50K-500MHz Wideband Active Small Magnetic Loop LZ1AQ Amplifier HF AM FM

T :This does not include the 12V linear power supply, in order to better play the effect, please purchase a high-quality power supply by yourself

This version of the small loop is a small-size full-band loop magnetic field active receiving .

The receiving frequency range is 50kHz to 500MHz, mainly by the top jumper board, small ring amplifier board,

Small loop , feeder, feeder and 12V linear power supply, among which the top jumper board

And there are several groups of switches on the small ring amplifier board, and different structures can be realized by adjusting the position of the switches.

The small loop of the structure, in which the Mobius loop can achieve twice the voltage gain of the ordinary small loop;

The electric field shielding ring can effectively reduce the interference caused by the surrounding electric field, such as lightning, static electricity

Discharge, etc.; the structure of the unshielded ring is simple, and the whole small ring can be replaced by a thicker wire,

Simple size modification and easy erection. The installation and connection method of this version of the small loop are as follow

shown:

This version of the small loop is shpinglist :

1pcs small loop amplification board,

1pcs feeder,

1pcs top jumper board

2pcs small loop s (RG402 coaxial cable)

1pcs 5-meter feeder cable

1pcs 1-meter feeder cable

2pcs non-marking adhesive hook

not include the 12V linear power supply

The switch positions on the jumper board and the small ring amplifier board determine the structure of the small ring.

The structure jumper method is shown in the following figure:

1. Möbius ring switch configuration method

2. Electric field shielding ring switch configuration method

3. Configuration method of unshielded ring switch

4. This amplifier test

The amplifier board in the flying fish version of the small loop adopts the low noise amplification of the improved version LZ1AQ

implemented with a bandwidth from 50kHz to 500MHz, with a gain greater than 10dB, and a low

The input impedance (1.2Q@1MHz) effectively reduces the electric field interference. 12V linear

Power supply, the current does not exceed 150mA.

The specific test curve of the amplifier board is shown in the following figure:

Figure 1 Input impedance test curve

Figure 2 Output impedance test curve

Figure 3 Output noise floor test curve

Figure 4 Gain Test Curve 1

Figure 5 Gain Test Curve 2

5. This feeder test

The feeder is mainly to supply power to the small loop , and p>

The most ant indicators are the insertion lo of the feeder and the saturation of the inductor used by the feeder

current. The RF port of the power injector is connected to receiving equment such as a radio or SDR, and the RF+DC end

The port is connected to the small loop amplifier. It is strictly prohibited to reverse connection or short circuit if this port has a power supply (there is a

500mA self-recovery insurance, automatic protection after short circuit), DC port is connected to linear power supply,

The noise of this power supply will directly act on the and affect the receiving performance. Linear power supply can be used.

Or battery pack powered. The actual photos and test curves of the specific feeder are shown in the following figure:

Figure 7 Feeder end interface

Figure 8 Receiver Port

Figure 9 Feeder Insertion Lo Test

6. Small loop technical indicators:

Receiving frequency range: 50kHz to 500MHz

Gain: 17dB@10MHz

Output noise: -125dBm (@10MHz, BW=100Hz)

P1dB: +15.5dBm@10MHz

O3: +38dBm@10MHz

Supply Voltage: 9V to 12V

Supply Current: 130mA to 150mA

interface: SMA(M)

Output interface: SMA(F)

Small Ring Coaxial Cable Model: RG402

Small ring coaxial cable lo: 0.145dB/m

Small loop diameter: 60cm

References: 1. https://vaedrah.angelfire.com/.htm

2. http://www.lz1aq.signacor.com/docs/wsml/wideband-active-sm-loop-.htm

3. https://airspy.com/youloop/

4. https://www.g8jnj.net/moebius-loop-

5. https://www.g8jnj.net/loop-inductance

About shping
Shping and Packaging All it will be double checked and well packed before sending.It will be dispatched within 2 business days after buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for e areas,it may take a little longer). 

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