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AMMAX 3000+ DSP PWM AM Transmitter  


AM transmitter with DSP processing, PWM modulator and DDS frequncy generator

While for many mentioning AM transmitters brings back childhood memories, these are actually still used widely in some countries. Besides, AM can be lots of fun to play with. Long wire antennas, different signal propagation (even worldwide), the nostalgia that comes packed with it... well, it is something very different in this modern age.
Our old AM MAX units sold out many years ago and for a long time we wanted to make a new AM transmitter, this time with different, more modern approach, with new better parts and better specs. And we finally did. It is equipped with DSP which makes it possible to control parameters of the audio chain, such as the compression, low pass audio filter cut frequency and preemphasis via convenient LCD with menu system. Other features, such as the fully solidstate PWM modulator which ensures crisp audio, 125% positive peak modulation, compact form factor, plenty of audio input options and LCD display unit make AMMAX3000+ really something special in this modern age.

What is new in AMMAX3000?
- Robust output RF stage based on larger FET
- Robust PWM output stage based on larger FET
- Stronger on-board DCDC
- A number of small fixes and improvements
- Improved firmware (several LPF filters can be selected)
- Removed one trimmer for easier setup
- Support for Barix internet streaming with Mp3 playback backup
- CW jumper for CW operation

All our manuals are available here.


Technical specifications:
- RF Output Power AM: ~10W carrier (24V-50V DC stabilised, use 50V for maximum power), varies with band and frequency
- Peak RF Output Power: ~60W (due to > 125% positivemodulation)
- Output connector: BNC
- Output Impedance: 50 Ohms
- Frequency Range (MW version): 540-1710KHz
- Frequency Range (shortwave version): 160m, 80m, 40m (other SW bands also available, please ask)
- PLL Steps: 1KHz
- Frequency stability: +/- 50Hz
- RF output: Harmonics: -50dB, Spurious: -80dB
- Power Supply: 48V/2.5A DC stabilised
- Wideband design, no tuning required
- Audio performance: compressor, low pass filter, limiter, treble, bass adjustment
- RF output ruggedness: > 2:1 VSWR
- Modulation: AM (CW input on-board. TTL 5V for disable)
- PCB size: 100x125mm
- Audio input: accepts either mono or stereo signal (transmission is mono)
- Audio connectors: 3-pins for GND, L and R signals. With audio input board you also gain XLR, RCA and USB audio input
- DRM support: On-board jumper can disable DSP processing which is great for DRM modulation
- Modulation: AM, >125% positive mod
- PWM circuit is opto isolated and can be used to drive high power external stage

What is the audio input board:
- Audio input board adds XLR, RCA and USB audio inputs to the transmitter. It is also equipped with extra input limiter, low pass filter and balanced input stage with ESD protection. You may think this is not needed, but believe us it is nice to have.

Suitable DIY antennas for the AM transmitters:
Link 1, link 2, link 3, link 4, link 5

What is the Barix audio streaming with MP3 playback option?:
- We will install Barix instreamer inside with STL firmware for you and you can play audio from audio streams. There is also automatic MP3 playback from USB that starts where there is no active stream.

Discuss AM transmitters in our forum!

This product was added to our catalog on Monday 23 January, 2006.
 *Please select the quantity for each item you wish to order and click the 'Add To Cart' button below.
Displaying 1 to 11 (of 11 products) Result Pages:  1 
    Name   Model   Select   Price 
AMMAX3000+ 540-1710KHz + 3-key LCD display  AMMAX3000+ 540-1710KHz + 3-key LCD display     249.99EUR
AMMAX3000+ 540-1700KHz in 1H rack (needs 48V 1.5A)  AMMAX3000+ 540-1700KHz in 1H rack (needs 48V 1.5A)     389.99EUR
AMMAX3000+ HAM 40m-80m + 3-key LCD display  AMMAX3000+ HAM 40m-80m + 3-key LCD display     259.99EUR
AMMAX3000+ HAM 40m-80m + 1H rack (needs 48V 1.5A)  AMMAX3000+ HAM 40m-80m + 1H rack (needs 48V 1.5A)     409.99EUR
AMMAX3000+ 6-7MHz + 3-key LCD display (tested board)  AMMAX3000+ 6-7MHz + 3-key LCD display (tested board)     259.99EUR
AMMAX3000+ 6-7MHz in 1H rack (needs 48V 1.5A)  AMMAX3000+ 6-7MHz in 1H rack (needs 48V 1.5A)     409.99EUR
AMMAX3000+ 3-key LCD display (other SW band)  AMMAX3000+ 3-key LCD display (other SW band)     299.99EUR
AMMAX3000+ in 1H rack (other SW band)  AMMAX3000+ in 1H rack (other SW band)     419.99EUR
Audio input board (RCA+XLR+USB) + 20cm flat cable  Audio input board (RCA+XLR+USB) + 20cm flat cable     49.99EUR
Suitable 48V power supply  Suitable 48V power supply   You can use your own  89.99EUR
Barix IP internet streaming upgrade with MP3 USB backup  Barix IP internet streaming upgrade with MP3 USB backup   Only for 1H rack  249.99EUR
Displaying 1 to 11 (of 11 products) Result Pages:  1 
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