Second Hand AOR AR3000A Plus Wideband Receiver 1
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Second Hand Radio equipment

Second Hand AOR AR3000A Plus Wideband Receiver

AOR 3000A Plus, VERY rare modified version to the great 3000A receiver which was carried out by AOR UK when the radio first came out!

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£499.00
(£499.00 exc. VAT)
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Product code: SH-AR3000A-PLUS
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Item CostFinance OptionDepositMonthly PaymentsTotal Cost
£499.00
12 Months 14.9% APR
£49.90
£43.00
£565.92
£499.00
18 Months 14.9% APR
£49.90
£28.67
£565.92
£499.00
24 Months 14.9% APR
£49.90
£21.50
£565.92
£499.00
36 Months 14.9% APR
£49.90
£14.33
£565.92
£499.00
48 Months 14.9% APR
£49.90
£10.75
£565.92
£499.00
12 Months 19.5% APR
£49.90
£44.72
£586.57
£499.00
18 Months 19.5% APR
£49.90
£29.82
£586.57
£499.00
24 Months 19.5% APR
£49.90
£22.36
£586.57
£499.00
36 Months 19.5% APR
£49.90
£14.91
£586.57
£499.00
48 Months 19.5% APR
£49.90
£11.18
£586.57

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Second Hand AOR AR3000A Plus Wideband Receiver 1

Second Hand AOR AR3000A Plus Wideband Receiver


The AR3000A+ (PLUS) is the result of popular request by enthusiasts and carries several custom modifications which have been developed and implemented in our UK workshop. A summary of the additions and operation follows:

WEFAX SATELLITE narrower switchable filter

The WEFAX custom modification has been designed to optimise the receiver’s pass-band for reception of orbital weather satellites operating in the VHF band around 137.500 MHz and geostationary satellites operating in the UHF band around 1691 MHz. Ideally an I.F. bandwidth of 30 - 50 kHz is required for reasonable results, unmodified the AR3000A is too narrow on NFM and too wide on WFM.

Of course you still require some form of data decoder such as the AOR WX2000 decoder/printer (no longer available as new) or a computer hardware / software package. For VHF reception a crossed dipole is quite adequate but a dish or yagi is required for UHF along with a LNA (low noise amplifier).

NARROW AM switchable filter

The narrow AM filter custom has been designed to optimise the receiver’s pass-band for reception of short wave AM broadcast transmissions. Generally speaking on long and medium wave a 9 kHz channel spacing is used (in Europe) and a 5 kHz channel spacing for short wave. The standard AR3000A AM filter is 12 kHz as this permits reception of "offset" civil airband transmissions, the same filter is also used for NFM.

The modification adds a rear panel switchable narrow AM filter (the same switch as used for WEFAX switching - both are switched at the same time), the filter specification bandwidth is 4.0 kHz but when fitted "in circuit" is actually wider than this. There is still a very worthwhile improvement which helps reduce BLOCKING when listening close to a strong transmission, heterodynes may also be reduced or removed when listening to many transmissions. There is also a small increase in sensitivity over the standard filter by a few dB.

SDU5000 spectrum display "ready"

A new spectrum display unit designed to compliment the AR3000A, in order to provide compatibility, a custom modification has to be carried out to ensure the AR3000A+ (PLUS) is ready to go!

Summary of SDU5000: The SDU5000 Spectrum Display Unit adds a variety of features to extend a receiver’s capabilities, such

as visually identifying new active frequencies and taking measurements. The SDU-5000 may be used with a number of receivers which have a 10.7 MHz I.F. output and produces a bandwidth up to ± 5 MHz in 1 kHz increments with a resolution of 5 kHz or 30 kHz. The SDU-5000 remains compact due to the use of an internal 3.1" HQM simple matrix 16 colour LCD 192 dot x 210 dot.

An external home colour television with video input may also been connected (PAL or NTSC). In particular the AR3000A has been designed to provide best compatibility by communicating directly via the receiver’s CPU via the RS232 port / SDU-5000 COM1 ensuring the full potential of the SDU may be exploited.

Tape recorder compatibility

This custom modification enables the AR3000A to provide better compatibility with a range of off the shelf tape recorders. The receiver uses a pair of Darlington transistors for tape motor On/Off control. While this is suitable for many machines, some require independent relay contacts.

The modification consists of a small internally fitted double pole slave relay driven by the switching transistors. One pair of relay contacts feed back to the AUX socket via a 10 OHM resistor (to prevent relay sticking) and provides independent relay contacts not referenced to ground. The second pair of contacts feed audio to the AUX socket when the squelch is open with a high value resistor preventing noise pick-up when the contact is open. Constant audio is still fed to another pin of the AUX socket taken from a point before the relay (audio is permanently fed so that commercial users may decode CTCSS signals without encountering any squelch rise time). This makes the tape output modification ideally suited for direct DC switching of tape motors (not mains!) and for voice activated systems.

Discriminator output

This custom modification provides an output to the rear panel AUX socket taken directly from the FM MC3357 IC. This ensures the best compatibility with specialist data receives used on the VHF bands for decoding pagers etc.

* Frequency Range: 100kHz - 2036MHz * Modes: USB, LSB, CW, AM, NFM, WFM * 400 memories (4 banks of 100 Ch) * 50 Ch. per sec. scan rate * 50 steps per sec. search rate * Antenna connector: 50 Ohms BNC * RS232 port * Audio 70mW (8 Ohms) * Supply: 13.8V DC approx. 500mA (not included) * Size: 138 x 80 x 200mm * Weight 1.2kg

AOR 3000A Plus, VERY rare modified version to the great 3000A receiver which was carried out by AOR UK when the radio first came out!

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