W2IIHY W2IHY Operating instructions

Brand
W2IIHY
Model
W2IHY
Category
Network switches
Type
Operating instructions

This manual is also suitable for

W2IIHY W2IHY is a flexible and powerful 8-band audio equalizer, noise gate, and microphone preamplifier designed for amateur radio use. With W2IIHY, you can easily improve the sound quality of your transmitted audio, reduce background noise, and boost your microphone signal. The device features:

  • 8-band graphic equalizer with adjustable center frequencies and +/-16dB of gain
  • Noise gate with adjustable threshold and release time
  • Microphone preamplifier with adjustable gain
  • Balanced XLR and unbalanced RCA microphone inputs
  • Balanced XLR and unbalanced RCA line outputs
  • 5-pin DIN microphone output connector

W2IIHY W2IHY is a flexible and powerful 8-band audio equalizer, noise gate, and microphone preamplifier designed for amateur radio use. With W2IIHY, you can easily improve the sound quality of your transmitted audio, reduce background noise, and boost your microphone signal. The device features:

  • 8-band graphic equalizer with adjustable center frequencies and +/-16dB of gain
  • Noise gate with adjustable threshold and release time
  • Microphone preamplifier with adjustable gain
  • Balanced XLR and unbalanced RCA microphone inputs
  • Balanced XLR and unbalanced RCA line outputs
  • 5-pin DIN microphone output connector
W2IHY
8BAND
AUDIOEQUALIZER
AND
NOISEGATE
OPERATINGMANUAL
W2IHY 8BAND AUDIO
EQUALIZER AND
NOISEGATE
OPERATINGMANUAL
October2003
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2000W2IHY, ALL RIGHTSRESERVED
-2-
TECHNOLOGIES
W2IHY
MICOUT&POWERCABLEWIRING
-27-
TENTEC
DRAKETR7
DRAKET4XB
COLLINS32S1,32S3
COLLINSKWM2A
COLLINS32V2,32V3
KWS-1
Hallicrafters
E.F.Johnson
HI-Z
HI-Z
Kenwood
TS520/TS530
TS820/TS830
+Mic
+Mic
+Mic
+Mic
-Mic
-Mic
-Mic
-Mic
-Mic
+Mic
+Mic
-Mic
PTT
PTT
PTT
PTT
PTT
PTT
GND
GND
GND
GND
GND
GND
4PinMicConnectorPin3
4PinMicConnectorPin2
4PinMicConnectorPin3
4PinMicConnectorPin2
4PinMicConnectorPin2
4PinMicConnectorPin3
4PinMicConnectorPin1
4PinMicConnectorPin3
4PinMicConnectorPin1
4PinMicConnectorPin1
2PinMicConnectorPin1
2PinMicConnectorPin2
2PinMicConnectorSpring/Case
4PinMicConnectorPin2
4PinMicConnectorPin1
4PinMicConnectorPin4
Equalizer/NoiseGateMicOuttoXcvrcablewiring
Power GND
+7to14Vdc
ShieldofCable
ShieldofCable
ShieldofCable
ShieldofCable
ShieldofCable
ShieldofCable
DINconnectorsshownonthesidetobesoldered
DONOT SOLDER TOSHIELDOFDIN
TABLEOFCONTENTS
Introduction...........................6
FrontPanelControls.....7-9
-Pictorial
-
-PowerOnLED
-EqualizerOn/Off
-EqualizerControls
-NoiseGateOn/OffSwitch
-NoiseGateLED
-NoiseGateLevel
-NoiseGateDelay
-MicGainLED
PowerOn/Off/PhoneVolumecontrol
-3-
RearPanelControls..10,11
-Pictorial
-MicSelect
-MicInput(8pin)
-MicInput(XLR)
-MicInput(RCA)
-PTTInput(RCA)
-MicOutputSelect
-MicOutput A
MICOUT&POWERCABLEWIRING
-26-
AlincoDX77
Kenwood
TS130/140
TS430/440
TS850/TS870
TS930/940/950
SG2020
K2
JapanRadio
JST-135
JST-245
Yaesu
FT990/ft992
FT1000MP/M-V
+Mic
PTT
GND
ICOM
735
745/746
756/756PRO
775
781
KACHINA
Gnd
PTT
+Mic
Gnd
Gnd
PTT
PTT
-Mic
-Mic
-Mic
-Mic
+Mic
+Mic
8PinMicConnectorPin8
8PinMicConnectorPin5
8PinMicConnectorPin3
8PinMicConnectorPin1
8PinMicConnectorPin1
8PinMicConnectorPin7
8PinMicConnectorPin5
8PinMicConnectorPin6
ShieldofCable
ShieldofCable
ShieldofCable
ShieldofCable
8PinMicConnectorPin2
8PinMicConnectorPin2
8PinMicConnectorPin6
8PinMicConnectorPin7
8PinMicConnectorPin7
8PinMicConnectorPin1
8PinMicConnectorPin8
+Mic
PTT
GND
-Mic
8PinMicConnectorPin6
8PinMicConnectorPin7
ShieldofCable
8PinMicConnectorPin8
ICOMBALANCED
MODULATOR
746
756/756PRO
775
781
910H
+Mic
PTT
GND
-Mic
8PinDINConnectorPin3
8PinDINConnectorPin2
ShieldofCable
8PinDINConnectorPin4
DINconnectorsshownonthesidetobesoldered
DONOT SOLDER TOSHIELDOFDIN
Yaesu
FT102/107
FT707/747/757/767
FT847
FT1000/1000D
TABLEOFCONTENTS
-4-
RearpanelControls...........12
-MicOutputB
-Phones
-Power
BottomPanelControls...13
-Pictorial
-MicInGain
-MicOutputLevel
-Micinputimpedance
Schematics
-8bandMotherBoard...14,15
-8BandEQPotBoard…16
GettingStartedTutorial..18,19
- AdjustingMicInLevel
- AdjustingMicOutLevel
- AdjustingNoiseGateLevel
- AdjustingNoiseGateDelay
- AdjustingtheEqualizer
ChangingEQBandpass
CenterFrequencies........17
-25-
MICOUTWIRINGOPTIONS
MICOUT A/B
5PinMaleDIN
Dinconnectorsshown
onsidetobesoldered Gnd
PTT
-Mic
+Mic Balanced
Output
Hi-ZOutput
LowImpedanceBalancedOutputtoLowImpedanceRadio
5PINDINMICOUTPUTCONNECTION
LowImpedanceUnbalancedOutputtoLowImpedanceRadio
LowImpedanceUnbalancedOutputtoHighImpedanceRadio
HighImpedanceUnbalancedOutputtoHighImpedanceRadio
DONOTCONNECTMICWIRESHIELDTOSHIELDOFDINCONNECTOR
CONNECTONLY ASSHOWN
MICOUT A/B
5PinMaleDIN
Dinconnectorsshown
onsidetobesoldered Gnd(Miccableshield)
PTT
-Mic
+Mic Balanced
Output
MICOUT A/B
5PinMaleDIN
Dinconnectorsshown
onsidetobesoldered Gnd(Miccableshield)
PTT
+Mic Unbalanced
Output
MICOUT A/B
5PinMaleDIN
1KOhm
Dinconnectorsshown
onsidetobesoldered Gnd(Miccableshield)
PTT
+Mic
MICOUT A/B
5PinMaleDIN
1KOhm
Dinconnectorsshown
onsidetobesoldered Gnd(Miccableshield)
PTT
HI-Z
INTERNAL WIRING
-24- -5-
TABLEOFCONTENTS
PCBoardsandParts
-MotherBoard...................21
-8BandEQBoard.............22
-RearConnectorBoard....23
Internalwiring........................24
PreliminaryEqualizerSettings...20
MicOutandPowerCableWiring
-MicOutWiringOptions....25
-MicOutandPwrCableWiring26,27
MICIN
Shortest
Lead
Shortest
Lead
Shortest
Lead
Shield
not
Connected
J16 C41-.01uf
J2
MICIN
PIN1
PIN7
J9
PHONES
PIN1
PIN2
J1-3
J1-1
J1-15
J1-2
J1-16
J1-14
J1-13
10“
16-1/2“
10“
6“
10“
E17
NotethatJ1-Xistheflatribbon
cableshownonpage15
Shield
Shield
Shield
Shield
Shield
Shield
Shield
Shield
Shield
INTRODUCTION
W2IHY AUDIOEQUALIZER
AND
NOISEGATE
Analoganddigitaltechnologyhaveformanyyearsbeenusedinthe
audioindustrytodoaudioequalizationandnoisereduction.Many
amateurshavepurchasedaudioequalizersandotherequipmentwith
thehopeofimprovingtheirtransmittedaudiosignal. Theamateurswho
havesucceededhaveinmanycaseshadtopaypremiumpricesfor
audioequipmentthatnotonlyrequiredmodifying,toproperly
interfacewiththeiramateurstations,butalsohadtobehardenedto
tolerateR.F.
TheW2IHY 8Band AudioEqualizerandNoiseGatesolvestwobasic
problemsmanyhamsexperience. The AudioEqualizerallowsthe
usertochangethetransmittedaudiofrequencyresponsewithout
changingmicrophonesormicrophonecartridges. Transmittedaudio,
withsubstantialhighfrequencycontent,canbeusedtoworkDXor
communicateinbandconditionswherethereisasignificantamount
ofnoise. A balancedfrequencyresponsemaybemoredesirablein
strongsignal,fullnoisequietingenvironments.Manyamateuroperators
transmitaudioinhighambientnoiseenvironments. Typicalhighnoise
sourcesincludelinearamplifierfans,dehumidifiers,roomair
conditioners,roadandwindnoiseduringmobileoperation,etc..
TheNoiseGateeliminatestheaforementionednoisefrombeing
transmitted.Ontheairtestsinhighambientnoiseconditionshave
showntheNoiseGatetobeveryeffective. Theremovalofmoderate
toveryhighlevelsofambientnoise,fromthetransmittedaudiosignal,
resultsinaudiowithincreasedclarityandpresence.
ExtensivetestingwasdoneoftheNoiseGateandEqualizer. Theunit
hasbeendesignedtoworkinhighRFenvironments.Wefeelso
confidentthatyouwillbedelightedwiththeunit
TheW2IHY Audio
EqualizerandNoiseGaterepresentsaffordableaudiotechnology
designedforamateurradiouse.
weoffera30day
moneyback,noquestionsasked,guarantee.
-6- -23-
8BANDEQREARCONNECTOR
PCBOARDLAYOUT ANDPARTS
C41,C42-.001ufmylar
C40-.01mylar,
C7,C13,C37,C39-.1uFceramicmonolithic
C39-4.7uftantalumelectrolytic
J2,J4,J5-Male5PinDIN
R33,R34-47Kohm¼watt5%resistor
RFC2,RFC3-100uhR.F.choke
RFC4,RFC5-470uhR.F.choke
S4-4pole3positionrotaryswitch
S5-4PDT slideswitch
T1-600ohm:600ohmaudiotransformer
FRONTPANEL CONTROLS
This sectiondescribes each ofthecontrols onthefrontpanel. You
can readthroughthis sectionnow.Someofthedescriptions
willbemoremeaningfulafteryou first work throughthegetting
startedtutorial.
This switchandpotentiometer(Pot.)turns theunit's poweronand
offandis also used toadust theaudiolevel intothePhonejack (18)
This LEDgoes onwhenpoweris onintheunit.
This switchturns theequalizer onandoff.Whentheequalizer is
offadjusting theequalizer's controls has noeffect ontheoutput
audio.
(1)
(2)PoweronLED(LED3)
(3)Equalizer On/OffSwitch(S3)
PowerOn/OffSwitch(S1)/Phones(monitor)VolumeControl(R29)
-7-
1
2
3
4
5
69
8
7
8BANDEQBOARD
PCBOARDLAYOUT ANDPARTS
*MountedonpinsideofP.C.board
-22-
C15-.1uFmylar
C16-.1uFmonolithic
C17-.18uFmylar
C18-19-4.7uF Tantalumelectrolytic
C20-100uFelectrolytic
R1-10ohm¼watt5%Res
R2-R31Kohms¼watt5%Res
R4-3.3kohm10pin9RESSIP
R5-R6-3.3Kohm10Pin5ResSIP
R7-15.0Kohm¼watt1%Res
R8-100Kohm10Pin9ResSIP
R9-R1010Kohm¼watt5%Res
R11-R18,R20100KohmSlidePots*
R195KohmSlidePot*
R21-1Mohm10Pin9ResSIP
R22-R231m10PinResSIP
U1-U3 Tl074orJRC2060(14PinDIP)
J1(16PinDIP)
C1-300pFmylar
C2-390pFmylar
C3-560pFmylar
C4-.0012uFmylar
C5-.003uFmylar
C6-.0022uFmylar
C7-.0039uFmylar
C8-.0047uFmylar
C9-.0056uFmylar
C10-.01uFmylar
C11-.012uFmylar
C12-.018uFmylar
C13-.022uFmylar
C14-.047pFmylar
FRONTPANEL CONTROLS
(4)Equalizer CONTROLS(R11-R18)
(5)NoiseGateOn/OffSwitch(S2)
(6)NoiseGateLED(LED1)
These slide potentiometers work only whentheEqualizer On/Off
Switch S3is intheonposition. Thepotentiometers control
theoutputof8bandpass filters. Thecenter frequency ofthese
filters are50Hz, 100Hz, 200Hz, 400Hz, 800Hz, 1600Hz,
2400Hz and3200HZ. Thescale,forsetting these potentiometers,
is calibrated between-16db.to+16dB.Pushing apotentiometer
forward(up)willincreasetheoutputoftheequalizer withinthe
bandpass ofthefilterwhose slide potentiometeris changed.
Pushing apotentiometerbackward(down)willdecreasethe
outputoftheequalizer withinthebandpass ofthefilterwhose
slide potentiometeris changed. Settingall8potentiometers atthe
zero marking willproduce audioataboutthesame outputlevel
as whentheEqualizer On/OffSwitch S3(3)is intheoffposition.
Adjusting theequalizer 50Hz, 100Hz and200Hz slide pots
affects theheaviness /weightoftheaudio. Adjusting theequalizer
400Hz and800Hz slide pots affects thewarmthoftheaudio.
Adjusting theequalizer 1600Hz, 2400Hz and3200Hz slide
pots affects theclarity andpresenceoftheaudio.
This switchturns thenoise gateonandoff.Whenthenoise
gateis offchanging thegatedelay orlevel controls has
noeffect ontheaudio.Whenthenoise gateis offaudiois
always beingpassed(gated)throughthenoise gatetotheoutput.
This LEDis used tohelpproperly adjust thenoise gatelevel
control andtoindicate whenaudiois beingsent (gated)tothe
output. TheLEDbeingon(green)indicates thataudiois being
gatedthroughtheunittotheoutput. TheLEDbeingoffindicates
thataudiois notbeingpassed(gated)throughtotheoutput.
WhentheNoise GateOn/OffSwitch (5)is intheoffposition the
noise gateLEDis on.
-8-
8BANDEQMOTHERBOARD
PCBOARDLAYOUT ANDPARTS
-21-
*PartsmountedonpinsideofP.S.Board
C1,C3,C4,C6,C14,C25-C28,C334.7uFradialelectrolytic
C7*,C13*,C16,C17,C32.1uFceramicmonolithic
C8-22uFradialelectrolytic
C9,C29-4.7uFnonpolarizedradialelectrolytic
C10,C11,C12,C15,C31-100uFradialelectrolytic
C2,-10uFradialelectrolytic
C4-1uFradialelectrolytic
C18-C20-.1uFmylar
C5-.033uFmylar
C23-C24-470uFradialelectrolytic
C21,C34-.01uFmylar
C36-120pfceramic
C22,C35-.001uFmylar
D1,D2-1N914
D3-1N4001
LED1-GreenLED;LED2-RedLED;LED3- Amber
Q1-2N3417
REG1-7805withheatsink
Rfc1-470uHR.F.choke
R1,R2,R22-10Kohm5Resistor10pinSIP
R3-100ohm5Resistor10pinSIP
R4-1Kohm5Resistor10PinSIP
R5,R6,R27,R30-10ohm¼watt5%Resistor
R7,-6.8Kohm¼watt5%Resistor
R8,R9-5.6Kohm¼watt5%Resistor
R10-10Kohm¼wattResistor
R11-2.2Kohm¼wattResistor
R12-100KohmhorizontalPotmountedonPCboard
R13-20KohmhorizontalPotmountedonPCboard
R19-33Kohm¼watt5%Resistor
R14-75Kohm¼watt5%Resistor
R15*-R17*-25KohmSlidePot
R18*-5KohmSlidePot
R21-680ohm5Resistor10PinSIP
R23-200ohm¼watt5%Resistor
R20,R24,R25,R33*.R34*-47K¼watt5%Resistor
R26-0Ohms(Pieceofwire)
R28-22Kohm5Resistor10pinSIP
R29*-10KPotwithSwitch(Usedforvolumecontrol)
R31-1Kohm¼wattResistor
R32-33Kohm¼watt5%resistor
U1,U5- Tl074orJRC2060;U2-74HC00;
U3-74LS123;U4-74HC4053;U6-LM386-1
FRONTPANEL CONTROLS
(7)NoisegateLevel(R19)
(8)NoiseGateDelay(R20)
(9)MicGainLED(LED2)
Thisslidepot.worksonlywhenthenoisegateison. Thispot.
setsthelevelatwhichbackgroundnoisewillbenotgatedtothe
audiooutput.Pushingthiscontrolupwillmaketheunitless
sensitivetohigherbackgroundambientnoise.Pushingthis
controldownwillmaketheunit,moresensitivetobackground
noise.
Thiscontroladjuststhelengthoftimeaudiowillbegatedtothe
outputafterthenoisegatehasautomaticallyturnedoff(Noisegate
LEDoff).Pushingthedelayslidepot.upincreasesthedelay
(decay)time.Pushingthepot.downdecreasesthedelaytime.
ThisLEDisusedtohelpadjusttheMICInGainpot.Whenthe
LEDgoesonthisindicatesthattheEQisbeingoverdriven.
ThisLEDshouldnevergoon.
-9-
-20-
PRELIMINARY EQUALIZERSETTINGS
-10-
(10)MicSelect(S4)
(11)MicInput(J8)
ThisthreepositionswitchselectstheICOM,KENWOODor
YAESUmicrophonepluggedintothe8pinMicInputJ8(11).
8Pinmicrophonemaleconnector.Donotusethisconnector
whenMicinJ6(13)orMicInJ9(12)arebeingused.
REARPANEL CONTROLS
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
11
14 16 19
13 17 18
15
10
12
The controlsetsthedecaytimeofthetrailing
edgeofthe Audio,whenthenoisegateturnsoff. This
circuitryexponentiallyreducestheaudiooutputwhenthereisno
audiopresentinthe .(Thedelaycircuitryhelpstomakethe
transitionsofgatingandnotgatingofaudiosmoothandmore
pleasingtotheear.) Thedurationoftheexponentialdecay
isdependentonthesettingofthe control. The
delaycontrolsetataminimumvalue(theslidepotalltheway
down)willexponentiallydecaytheaudioinabout100milliseconds.
Thedelaycontrolsetatamaximumvaluewillallowtheaudioto
decayoverafewseconds.Ontheairtestsshowthewhitebarpart
oftheNoiseGateDelayrangegivesverypleasingaudiotransitions.
(decaytimeofabout.3to.5second). Youcanexperimentonyour
owntofindthebestsettingforyou.
Ifyouhavemedium-to-highlevelsofambientnoisepresentwhen
youaretransmitting,withthe intheoff
position,whenyoustoptalkingyourpowermeterwillindicateR.F.
stillbeingtransmitted.(setpowermeteronavg.powertodothis
experiment).Whenthenoisegateisturnedonandproperly
adjustedwhenyoustoptalkingthepoweroutputwilldroptothe
bottomofthescale(nopoweroutput).Peoplewholistentoyour
signalwillbeabletohearthedifferenceandtheywillwonderwhere
thenoisewent.
Turnthe on.Setall8equalizerslide
potentiometerstothe0dbpoint(markedonthecase).Refertothe
PreliminaryEqualizerSettingtableonpage20.Usethistable,asa
guidetodetermineinitialstartingpointsforequalizersettings.Itis
suggestedthatthephonesmonitorbeutilizedtoassistinadjusting
theequalizer. Asyoumodifyyourequalizersettings(todeterminewhat
theoptimalsettingisforyou)itisrecommendedthatyoumake
changesstartingatthehighestaudiofrequency(3200Hz)firstand
changethenextlowestfrequency(band)nextuntilthelowestfrequency
(50hz)isadjusted.Ontheairexperimentationwillberequired
tofindtheoptimalsettingsbasedupontheusersvoice
characteristicsandbandconditions.
NoiseGateDelay
MicOut
MicIn
NoiseGateDelay
NoiseGateSwitch
EqualizerSwitch
AdjustingThe AudioEqualizer
-19-
GETTINGSTARTEDTUTORIAL
REARPANEL CONTROLS
-11-
(12)MICInput(J9)
(13)MicInput(J6)
This3pinXLRfemaleconnectorworksindependent
ofthemicselectswitchandmaybeusedasanothermicsource.
DonotusethisconnectorwhenMicInJ6orJ8isbeingused.
ThisRCA femaleconnectorisusedasanauxiliary
microphoneinput. Thisconnectorworksindependentofthemic
selectswitchandmaybeusedforanotheraudiosourceor
microphone. Thisinputisalsolowimpedance.Donotuseifmic
isconnectedtoJ8(11)orJ9(12).
(14)PTTINPUT(J7)
(15)MICOutSelect A/B(S4)
(16)MicOutput A (J5)
RCA femaleconnectorforauxiliarypushtotalkcontrol. A foot
switchorothercontrolmaybeconnectedtothisconnector.
Groundingthecenterjackoftheconnectorgroundsthepush
totalklineontheMicOut.
Thistwopositionslideswitchdirectsaudiotothe5PinDIN
MicOut A (16)orthe5PinDINMicOutB(17).
5PinfemaleDINconnectorthathasnoisegate/equalizer
audiopluspushtotalkoutputted. Thisconnectorisactive
onlywhentheMicOutSlideSwitchS4(15)isinthe
MicOutSelect A position.
XLR PIN Description.
1 gnd. / shield
2 + Mic
3 - Mic
-18-
Beforepluggingthepowertransformer intothewallpreset the
followingcontrols as indicated:
and switches alloff.
toselectmicrophone you willbeusing.
Connect your microphone intothe rearconnector.Plugthe
powertransformer (module)intothewallandintothe
connectoroftheunit. Attach themicrophone cable betweenyour
transceiver/transmitterandthe oftheunit.Ifthemicrophone
beingused is anelectret mic (ICOMHM12,SM6,...)andrequires
D.C.onthemic lineplugtheshorting jumpersupplied ontothe
pins atthebottomofthecaseotherwise leave itoff. Turn
the switchon. Theorange/yellow should goon.
,using ascrewdriver,turnthe
(located atthebottomoftheunit)clockwise
untilthe just goes on.NowturntheMic inLevel control
counterclockwise suchthat whenyou
speak intothemic.
,using ascrewdriver,turnthe
control clockwiseuntiltheaudiolevel, as shown by
your transceiver's/ transmitters meteringis attheproperlevel. If
you areusing push totalk onyour transceiver you willhave to
push thePTT switchonyour microphone whilemaking this
adjustment.
Turnthe on.(Please notethatwhenthe
is offthe should always go
onindicating audiois beingsent /gatedtothe .Whenthe
is turnedonthe may beon
oroffdependingontheposition ofthe control
andthe audiolevel.) Adjust theNoise GateLevel control until
theNoise GateLEDjust goes off.
(Ifaudiois coming fromyour
transceiver's/ receiver's speakeryou should turnofftheaudio.)
Whenyou nowtalk intoyour microphone the
should goonindicating audiois beingsent tothe When
you stop talking the should turnoffindicating
thataudiois notbeingsent andbackgroundnoise is notbeing
sent /gatedtothe .
Power,Equalizer NoiseGate
MicSelect
MicIn
Power
MicOut
MIC
Jumper
Power PoweronLED
MicInLevelControl
MicLED
MicOutLevel
NoiseGateSwitch
NoiseGateSwitch NoiseGateLED
MicOut
NoiseGateSwitch NoiseGateLED
NoiseGateLevel
MicIn
NoiseGateLED
MicOut.
MicOutLED
MicOut
AdjustingtheMicLevels
theLEDnevergoeson
Whiletalking intothemicrophone
Whiletalking intothemicrophone
This adjustment should bemade
withthelevel ofambientnoise thatwillbepresent whenyou will
betalking intothemicrophone.
NoiseGate Adjustments
GETTINGSTARTEDTUTORIAL
-12-
(18)Phones(J3)
(19)Power
1/4“Stereoheadphoneconnectorusedtomonitoraudiofrom
theequalizer. Theoutputlevelofthisconnectoriscontrolledby
phonevolumecontrolR29(1)
(Aninlineadapter
shouldbeusedwithheadsetsthatdonotuse1/4“stereo
connectors.StoreslikeRadioShackhaveaudioplugadapters
available.)
5PinDinconnector.7-14VDCinputat100ma.
Headphonesusingotherthan
1/4“stereoconnectorsmaynotoperateproperlywhen
pluggedintostereophonesconnectorJ3.
+7to14V
GND
Power
5PinMaleDIN
Dinconnectorsshown
onsidetobesoldered
(17)MicOutputB(J4)
5PinfemaleDINconnectorthathasnoisegate/equalizer
audiopluspushtotalkoutputted. Thisconnectorisactive
onlywhentheMicOutSlideSwitchS4(15)isintheMicOut
selectBposition.
Gnd
PTT
-Mic
+Mic Balanced
Output
Hi-ZOutput
MICOUT A/B
5PinMaleDIN
Dinconnectorsshown
onsidetobesoldered
REARPANEL CONTROLS
-17-
C2-.1uf
100Hertz
C1-.01uf
7
R1
3.3K R2
3.3K
R5-100K
U2b
TL074
+
-
R6
100K
R3
1M R4
1M
EachEQbandpassfilterisverysimilar.Thecenterfrequencies,ofeach
bandpassfilterisdeterminedbythevaluesofthecapacitorsand
resistorsused.Theequationsbelowdefinewhatcapacitorvaluesare
requiredforagivencenterfrequency.Belowisaschematicofa
bandpassfilterwithacenterfrequencyof100Hz.
C1=(.9046)/(FreqinHz.)<=Inuf=>C2=C1x10
Theaboveequationsarevalidforonlytheresistorvaluesshowninthe
schematicabove.
Thebandpassfilterintheschematichasacenterfrequencyat100hz.
example:Thecapacitorvaluesrequiredtoobtainabandpassfiltercenter
frequencyof4800hziscalculatedasfollows:
C1=.9046/FREQ=.9046/4800=,0001885UF=188.5PF
C2=C1x10=.0018858uf
Theclosestrealvaluecapacitorsthatcanbepurchasedareasfollows
-C1calculatestobe188.5pf.Theclosestrealvaluethat
canbepurchasedis180pf
-C2calculatestobe.001885uf.Theclosestrealvaluethat
canbepurchasedis.0018uf
CHANGINGEQBANDPASS
FILTERCENTERFREQUENCIES
BOTTOMPANEL CONTROLS
(20)MicJumper
(21)MicInGain(R12)
Microphonecartridgeswith
verylowoutput(LikeaHeilHC4orHeilHC5)mayrequire
theMicInGainControltobeadjustedtomaximumgain.
(22)MicOutputLevel(R13)
(23)MicInputImpedance
Pluggingthejumper(shortingblock)puts+5VontheMicIn
lineofthemicrophone'scartridge(11,12&13).Requiredformic's
suchasICOM’sHm12,HM36andSm6andtheHeilHmiandMH2
(madefortheElecraftradio’s)andotherelectretmicrophones.
Thispot.,whenturnedclockwise,increasesthemicrophone
amplifier'sgain. Thegainshouldbechangedwhilespeaking
intomicrophoneuntilMicLED(10)justbarelygoesonNow
turnthepotcounterclockwise,whilespeakingintothemictil
theLEDNEVERgoeson.(TheLEDgoingonindicatesthat
theEQisbeingoverdriven.)
Changestheunit'saudiooutput.(Clockwiserotationincreases
output.)
Insertionofoneofthesejumpers(shortingblocks)selects
200or600ohminputimpedance.
.
Nojumpersconnectedselects
highimpedance
-13-
20 23 21
22
8 Band Equalizer Pot Board with Noise Gate Pots
Audio IN
C7 - .0039 uf
U3b
TL074
7
C2
390 pf
C20 - 100 uf C16 - .1 uf R1
10
R16 - 100 K
R8f
100 K
R17 - 100 K
R21g
1M
R23c
1M
R4g
3.3K
R6b
3.3K R6c
3.3K
+5 V
U3c
TL074
+
10
9
8
-
+R2
1K R3
1K
R8G
100 K
R23b
1 M
8
8
8
16
5
2
315
6
1
71
4
3
1
4
3
C17 -.18uf C15 - .1uf C14 - .047uf C13 - .022uf
400 Hertz
C6
.0022uf
200 Hertz
100 Hertz
C10 - .01uf
C8 - .0047uf
R8a
100K
+5V
1
35
6
7
2
R7
14.3K
1%
R4b
3.3K R5b
3.3K
R4c
3.3K
R5c
3.3K
R4d
3.3K
R14 - 100 K
R21d
1M
R22c
1M
R21c
1M R8c
100K
R21A
1M
R22a
1M
R11 - 100 K R12 - 100 K R13 - 100 K
C12 - .018uf
U1a
TL074
U2a
TL074
U2b
TL074
U2c
TL074
+
++
13
12
+
10
9
8
---
C9 - .0056 uf
C11 - .012 uf
C5 - .003 uf
2400 Hertz
3200 Hertz
1600 Hertz
800 Hertz
R9
10K
R10
10K
C19
4.7 uf
+5V
4
11 1
3
2
C18
4.7 uf
+
+
-
R8b
100K
R21B
1 M R22b
1 M
R5a
3.3K 1
1
1
2
2
1
1
4
3
2
1
3
3
4
4
3
3
3
53
1
1
4
4
4
1
1
1
5
6
2
56
31
1
2
2
2
R8d
100K
R22d
1M
50 Hertz
U2d
TL074
U3a
TL074
+14
+
3
21
+5V
+
6
5
-
--
C1
300 pf
J1-7
J1-6
R15 - 100 K
R21e
1 M
R23a
1 M
R4e
3.3K
R6a
3.3K
R8e
100 K
R21h
1M R23d
1M
R4f
3.3K R6d
3.3K
J1- 12
J1- 4
J1- 5
J1- 9
R4h
3.3K
R18 - 100 K
R20 - 5K
R19 - 100 K
C3
560 pf
C4
.0012 uf
U3d
TL074
14
13
12
+
-
Audio Out
+ 5V
GND
R8h
100 K
R21f
1 M
R5d
3.3K
R4a
3.3K 1
5
5 7 8
1
2
8
7
19
9
9
1
18
7
31
2
7
82
3
1
1
3
2
1
7
7
1
1
6
6
6
2
3
2
1
2
1
2
1
3
1
1
1
1
1
23
J1-10
J1-11
Noise Gate
Delay Control
Noise Gate
Level Control
Note: Slide Pots are mounted on Pin side of the board
Julius Jones REV 1 6 -14-99 Note: J1 goes to a 16 pin DIP socket
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W2IIHY W2IHY Operating instructions

Brand
W2IIHY
Model
W2IHY
Category
Network switches
Type
Operating instructions
This manual is also suitable for

W2IIHY W2IHY is a flexible and powerful 8-band audio equalizer, noise gate, and microphone preamplifier designed for amateur radio use. With W2IIHY, you can easily improve the sound quality of your transmitted audio, reduce background noise, and boost your microphone signal. The device features:

  • 8-band graphic equalizer with adjustable center frequencies and +/-16dB of gain
  • Noise gate with adjustable threshold and release time
  • Microphone preamplifier with adjustable gain
  • Balanced XLR and unbalanced RCA microphone inputs
  • Balanced XLR and unbalanced RCA line outputs
  • 5-pin DIN microphone output connector
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