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Documented model specifications
FeaturePresident Randy III+ ↗RemoveNooelec NESDR SMArt v5 ↗Remove
Model
PurposePortable AM/FM CB radio with ASC automatic squelch.USB SDR covering 100 kHz–1750 MHz: Q-branch direct sampling for HF, a TCXO and an SMA antenna input.
Frequency ranges

Standard frequencies
26.965–27.405 MHz

Receive range
0.1–25 MHz direct (Q branch); 25–1750 MHz through tuner

Modes

Modes
AM / FM

Modes
Software-dependent demodulation; receive only

Transmit power

Carrier output
4 W AM / 4 W FM

Not documented — see detail page.
ConnectionsNot documented — see detail page.

Antenna connector
Female SMA, 50 Ω

Computer connection
USB Type A

Power supply

Portable / mobile supply
7.4 V / 13.2 V through designated mobile module

Battery
Li-Ion, 1800 mAh

Power supply
5 V via USB; typically 300 mA, 270–330 mA per datasheet

Dimensions and weight

Dimensions, W × H × D
66.5 × 152 × 37 mm

Weight
305 g with battery, without antenna

Dimensions, W × H × D
16.9 × 14.2 × 59.1 mm

Weight
34 g

Enclosure
Aluminium, internal heatsink

Protection and operating conditionsNot documented — see detail page.Not documented — see detail page.
Highlights
  • AM/FM and selectable country configurations.
  • ASC and manually adjustable squelch.
  • Scan, Dual Watch and priority-channel controls.
  • NRC, ANL/NB and Hi-Cut as documented in the Plus manual.
  • 100 kHz–25 MHz with Q-branch direct sampling; 25–1750 MHz through the tuner.
  • RTL2832U with R820T2/R860 tuner according to the current product description.
  • TCXO with a maximum frequency deviation of ±0.5 ppm.
  • Narrow aluminium enclosure with an internal heatsink and female SMA connector.
Variants and sourcesFull product dossier →

The owner confirmed the v5 version. According to Nooelec, a v5 marking underneath distinguishes it from older generations.

The datasheet’s electrical table places the direct-sampling/tuner crossover at 25 MHz. Its simplified block diagram uses inconsistent labels; the table values are used here. The specific tuner chip in this individual receiver has not been separately verified.

Maximum bandwidth is a manufacturer specification. The practical sample rate also depends on the computer and USB connection. An antenna bundle or upconverter is not assumed to be owned.

Full product dossier →

How to interpret the differences

BandwidthBandwidth is the width of a frequency range. A receiver filter limits the analysed range; the signal’s occupied bandwidth is a separate quantity.Example & full explanation →SDRIn a Software Defined Radio, software performs key signal-processing tasks such as filtering and demodulation. The analogue front end and converter still determine which signals can be processed.Example & full explanation →DMRDigital Mobile Radio is a family of digital radio standards. Amateur radio commonly uses DMR Tier II; channel configuration includes frequency, colour code, time slot and call destination.Example & full explanation →SimplexIn typical simplex voice operation, stations take turns transmitting and receiving on the same frequency. Only one station can speak intelligibly at a time.Example & full explanation →RepeaterA repeater receives signals and retransmits them. Many voice repeaters use different input and output frequencies; other stations are heard on the repeater output.Example & full explanation →

A wideband receiver and a handheld transceiver serve different purposes. A wider receive range does not automatically mean better sensitivity. Sensitivity depends on mode, measurement bandwidth and criterion, so this comparison does not create an overall ranking.

First check your required mode, then suitable antenna and accessory connections, and finally the power supply. A device’s transmit capability does not establish your personal permission to transmit.

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President Randy III+ →Nooelec NESDR SMArt v5 →