but it dramatically improves signal reliability across your entire control range by eliminating dead spots and reducing fading caused by signal reflections and polarisation issues. This means more consistent, responsive control throughout your flight envelope, particularly valuable in challenging RF environments or when flying at extended distances.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the SPM DSMX Remote Receiver P-SPM9745 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
