Ham Devices - EQ V.1

Sound 5-band Equalizer

with compressor and low noise preamp to transceiver V.1

5-band EQ with a compressor and an adjustable microphone amplifier is made a very litlle plate ( mm) with trimmer

At the bottom of the housing rubber feet.

This device works with any type of ICOM, KENWOOD, YAESU, TEN-TEC and other radios. It is capable of changing the standard signal of your transceiver. With this small device, you can get a sound similar to the sound of the resulting 5 big expensive mixer boards. Why? Because it is designed specifically for ham radio and signal bandwidth of 3-4 kHz.

For an example, see the frequency response of the two signals on the transceiver ICOM-756pro

( Blue color - without EQ and with HM-36 tangent, Green colour without EQ with Electret mike, Purple colour - with EQ and Electret mike)

Circuit board devices are so small that you can install the unit in the transceiver housing or tangent. The next photo shows the comparative sizes:

The next photo shows the mounting schematic:

For example I show the photo, how make this device in housing ( my friend radioamateur) and using with his Icom-746. As you can see equalizer do not have extra wires, it does not need external power supply, power is taken from the microphone 8pin jack ICOM-746 (remind current consumption of only 8 mA). My friend put 3.5mm jack in housing for mike Heil company and RCA jack for PTT (pedal). It is very simple, see photo: