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UNDERSTAND THE EQUIPMENT

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Choose two or three models from my collection. Compare their purpose and documented features side by side.

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Duplicate models appear once. Missing data means ‘not documented’, not ‘not supported’. Power, weight and runtime figures apply only under their stated conditions.

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Documented model specifications
FeatureAlbrecht AE125H ↗RemoveNooelec NESDR SMArt v5 ↗Remove
Model
PurposeAnalog handheld scanner with 500 memories, Close Call and 8.33 kHz airband spacing.USB SDR covering 100 kHz–1750 MHz: Q-branch direct sampling for HF, a TCXO and an SMA antenna input.
Frequency ranges

Receive ranges
25–88 / 108–137 / 137–174 / 225–400 / 400–512 / 806–960 MHz

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

ModesNot documented — see detail page.

Modes
Software-dependent demodulation; receive only

Transmit powerNot documented — see detail page.Not documented — see detail page.
Connections

Antenna / audio
BNC / 3.5 mm earphone socket

USB
Mini-USB

Antenna connector
Female SMA, 50 Ω

Computer connection
USB Type A

Power supply

Power
2 × AA; documented package includes 2 × 2300 mAh NiMH

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

Dimensions and weight

Dimensions, W × H × D
67 × 115 × 33 mm

Weight
205 g without batteries

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

Weight
34 g

Enclosure
Aluminium, internal heatsink

Protection and operating conditions

Operating temperature
−20 to +60 °C; Close Call −10 to +50 °C

Not documented — see detail page.
Highlights
  • Seven service searches: emergency, Freenet, PMR, marine, airband, CB and amateur radio.
  • Ten priority channels and named memories.
  • Close Call detects nearby transmitters.
  • 100 permanent and 100 temporary search lockouts.
  • 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 sources

Service-search names describe the manufacturer’s factory presets. The AE125H does not decode digital voice formats such as DMR or D-STAR.

Full 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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Albrecht AE125H →Nooelec NESDR SMArt v5 →