Velleman-Kit K4307 User manual

Total solder points: 111
Difficulty level:
beginner 1o2þ3o4o5oadvanced
PARTLIST H4307P-ED1
K4307
LED AUDIO POWER METER
þ10 x LED scale, up to 2000Wrms power measurement.
þNo power supply needed, directly driven from the loudspeaker output.
þFour display windows included:
1. from 0.15W to 200W at 8Ωspeaker, low power mode.
2. from 0.3W to 400W at 4Ωspeaker, low power mode.
3. from 5W to 1000W at 8Ωspeaker, high power mode.
4. from 10W to 2000W at 4Ωspeaker, high power mode.
þIdeal for car audio systems and P.A. systems
þCan also be used with bridged power amplifiers.
þAluminium front panel included for easy panel mounting inside
speaker cabinet.
þHorizontal or vertical mounting possibility.
Specifications
•Scale at 4Ωload in low power mode:
0.3 -1 -2 -4 -10 -20 -50 -100 -200 -400W
•Scale at 4Ωload in high power mode:
10 -20 -40 -60 -120 -200 -400 -700 -1100 -2000W
•Scale at 8Ωload in low power mode:
0.15 -0.5 -1 -2 -5 -10 -25 -50 -100 -200W or
•Scale at 8Ωload in high power mode:
5 -10 -20 -30 -60 -100 -200 -350 -550 -1000W
•Minimum input sensitivity: 1.1Vrms (low power mode)
•Maximum input voltage: 130Vpeak (high power mode)
•Current consumption: 25mA at full scale
•Luminous intensity: 8 to 20mcd / led
•Dimensions (W x L x H): 120 x 40 x 28mm
modifications reserved

5%
4K7= ( 4 - 7 - 2 - B )
1%
4K7= ( 4 - 7 - 0 - 1 - 1 )
COLOR= 2… 5
IPESF SDK NDGB FNL
C
O
D
E
CODICE
COLORE
CODIGO
DE
CORES
CODIGO
DE COL-
ORES
VÄRI
KOODI FÄRG
SCHEMA
FARVE
KODE FARGE KODE FARB KODE
COLOUR
CODE CODIFI-
CATION
DES
COU-
LEURS
KLEUR
KODE
C
O
D
E
0
Nero Preto Negro Musta Svart Sort Sort Schwarz Black Noir Zwart 0
1
Marrone Castanho Marrón Ruskea Brun Brun Brun Braun Brown Brun Bruin 1
2
Rosso Encarnado Rojo Punainen Röd Rød Rød Rot Red Rouge Rood 2
3
Aranciato Laranja Naranjado Oranssi Orange Orange Orange Orange Orange Orange Oranje
3
4
Giallo Amarelo Amarillo Keltainen Gul Gul Gul Gelb Yellow Jaune Geel 4
5
Verde Verde Verde Vihreä Grön Grøn Grønn Grün Green Vert Groen 5
6
Blu Azul Azul Sininen Blå Blå Blå Blau Blue Blue Blauw 6
7
Viola Violeta Morado Purppura Lila Violet Violet Violet Purple Violet Paars 7
8
Grigio Cinzento Gris Harmaa Grå Grå Grå Grau Grey Gris Grijs 8
9
Bianco Branco Blanco Valkoinen Vit Hvid Hvidt Weiss White Blanc Wit 9
A
Argento Prateado Plata Hopea Silver Sølv Sølv Silber Silver Argent Zilver
A
B
Oro Dourado Oro Kulta Guld Guld Guldl Gold Gold Or Goud
B

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3
ASSEMBLY STEPS
Required tools to assemble the kit:
Use a small soldering iron of max. 40W.
Use thin (1mm) solder, do not use any flux.
Use a small cutter to trim the excess wires.
1.
2. 3. 4.
Mount the compo-
nents against the
PCB surface and
carefully solder the
leads in place.
Obtain cone-shaped,
shiny soldered joints
by heating up the
component leads suf-
ficiently.
This solder joint
results in a bad
connection.
Trim the excess
wires up to the
level of the sol-
der
•Careless assembly will certainly lead to problems.
•Insert the part, oriented correctly, into its correct holes in the PCB.
•Mount the components in the correct order as stated in this manual.
•Watch out for important remarks.
•The component values in the circuit diagram are for reference only.
The values in this parts list are correct and must be followed.
•Use the boxes qto check off your progress.
FBefore starting to build, read also the general guidelines
1. DIODES (Check the polarity!)
D...
CATHODE
qD1: BAT85
qD2: 1N4148
qD3: 1N4148
qD4: 1N4007
qD5: 1N4007

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4
2. ZENER DIODES
(Check the polarity!)
ZD...
CATHODE
qZD1: 2V4
qZD2: 3V9
qZD3: 6V8
qZD4: 10V
qZD5: 18V
qZD6: 27V
qZD7: 36V
qZD8: 51V
3. ¼W RESISTORS
R...
qR1: 470 (4 -7 -1 -B)
qR2: 150 (1 -5 -0 -B)
qR3: 150 (1 -5 -0 -B)
qR4: 150 (1 -5 -0 -B)
qR5: 150 (1 -5 -0 -B)
qR6: 150 (1 -5 -0 -B)
qR7: 150 (1 -5 -0 -B)
qR8: 150 (1 -5 -0 -B)
qR9: 150 (1 -5 -0 -B)
qR10: 150 (1 -5 -0 -B)
qR11: 150 (1 -5 -0 -B)
qR12: 150K (1 -5 -4 -B)
4. PCB PINS
qLS
qLS
5. TRANSISTORS
T...
qT1: MPSA92 or 2N5401
qT2: MPSA42 or 2N5551
qT3: BC546B
qT4: BC546B
qT5: BC546B
qT6: BC546B
qT7: BC546B
qT8: BC546B
qT9: BC546B
qT10: BC546B
qT11: BC546B

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5
6. ELECTROLYTIC CAPACITOR
(Check the polarity!)
C...
qC1: 47µF/63V
qC2: 47µF/63V
7. Mode setup
Depending on the resistor mounted for R13, a measurement selection
can be made.
The power meter may be set up for low power measurements (typical
consumer amplifiers) or for high power measurement, this mode can be
used in high power P.A. systems.
R...
qR13: 10 / 1/4W (1 -0 -0 -B) for low power mode.
qR13: 1K / 1W (1 -0 -2 -B) for high power mode.

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6
8. LED’s (Check the polarity!)
Mount the LED exactly like in the drawing:
COLOR= 2...5
LD...
CATHODE
18mm
qLD1: 3mm red, low current L-934LSRD (2)
qLD2: 3mm red, low current L-934LSRD (2)
qLD3: 3mm red, low current L-934LSRD (2)
qLD4: 3mm red, low current L-934LSRD (2)
qLD5: 3mm red, low current L-934LSRD (2)
qLD6: 3mm red, low current L-934LSRD (2)
qLD7: 3mm red, low current L-934LSRD (2)
qLD8: 3mm red, low current L-934LSRD (2)
qLD9: 3mm red, low current L-934LSRD (2)
qLD10: 3mm red, low current L-934LSRD (2)
Tip: For easy mounting at the correct height, you can first mount the
front panel on the PCB (see next point), then:
1.Insert the LED (watch the polarity).
2.Turn over the unit with the front panel on a flat surface.
3.Let the LED touch the table surface.
4.Solder the connections.

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7
9. MOUNTING THE FRONT PANEL
A.Mount the suitable spacers:
Pass the bolts through the conical holes of the front panel and put the
spacers over it before tightening them with nuts.
30mm M3 COUNTERSUNK-HEAD BOLT
M3 NUT
15mm PLASTIC SPACER
15mm PLASTIC SPACER
1.5mm FRONT PANEL
M3 NUT
30mm M3 COUNTERSUNK-HEAD BOLT
FRONT PANEL
B.Mount the PCB onto the spacers:
Fix the PCB on the front panel by using two lock washers and nuts.
Check the LED’s position and correct if necessary by heating the sol-
der points.
1.5mm FRONT PANEL
LOCK WASHER
15mm PLASTIC SPACER
30mm M3 COUNTERSUNK-HEAD BOLT
M3 NUT
M3 NUT
PCB
M3 NUT
LOCK WASHER
PCB
C.Stick the display window:
Depending the loudspeaker impedance you have to mount the correct
front panel:
-for 8 Ohm speakers use the scale 0.15 to 200W or 5 to 1000W
-for 4 Ohm speakers use the scale 0.3 to 400W or 10 to 2000W
REMARK: IF YOU MOUNT THIS POWER METER INTO THE SPEAKER
CABINET, ENSURE THE METER STAYS COMPLETELY AIRTIGHT.

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8
10. CONNECTING
Connect the LS-leads in parallel with the loudspeaker or output of the
amplifier.
LS
POWER
METER
SPEAKER
LOUDSPEAKER
AUDIO POWER AMPLIFIER

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9
11. PCB
c
T10
R10
C2 C1
D4
LS
T5
LD5LD2 LD3LD1 LD4
e
c
D3
T3
R3
D5
bc c
T4
R4 R5
e
be b
ZD1 ZD2
a
LD6 LD7 LD8 LD9 LD10
R8
c c
T7T6
R6 R7
e
be b
ZD3 ZD4
c c
T8
R9
T9
e
be b
ZD5 ZD6
T1
R12 T2
R2
cc
R11 ZD8
T11
e
be
b
ZD7
P4307
D2
D1
e
cb
e
R1 c
b
R13
12. DIAGRAM
LD1
L-934LSRD
R1
470
MPSA92 T1
R12
150K
MPSA42
T2
R2
150
D1
BAT85
D2
1N4148
LD2
L-934LSRD
D3
1N4148
BC546B
T3
R3
150
LD3
L-934LSRD
BC546B
T4
R4
150
2V4
ZD1 3V9 ZD2
R5
150
BC546B
T5
LD4
L-934LSRD
6V8
ZD3
R6
150
BC546B
T6
LD5
L-934LSRD
10V
ZD4
R7
150
BC546B
T7
LD6
L-934LSRD
18V
ZD5
R8
150
BC546B
T8
LD7
L-934LSRD
27V
ZD6
R9
150
BC546B
T9
LD8
L-934LSRD
36V
ZD7
R10
150
BC546B
T10
LD9
L-934LSRD
51V
ZD8
R11
150
BC546B
T11
LD10
L-934LSRD
C1
47u/63V
C2
47u/63V
D4
1N4007
D5
1N4007
R13
10
LS
LS 0.15W
0.5W 1W 2W 5W 10W 25W 50W 100W 200W