Dedicated to Quality Engineering

AMT3000 and AMT5000 AM Radio Broadcast Transmitter Kits

Setting the Quality Standard for High Quality, Low Power, FCC Part 15 Transmitters



Catalog Page

Contact Us


AMT3000 Specifications

Frequency Coverage:

530 kHz - 1700 kHz in 10 kHz steps or 522 kHz - 1710 kHz in 9 kHz steps, depending on order option

Frequency Selection Method:

8-position DIP switch

Frequency Tolerance @ 25C:


Modulation Type:

Amplitude Modulation (AM)

Maximum Modulation Level:


Power Input to Final RF Stage:

100 mW


118 wire (supplied with kit)

Antenna Matching:

Tunable pi-network. Matches high impedance antenna to low-impedance RF output stage.

Output Tuning:

4-position DIP switch selects inductance combination, adjustable ceramic trimmer capacitor peaks resonance.

RF Output Metering:

Test points on circuit board provide DC voltage to user-supplied 10 megohm/volt voltmeter. Measured voltage is maximum at resonance.

RF Grounding Options:

Jumper plug options for including/excluding RF isolation inductors in power supply and audio source ground paths.

Audio Response:

20 Hz to 20 kHz 1 dB

Audio Treble Boost:

+8 dB, boost midpoint at 2 kHz. Jumper plug option.

Audio Distortion:

Less than 0.5% THD through audio stages.

Minimum Audio Input Level:

200 mV RMS for 100% modulation (input gain control at max).

Audio Compression:

Compression ratio adjustable from 1:1 to 5:1. Attack time less than 1 ms. Medium release time suitable for both voice and music.

Audio Limiting:

Adjustable threshold. 15:1 compression above threshold.

Front Panel Controls:

Audio input gain, modulation level, compression ratio.

Rear Panel Jacks:

2 RCA audio in jacks, RCA antenna/ground jack, 2.1 mm power input jack.

Power Consumption:

120 VAC, 2 watts

Circuit Board:

5W x 3.9D x .062H FR4, two layers, 1 oz. copper, top and bottom solder masks, top silkscreen.


6.1W x 4.2D x 1.5H ABS plastic. Drilled and labeled front and rear panels.


SSTRAN Home Page


Copyright 2003-2011 SSTRAN  All Rights Reserved.