W2IHY EQplus Manuel utilisateur
OPERATING MANUAL
EQplus
AUDIO
PROCESSOR
September 2004
Julius D. Jones
19 Vanessa Lane
Staatsburg, N.Y. (12580)
(845) 889-4253
E-mail: Julius@W2IHY.COM
Home Page: http:// www.w2ihy.com
c 2004 W2IHY, ALL RIGHTS RESERVED
-2-
TECHNOLOGIES
W2IHY
EQplus
AUDIO
PROCESSOR
OPERATING MANUAL
TABLE OF CONTENTS
Introduction ......................... 4
Front Panel Controls .......... 5 - 9
Rear Panel Controls ............10 - 11
Schematic (Front Panel) .......12 - 13
Schematic (Rear Panel) .......14
Rear Panel Controls ...........15
Getting Started Tutorial .......16-19
Internal Wiring .................... 20
Audio Out Cable wiring ...... 21 - 24
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-4-
The EQplus is the next generation of audio processing
equipment from W2IHY Technologies. The EQplus was
designed to be directly attached to the world famous
W2IHY 8 Band EQ. The EQplus provides features such
as Audio Compression, Downward Expansion, Effects
and connectivity to 3 radios. All these features, and
more, were designed in a way that makes the EQplus
easy to use. Extensive testing was done by amateurs
on many different radios on AM, FM and SSB so that the
product would be ready for you to use problem free.
Buying the EQplus gives you the availability to Amateur
Service unrivaled in the hobby. We feel so confident that
you will be delighted with the EQplus that we offer a 30
day money back, no questions asked guarantee. The
EQplus represents the new reference point for easy to
use amateur radio audio equipment.
If I did not think you would be delighted with The EQplus
I would have not put my call sign on it. Thanks for your
purchase and we appreciate your business.
Julius D, Jones (W2IHY)
INTRODUCTION
EQplus
AUDIO
PROCESSOR
-5-
FRONT PANEL CONTROLS
1
2
6
This section describes each of the controls on the front panel. You
should read through this section now. Some of the descriptions will
be more meaningful after you first work through the Getting
Started Tutorial.
This switch turns the unit's power on and off.
This LED goes on when power is on in the unit.
(1) Power On/Off Switch (S1)
(2) Power on LED (LED1)
(3) Audio Input Mic PWR (Power) Switch (S6)
Turning this switch on puts +5V onto what is plugged into the Mic
In and Aux Input connectors. The Mic power switch must be on if
you have any of the following microphones connected directly into
the EQplus:
- ICOM HM12, HM36, SM6 etc..
- Heil microphones made specifically for ICOM radio’s such as
the HMI and ICM
- Elecract MH2 (made for the Elecraft radio by Heil Sound )
711 12 10
514 15 13
8
4
9
317
16
FRONT PANEL CONTROLS
-6-
(4) Audio Input Impedance Switch (S5)
(5) Mic In Gain (R12)
(6) LED Bar Graph
,
This 3 position toggle switch is used to change the input impedance
of the Mic and Aux Inputs (19,20 & 21). Input Impedances of 200 ohms,
600 ohms and 50K ohms ( HI-Z)may be selected.
This potentiometer, when turned clockwise, can increase the Audio Input
signal levels up to about +40dBv. The mic gain should be changed
until 3 or 4 green Bar Graph (7) LED’s
are illuminated. Audio levels should be maintained in the green and
yellow ranges of the LED Bar Graph(6) .
The 10 segment LED Bar Graph indicates peak to peak EQplus internal
audio levels. The position of the Equalizer (7) and Compressor /
Downward Expander (10) switches control what internal function is being
indicated. The tables below defines what the LED Bar Graph is indicating.
The pictorial below shows the EQplus Audio Chain
while
speaking into the microphone
EQplus BAR GRAPH MONITORING
Compressor Equalizer Bar graph monitoring
off off Output of Audio Amp
off on Output of Equlaizer
on off Output of Compressor
on on Output of Compressor
dB reading
Peak to Peak
voltage
0 1 Volt
-6 500 mv
-12 250 mv
-24 125 mv
V
V
V
V
V
V
V
Dual
Band EQ
BAR
GRAPH
Comp./
Dwrd Expd.
EFFECTS
PROC.
ON
OFF
Audio Out
AUDIO
AMP
ON
OFF
ON
OFF
EQplus AUDIO CHAIN
V
V
Audio
Amp
Audio IN
FRONT PANEL CONTROLS
(7) Equalizer On/Off Switch (S3)
(8) Equalizer Bass (R37)
(9) Equalizer Treble (R38)
(10) Compressor / Downward Expander On/Off Switch (S2)
(11) Compressor / Downward Expander COMPRESSOR (COMP)
POTENTIOMETER (R22)
This switch turns the Equalizer on and off. When the equalizer is
off, adjusting the bass and treble controls have no effect on the
output audio.
This rotary potentiometer works only when the Equalizer Switch
(7) is on. Turning this control clockwise increases the amount of
bass boost. Turning this control counterclockwise decreases the
amount of bass boost. The detent at the half way point of rotation
represents 0 dB of boost. Each case marking represents 4dB.
This rotary potentiometer works only when the Equalizer Switch
(7) is on. Turning the control clockwise increases the amount of
treble boost. Turning this control counterclockwise decreases the
amount of treble boost. The detent at the half way point of rotation
represents 0 dB of boost. Each case marking represents 4dB.
When the switch is in the off position the compressor and
downward expander have no effect on the EQplus’s audio.
This potentiometer works only if the Compressor / Downward
Expander switch (10) is on. The COMP potentiometer controls
the amount of compression that will be done by the unit. If the
COMP potentiometer is turned fully counterclockwise then there
will be no compression introduced (0 dB) to incoming signals.
If the COMP potentiometer is rotated fully clockwise then
-7-
FRONT PANEL CONTROLS
Incoming signals will have up to 20dB of compression introduced.
The EQplus compressor circuitry contains a limiter that is preset
at the factory. The limiter is set to limit the processed signals to
375 millivolts (-9 dB). When this level is reached the 1-st yellow
LED on the bar graph will be on and the top Red (Limiting) LED
will turn on. Additional increases in audio level, using either the
Audio Input Gain Potentiometer or the Equalizer Potentiometers,
will result in a small increase in output from the compressor’s
circuitry. The good news is that the EQplus can produce high
levels of compression while maintaining fidelity and very low
distortion levels. The RF compressors in many radio’s have
difficulty attaining high levels of compression with low levels
of distortions. RF compressors roll off the low end audio response
of the signals they process. The net result of the EQplus
compressor is up to 20dB of signal compression with very low
distortion and little to no change in overall audio bandwidth. .
This potentiometer works only if the Compressor / Downward
Expander switch (10) is on. The Downward Expander removes
unwanted audible sounds such as fan noise. The Downward
Expander is operated by turning the DE LEVEL Control clockwise
just to the point where unwanted sounds are removed.
(12) Compressor / Downward Expander Downward Expander
Level (DE LEVEL) POTENTIOMETER (R47)
(13) EFFECTS PROCESSOR PROGRAM SELECT / OFF
SWITCH (S4)
This 3 position toggle switch is used to select one of two effects or
to turn the Effects Processor off. When the Effects Processor is
off the Effects Processor Delay and Level controls will not modify
internal EQplus audio. The toggle switch in position 1 selects
Effect 1. Effect 1 emulates dampening sound reflecting multiple
times from a surface. The toggle switch in the position 2 selects
Effect 2. Effect 2 emulates sound reflecting once from a surface.
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FRONT PANEL CONTROLS
(14) EFFECTS PROCESSOR DELAY Potentiometer (R42)
(15) EFFECTS PROCESSOR LEVEL Potentiometer (R47)
(16) OUTPUT LEVEL Potentiometer (R44)
(17) Monitor (Mon) LEVEL Potentiometer (R39)
This potentiometer works only if the Effects Processor 3 position
toggle switch is selecting either effect 1 or effect 2. The Delay
control, when rotated clockwise increases, by up to about
80 milliseconds, the time that audio waveform is delayed. The
delayed waveform is then mixed with the original non delayed
waveform. The mixed waveform is next sent to the output of
the EQplus.
When the pot is turned clockwise, at the halfway point, there is a
detent. This represents a starting point for adjusting the Effects
Processor Delay..
This potentiometer works only if the Effects Processor 3 position
toggle switch is selecting either effect 1 or effect 2. The Level
control, when rotated clockwise, increases the amplitude that
the delayed audio waveform is combined with the original non
delayed waveform.
When the pot is turned clockwise, at the halfway point, there is a
detent. This represents a starting point for adjusting the Effects
Processor Level.
This potentiometer varies the output level from about 10
millivolts to about 1 volt peak to peak.
This potentiometer adjusts the audio level into the Phones
Connector (24).
-9-
REAR PANEL CONTROLS
19 18 22
20 23 24
21 22 25
(18) MIC SELECT
(19) MIC INPUT
This three position switch selects the YAESU, KENWOOD or
ICOM microphone plugged into the 8 pin Mic Input (19).
(Other microphones supported with mic adapters)
This Input uses an 8 Pin microphone male connector. The
impedance of this input is set by the Audio Input 3 position
toggle switch (4). Do not use this connector when RCA Mic
In (20) or the Aux Input (21) is being used.
Icom Ken Yaesu
+Mic +Mic
+5V PTT +5V
PTT +5V
PTT
Gnd - Mic Gnd
Gnd +Mic
1
2
5
6
7
8
J8
Pin
PTT
PTT
Gnd
Gnd
-10-
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