Velleman K8010 User Manual
Total solder points: 600
MONO PURE CLASS A VALVE
Difficulty level:
beginner 1o 2o 3o 4o 5þ advanced
POWER AMPLIFIER
⇒ Pure CLASS A valve sound with high quality KT88 valves
⇒ High quality chrome plated enclosure
⇒ Chrome plated valve socket covers
⇒ Easy bias adjustment with LED indication
⇒ Removable bottom for easy access and service
K8010
⇒ High quality capacitors and components
⇒ Gold plated input and speaker terminals
⇒ Standby function
⇒ Soft start circuit for power transformer
⇒ Sensitivity adjustment for exact matching of two mono amps
Specifications
• Full class A 65Wrms in 4 or 8Ω
• Bandwidth: 4Hz to 90KHz (-3dB/1W)
• Harmonic distortion: 0.1% @ 1W/1KHz
• Signal to noise ratio: >110dB (A weighted)
• Input sensitivity: 1Vrms (adjustable)
• Power supply: 100, 120, 230 or 245VAC
• Power consumption: 230VA max.
• Dimensions: 355W x 360D x 157H
• Weight: 14Kg / 31lb
modifications reserved
MANUAL H8010P-ED1
5%
1
2
3
4
5
6
7
8
9
A
B
1%
COLOR= 2… 5
4K7= ( 4 - 7 - 2 - B )
4K7= ( 4 - 7 - 0 - 1 - 1 )
I P E SF S DK N D GB F NL
CODICE
C
COLORE
O
D
E
CODIGO
DE
CORES
CODIGO
DE COL-
ORES
VÄRI
KOODI
FÄRG
SCHEMA
FARVE
KODE
FARGE
KODE
FARB
KODE
COLOUR
CODE
CODIFICATION
DES
COU-
LEURS
KLEUR
KODE
0
Nero Preto Negro Musta Svart Sort Sort Schwarz Black Noir Zwart
Marrone Castanho Marrón Ruskea Brun Brun Brun Braun Brown Brun Bruin
Rosso Encarnado Rojo Punainen Röd Rød Rød Rot Red Rouge Rood
Aranciato Laranja Naranjado Oranssi Orange Orange Orange Orange Orange Orange Oranje
Giallo Amarelo Amarillo Keltainen Gul Gul Gul Gelb Yellow Jaune Geel
Verde Verde Verde Vihreä Grön Grøn Grønn Grün Green Vert Groen
C
O
D
E
0
1
2
3
4
5
Blu Azul Azul Sininen Blå Blå Blå Blau Blue Blue Blauw
Viola Violeta Morado Purppura Lila Violet Violet Violet Purple Violet Paars
Grigio Cinzento Gris Harmaa Grå Grå Grå Grau Grey Gris Grijs
Bianco Branco Blanco Valkoinen Vit Hvid Hvidt Weiss White Blanc Wit
Argento Prateado Plata Hopea Silver Sølv Sølv Silber Silver Argent Zilver
Oro Dourado Oro Kulta Guld Guld Guldl Gold Gold Or Goud
6
7
8
9
A
B
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TECHNICAL DATA*
• Output power: 65 Wrms class A / 85Wrms maximum
• Output impedance 4 or 8 Ohm
• Ultra linear output transformer
• Switch-on delay, to protect the output tubes: approx. 1 minute
• Standby circuit
• Built-in bias current indicator
• Switch-on delay for the supply transformer : 0.5s
• Power bandwidth: 8Hz - 45kHz (-3dB, ref. 50W)
• Frequency range: 4Hz - 90kHz (-3dB, ref. 1W)
• Harmonic distortion:
0.1% (1 kHz/1W)
0.7% (1 kHz/65W)
• Signal/noise ratio: > 110dB (A weighted wrt 85W)
• Input impedance: 100Kohm
• Input sensitivity min 1Vrms, adjustable.
• Damping factor (100Hz): > 12
• Power supply: 100, 120, 230, 245VAC
• Power consumption: 230Wmax. / 66W standby
• Dimensions: 355W x 360D x 157H
*Modifications and typographical errors reserved
3
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1. Assembly (Skipping this can lead to troubles ! )
Ok, so we have your attention. These hints will help you to make this project successful.
Read them carefully.
1.1 Make sure you have the right tools:
• A good quality soldering iron (25-40W) with a small tip.
• Wipe it often on a wet sponge or cloth, to keep it clean;
then apply solder to the tip, to give it a wet look. This is
called ‘thinning’ and will protect the tip, and enables you
to make good connections. When solder rolls off the tip, it needs cleaning.
• Thin raisin-core solder. Do not use any flux or grease.
• A diagonal cutter to trim excess wires. To avoid injury when cutting excess leads,
hold the lead so they cannot fly towards the eyes.
• Needle nose pliers, for bending leads, or to hold components in place.
• Small blade and phillips screwdrivers. A basic range is fine.
For this projects, a basic multi-meter is required
1.2 Assembly Hints :
þ Make sure the skill level matches your experience, to avoid disappointments.
þ Follow the instructions carefully. Read and understand the entire step before you perform each op-
eration.
þ Perform the assembly in the correct order as stated in this manual
þ Position all parts on the PCB (Printed Circuit Board) as shown on the drawings.
þ Values on the circuit diagram are subject to changes.
þ Values in this assembly guide are correct*
þ Use the check-boxes to mark your progress.
þ Please read the included information on safety and customer service
* Typographical inaccuracies excluded. Always look for possible last minute manual updates, indicated
as ‘NOTE’ on a separate leaflet.
1.3 Soldering Hints :
0.000
Mount the component against
the PCB surface and carefully
solder the leads
4
Make sure the solder joints are
cone-shaped and shiny
Trim excess leads as close as
possible to the solder joint
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ASSEMBLY OF THE MAIN PCB P8010:
Foreword:
For best results and easy handling of the large PCB (Printed Circuit Board), we will start by putting the
four large valve sockets in place. This will allow us to rest the board on the bench, without having the
component leads touching the bench surface.
When the component leads are put in the appropriate holes on the PCB, we recommend to gently bend
the leads outwards, so they stay on the board when it is flipped over to apply solder. You gain a reasonable amount of time if you put approx. 10 components in place every time, before you flip the board,
and make the solder joints.
5
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VALVE SOCKET
Also mount a 15 mm spacer on the following holes in
2718543
V...
Connect the valve socket terminals 1, 3, 4, 5, and 8 to the corresponding
1. VALVE SOCKET MOUNTING
Check the position of the notch in the centre of the valve socket, it must correspond to the position of the
notch in the circle printed on the PCB. Connect the leads to the corresponding isles on the PCB using a
small piece of supplied jumper wire.
IMPORTANT:
Make the connection exactly as shown in the illustration, otherwise the small piece of wire could touch
the bottom of the cabinet, see further.
the PCB (at the solder side); use a 6 mm M3 bolt:
q A spacer next to TRAFO1
q A spacer next to SK15
q A spacer next to SK6
q A spacer next to R62
q A spacer next to V6
20mm M3 BOLT
12mm SPACER
PCB
6mm M3 BOLT
15mm M3 SPACER
q V1
q V2
q V3
q V4
15mm M3 SPACER
5
4
6
7
5
4
3
3
8
1
2
8
1
points at the solder side of the PCB.
Use a piece of supplied jumperwire. Mount the wire in such way that it cannot touch the bottom of the cabinet. (see above illustration).
6
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D
C
B
A
DCB
A
D
C
B
A
DCB
A
2. JUMPERS
Note that for J1 to J4, two jumper wires have
to be mounted in the same hole, for extra current handling.
TIP
In order to get nice straight wiring, without too
much folding and measuring, follow these
hints:
• Put the jumper wire in place.
• Solder one end of the lead.
• Then carefully pull on the free end of the
q J1 (mount 2 wires in the same hole)
q J2 (mount 2 wires in the same hole)
q J3 (mount 2 wires in the same hole)
q J4 (mount 2 wires in the same hole)
q J5
q J6
q J7
q J8
q J9
q J10
q J11
q J12
q J13
q J14
q J15
q J16
q J17
q J18
q J19
q J20
q J21
q J22 indicated with ‘F1’
(mount 2 wires in the same hole)
3. JUMPERS FOR AC POWER SELECTION
For 100V input (mains), mount:
q JA at the voltage selection 1
q JA at the voltage selection 2
For 115V - 120V input, mount:
q JB at the voltage selection 1
q JB at the voltage selection 2
7
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DCB
A
DCB
A
DCB
A
For 220V - 230V input, mount:
q JC at the voltage selection 1
D
C
B
A
q JC at the voltage selection 2
For 240V -245V mains input, mount:
q JD at the voltage selection 1
q JD at the voltage selection 2
REMARK:
Strike out the NOT used mains voltage indica-
tion at the back of the enclosure !! Use a per-
manent black marker
4. DIODES (Check the polarity!)
D...
CATHODE
q D1: 1N4148
q D2 :1N4148
q D3: 1N4007
q D4: 1N4148
q D5: 1N4007
q D6: 1N4148
q D7: 1N4148
q D8: 1N4148
q D9: 1N4007
q D10: 1N4007
q D11: 1N4007
q D12: 1N4007
q D13: 1N4007
q D14: 1N4007
q D15: 1N4007
q D16: 1N4007
q D17: 1N4007
q D18: 1N4007
q D19: 1N4007
q D20: 1N4007
q D21: 1N4007
q D22: 1N4007
q D23: 1N4007
q D24: 1N4148
q D25: 1N4148
q D26: 1N4148
q D27: 1N5408 not on tape !
q D28: 1N5408 not on tape !
q D29: 1N5408 not on tape !
q D30: 1N5408 not on tape !
8
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5. ZENER DIODES
(Check the polarity!)
ZD...
CATHODE
q ZD1: 3V9
q ZD2: 3V9
6. ¼W & ½W RESISTORS
R...
q R1: 470 (4 - 7 - 1 - B)
q R2: 220K (2 - 2 - 4 - B)
q R3: 2K2 (2 - 2 - 2 - B)
q R4: 2K2 (2 - 2 - 2 - B)
q R5: 220K (2 - 2 - 4 - B)
q R6: 100K (1 - 0 - 4 - B)
q R7: 1K (1 - 0 - 2 - B)
q R8: 1K (1 - 0 - 2 - B)
q R9: 22K (2 - 2 - 3 - B)
q R10: 3.3 (3 - 3 - B - B - 9)
q R11: 3K9 (3 - 9 - 2 - B)
q R12: 1K5 (1 - 5 - 2 - B)
q R13: 1M (1 - 0 - 5 - B)
q R14: 1M (1 - 0 - 5 - B)
q R15: 1K (1 - 0 - 2 - B)
q R16: 47K (4 - 7 - 3 - B)
q R17: 470K (4 - 7 - 4 - B)
q R18: 680 (6 - 8 - 1 - B)
q R19: 3K9 (3 - 9 - 2 - B)
q R20: 10K (1 - 0 - 3 - B)
q R21: 10K (1 - 0 - 3 - B)
q R22: 1K5 (1 - 5 - 2 - B)
q R23: 1K2 (1 - 2 - 2 - B)
q R24: 560 (5 - 6 - 1 - B)
q R25: 100K (1 - 0 - 4 - B)
q R26: 220K (2 - 2 - 4 - B)
q R27: 100K (1 - 0 - 4 - B)
q R28: 220K (2 - 2 - 4 - B)
q R29: 10K (1 - 0 - 3 - B)
q R30: 2K7 (2 - 7 - 2 - B)
q R31: 1M5 (1 - 5 - 5 - B)
q R32: 1K5 (1 - 5 - 2 - B)
q R33: 3.3 (3 - 3 - B - B)
q R34: 8K2 (8 - 2 - 2 - B)
q R35: 220K (2 - 2 - 4 - B)
q R36: 10K (1 - 0 - 3 - B)
q R37: 100K (1 - 0 - 4 - B)
q R38: 220K (2 - 2 - 4 - B)
q R39: 100K (1 - 0 - 4 - B)
q R40: 220 (2 - 2 - 1 - B - 9)
q R41: 100K (1 - 0 - 4 - B - 9)
q R42: 47K (4 - 7 - 3 - B - 9)
q R43: 220 (2 - 2 - 1 - B - 9)
q R44: 220 (2 - 2 - 1 - B - 9)
q R45: 220 (2 - 2 - 1 - B - 9)
q R46: 2K2 (2 - 2 - 2 - B - 9)
q R47: 27K (2 - 7 - 3 - B - 9)
q R48: 220 (2 - 2 - 1 - B - 9)
q R49: 220 (2 - 2 - 1 - B - 9)
q R50: 100K (1 - 0 - 4 - B - 9)
q R51: 330K (3 - 3 - 4 - B - 9)
q R52: 330K (3 - 3 - 4 - B - 9)
q R53: 330K (3 - 3 - 4 - B - 9)
q R54: 330K (3 - 3 - 4 - B - 9)
9
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