Quick Answer
For most 5-inch freestyle and racing builds under £30, we recommend a diversity ELRS receiver like the RadioMaster RP4TD. For micro whoops and toothpicks, the Radiomaster RP1 V2 or Happymodel EP1 are smaller, lighter, and perfectly adequate. The key factor is whether your build benefits from two antennas (diversity) or can get by with one.
Single Antenna vs Diversity: The Choice That Actually Matters
Every ELRS receiver receives on 2.4GHz. The split that matters is single-antenna vs true diversity with two independent RF paths. We learned this after a customer's 5-inch quad kept dropping link at 400m. The single-antenna EP1 was mounted flat against a carbon plate. We swapped in an RP4TD with antennas at 90 degrees, and the same build held solid past 1.2km.
Diversity works because 2.4GHz signals bounce off objects and arrive from different angles. Two antennas let the receiver pick the stronger signal on every packet, meaning fewer failsafes behind trees and at range.
Our ELRS Receiver Picks by Build Type
Micro whoops and 65-85mm builds: The Happymodel EP1 weighs under 1g with a tiny IPEX connector. For indoor whooping and park flying at 50-250mW, it is the go-to. We sell more EP1s than any other ELRS receiver because it fits everything. The Radiomaster RP1 V2 offers a U.FL connector option, which we prefer when the antenna might get tugged.
3-5 inch freestyle and racing: This is where diversity pays off. The RadioMaster RP4TD goes on roughly eight out of ten 5-inch builds we ship. Two full RF paths, 1000Hz packet rate support, and it handles the 1W output from modules like the BetaFPV ELRS Micro TX Module. For tighter builds, the RP4TD-M offers the same diversity in a smaller footprint. Browse our full radio receivers range for all options.
Long range and survey builds: When flying kilometres from home, the BetaFPV SuperP gives 14 channels and diversity reception, suiting ArduPilot builds needing more PWM outputs alongside ELRS control.
Common Mistakes We See with ELRS Receivers
Mistake 1: Mounting the antenna against carbon fibre. Carbon blocks 2.4GHz. If your antenna is flat against a plate, you are flying with half your range. We route antennas at 90 degrees to the nearest carbon surface, and we use heatshrink or antenna tubes to keep them there.
Mistake 2: Running diversity antennas parallel. Two antennas pointing the same direction defeats the point of diversity. Mount them at 90 degrees to each other: one vertical, one horizontal, or one at 45 degrees. This gives the receiver two polarisation options on every packet.
Mistake 3: Overpowering tiny receivers. Pushing 1W TX power with the receiver next to a 5.8GHz VTX antenna causes desense: the ELRS front end gets overloaded by harmonics. Keep at least 20mm between ELRS and VTX antennas. See our antenna placement guide for the full breakdown.
Connector Types: U.FL vs IPEX vs Direct
Most nano receivers use IPEX (MHF4) connectors. Tiny, light, and fragile. One sharp tug and the connector pops off. U.FL connectors are slightly larger but far more robust. For any build over 2 inches, we reach for U.FL. If your receiver offers pad soldering (like the RP1 V2), solder the coax directly. It eliminates the weakest link in your RF chain.
FAQ
Q: Do I need a diversity receiver for a whoop?
A: Generally no. Whoops fly close range indoors or at parks. A single-antenna receiver like the EP1 or RP1 V2 is lighter, smaller, and gives you all the range you need at 100mW TX power. Save the diversity receivers for builds that fly beyond 500m.
Q: Can I mix ELRS receiver brands with my TX module?
A: Yes. ELRS is an open-source protocol. A Happymodel EP1 works with a RadioMaster TX module, a BetaFPV module, or any other ELRS transmitter. Just make sure both TX and RX are running compatible firmware versions. We cover the full binding process in our ELRS receiver binding guide.
Q: What packet rate should I run?
A: For freestyle and racing, 500Hz is the sweet spot. It gives low latency without excessive RF noise. For long range, drop to 50Hz or 150Hz to extend range. Pushing 1000Hz is possible on receivers like the RP4TD, but it demands more from your link budget and offers diminishing returns for most pilots.
Q: Is there a UK legal power limit for ELRS?
A: In the UK, 2.4GHz licence-exempt use is limited to 100mW (20dBm) EIRP under Ofcom IR2030. In practice, most UK pilots run 250mW or 500mW at flying fields with no issues, but technically exceeding 100mW requires coordination. If you fly at a BMFA-affiliated club, check with your site safety officer. For indoor whoops, 25-50mW is plenty and well within the legal limit.