Velleman K8010 User manual

Total solder points: 600
Difficulty level:
beginner 1o2o3o4o5þadvanced
MANUAL H8010P-ED1
MONO PURE CLASS A VALVE
POWER AMPLIFIER K8010
⇒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
⇒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

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 HvidHvidt 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

__________________________________________________________________________________________________________________________________________________________
3
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

_______________________________________________________________________________________________________________________________________________________
4
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 :
þMake sure the skill level matches your experience, to avoid disappointments.
þFollow the instructions carefully. Read and understand the entire step before you perform each op-
eration.
þPerform the assembly in the correct order as stated in this manual
þPosition all parts on the PCB (Printed Circuit Board) as shown on the drawings.
þValues on the circuit diagram are subject to changes.
þValues in this assembly guide are correct*
þUse the check-boxes to mark your progress.
þPlease 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 :
Mount the component against
the PCB surface and carefully
solder the leads
Make sure the solder joints are
cone-shaped and shiny Trim excess leads as close as possible to the solder joint
0.000

__________________________________________________________________________________________________________________________________________________________
5
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 reason-
able amount of time if you put approx. 10 components in place every time, before you flip the board,
and make the solder joints.

_______________________________________________________________________________________________________________________________________________________
6
15mm M3 SPACER
12mm SPACER
PCB
VALVE SOCKET
20mm M3 BOLT
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.
2
3
41
3
5
7
4
6
58
1
8
qV1
qV2
qV3
qV4
Also mount a 15 mm spacer on the following holes in
the PCB (at the solder side); use a 6 mm M3 bolt:
qA spacer next to TRAFO1
qA spacer next to SK15
qA spacer next to SK6
qA spacer next to R62
qA spacer next to V6
6mm M3 BOLT
15mm M3 SPACER
2
7
1
8
5
4
3
V...
Connect the valve socket terminals 1, 3, 4, 5, and 8 to the corresponding
points at the solder side of the PCB.
Use a piece of supplied jumperwire. Mount the wire in such way that it can-
not touch the bottom of the cabinet. (see above illustration).

__________________________________________________________________________________________________________________________________________________________
7
2. JUMPERS
qJ1 (mount 2 wires in the same hole)
qJ2 (mount 2 wires in the same hole)
qJ3 (mount 2 wires in the same hole)
qJ4 (mount 2 wires in the same hole)
qJ5
qJ6
qJ7
qJ8
qJ9
qJ10
qJ11
qJ12
qJ13
qJ14
qJ15
qJ16
qJ17
qJ18
qJ19
qJ20
qJ21
qJ22 indicated with ‘F1’
(mount 2 wires in the same hole)
3. JUMPERS FOR AC POWER SE-
LECTION
For 100V input (mains), mount:
qJA at the voltage selection 1
D
C
B
A
qJA at the voltage selection 2
D
C
B
A
For 115V -120V input, mount:
qJB at the voltage selection 1
D
C
B
A
qJB at the voltage selection 2
D
C
B
A
Note that for J1 to J4, two jumper wires have
to be mounted in the same hole, for extra cur-
rent 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
lead until it is straight, and apply solder.

_______________________________________________________________________________________________________________________________________________________
8
For 220V -230V input, mount:
qJC at the voltage selection 1
D
C
B
A
qJC at the voltage selection 2
D
C
B
A
For 240V -245V mains input, mount:
qJD at the voltage selection 1
D
C
B
A
qJD at the voltage selection 2
D
C
B
A
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
qD1: 1N4148
qD2 :1N4148
qD3: 1N4007
qD4: 1N4148
qD5: 1N4007
qD6: 1N4148
qD7: 1N4148
qD8: 1N4148
qD9: 1N4007
qD10: 1N4007
qD11: 1N4007
qD12: 1N4007
qD13: 1N4007
qD14: 1N4007
qD15: 1N4007
qD16: 1N4007
qD17: 1N4007
qD18: 1N4007
qD19: 1N4007
qD20: 1N4007
qD21: 1N4007
qD22: 1N4007
qD23: 1N4007
qD24: 1N4148
qD25: 1N4148
qD26: 1N4148
qD27: 1N5408 not on tape !
qD28: 1N5408 not on tape !
qD29: 1N5408 not on tape !
qD30: 1N5408 not on tape !

__________________________________________________________________________________________________________________________________________________________
9
5. ZENER DIODES
(Check the polarity!)
ZD...
CATHODE
qZD1: 3V9
qZD2: 3V9
6. ¼W & ½W RESISTORS
R...
qR1: 470 (4 -7 -1 -B)
qR2: 220K (2 -2 -4 -B)
qR3: 2K2 (2 -2 -2 -B)
qR4: 2K2 (2 -2 -2 -B)
qR5: 220K (2 -2 -4 -B)
qR6: 100K (1 -0 -4 -B)
qR7: 1K (1 -0 -2 -B)
qR8: 1K (1 -0 -2 -B)
qR9: 22K (2 -2 -3 -B)
qR10: 3.3 (3 -3 -B -B -9)
qR11: 3K9 (3 -9 -2 -B)
qR12: 1K5 (1 -5 -2 -B)
qR13: 1M (1 -0 -5 -B)
qR14: 1M (1 -0 -5 -B)
qR15: 1K (1 -0 -2 -B)
qR16: 47K (4 -7 -3 -B)
qR17: 470K (4 -7 -4 -B)
qR18: 680 (6 -8 -1 -B)
qR19: 3K9 (3 -9 -2 -B)
qR20: 10K (1 -0 -3 -B)
qR21: 10K (1 -0 -3 -B)
qR22: 1K5 (1 -5 -2 -B)
qR23: 1K2 (1 -2 -2 -B)
qR24: 560 (5 -6 -1 -B)
qR25: 100K (1 -0 -4 -B)
qR26: 220K (2 -2 -4 -B)
qR27: 100K (1 -0 -4 -B)
qR28: 220K (2 -2 -4 -B)
qR29: 10K (1 -0 -3 -B)
qR30: 2K7 (2 -7 -2 -B)
qR31: 1M5 (1 -5 -5 -B)
qR32: 1K5 (1 -5 -2 -B)
qR33: 3.3 (3 -3 -B -B)
qR34: 8K2 (8 -2 -2 -B)
qR35: 220K (2 -2 -4 -B)
qR36: 10K (1 -0 -3 -B)
qR37: 100K (1 -0 -4 -B)
qR38: 220K (2 -2 -4 -B)
qR39: 100K (1 -0 -4 -B)
qR40: 220 (2 -2 -1 -B -9)
qR41: 100K (1 -0 -4 -B -9)
qR42: 47K (4 -7 -3 -B -9)
qR43: 220 (2 -2 -1 -B -9)
qR44: 220 (2 -2 -1 -B -9)
qR45: 220 (2 -2 -1 -B -9)
qR46: 2K2 (2 -2 -2 -B -9)
qR47: 27K (2 -7 -3 -B -9)
qR48: 220 (2 -2 -1 -B -9)
qR49: 220 (2 -2 -1 -B -9)
qR50: 100K (1 -0 -4 -B -9)
qR51: 330K (3 -3 -4 -B -9)
qR52: 330K (3 -3 -4 -B -9)
qR53: 330K (3 -3 -4 -B -9)
qR54: 330K (3 -3 -4 -B -9)

_______________________________________________________________________________________________________________________________________________________
10
7. 1W RESISTORS
R...
2mm
qR55: 270 (2 -7 -1 -B)
qR56: 10K (1 -0 -3 -B)
qR57: 10K (1 -0 -3 -B)
qR58: 12K (1 -2 -3 -B)
qR59: 39K (3 -9 -3 -B)
qR60: 39K (3 -9 -3 -B)
qR61: 39K (3 -9 -3 -B)
qR62: 100K (1 -0 -4 -B)
qR63: 47K (4 -7 -3 -B)
qR64: 47K (4 -7 -3 -B)
qR65: 47 (4 -7 -0 -B)
qR66: 47 (4 -7 -0 -B)
qR67: 180 (1 -8 -1 -B)
qR68: 180 (1 -8 -1 -B)
qR69: 180 (1 -8 -1 -B)
qR70: 47 (4 -7 -0 -B)
qR71: 47 (4 -7 -0 -B)
qR72: 180 (1 -8 -1 -B)
8. LEDs (Check the polarity!)
LD...
COLOR = 2...5
CATHODE
qLD1: 5mm RED (2) BLINKING
qLD2: WILL BE MOUNTED
LATER, SEE SECTION 27
qLD3: 3mm YEL (4)
qLD4: 3mm YEL (4)
qLD5: 3mm YEL (4)
qLD6: 3mm YEL (4)
qLD7: 3mm GREEN (5)
qLD8: 3mm GREEN (5)
qLD9: 3mm RED (2)
qLD10: 3mm RED (2)
qLD11: 3mm RED (2)
qLD12: 3mm RED (2)
qLD13: 3mm RED (2) (next to R61)
9. IC SOCKETS
(Check the position of the notch!)
IC...
1
qIC1: 18P

__________________________________________________________________________________________________________________________________________________________
11
10. REED RELAYS
(Check the position of the notch!)
PIN 1
1
RY...
qRY1: VR05R121
11. DIP SWITCHES
1
SW...
Check that switch 1 corresponds to pin 1.
qSW2: DS-4P
12. RESISTOR TRIMMERS
Vertical type
RV...
qRV1: 100K
qRV2: 100K
qRV3: 100K
qRV4: 100K
Horizontal type
RV...
qRV5: 500K (470K)

_______________________________________________________________________________________________________________________________________________________
12
13. TRANSISTORS
T...
T...
T...
T...
qT1: BC516
qT2: BC547C
qT3: BC547C
qT4: BC547C
14. 5W RESISTORS
R...
2mm
REMARK: You will have one 15 Ohm 5W resis-
tors left over for later use.
qR73: 15
qR74: 15
qR75: 15
15. PCB BLADE TERMINALS
Mount them as straight AS possible against the
PCB. A good solder joint is very important !
SK...
qSK1: 4 Ohm
qSK2: GND
qSK3: 8 Ohm
qSK4: BLUE
qSK5: RED
qSK6: YELLOW
qSK7: GRAY
qSK8: GRAY
qSK9: GREEN
qSK10: GREEN
qSK21: EARTH
qSK22: EARTH
16. CINCH / RCA CONNECTOR
Mount it as straight and square as possible
against the PCB.
qSK11: CINFP/90

__________________________________________________________________________________________________________________________________________________________
13
17. PCB TERMINAL BLOCK
some blocks slide into each other !
Mount these terminals with the wire inputs fac-
ing the PCB edge:
qSK12: 2 POLE (large)
qSK13: 3 POLE
qSK14: 3 POLE
qSK15: 3 POLE
qSK16: 3 POLE
qSK17: 3 POLE
SK18 to SK20 are not mounted
18. VALVE SOCKET
59
8
7
4
3
2
V...
61
Mount them straight against the PCB
qV5: B9A
qV6: B9A
19. SWITCH
SW...
SIDE VIEW
IMPORTANT:
Don't leave a gap between
the SWITCH and the PCB!
Mount it as square as possible against the PCB,
Also solder the metal support.
qSW1: 3P ON-ON-ON
20. CAPACITORS
C...
Check the voltage rating!
qC1: 47nF (473, 0.047, 47000)
qC2: 100pF (101)
qC3: 330pF/400V (331)
qC4: 330pF/400V (331)
qC5: 68n/630V (683, 0.068)
qC6: 68n/630V (683, 0.068)
qC7: 68n/630V (683, 0.068)
qC8: 68n/630V (683, 0.068)
qC9: 68n/630V (683, 0.068)
qC10: 68n/630V (683, 0.068)
qC11: 680n/160V (684, 0.68)
qC12: 680n/160V (684, 0.68)
qC13: 680n/160V (684, 0.68)

_______________________________________________________________________________________________________________________________________________________
14
21. POWER RELAYS
The various relays have footprints that corre-
spond to the footprints on the PCB:
qRY2: VR10V121C
qRY3: VR10V121C
RY...
qRY4: VR5V122C
RY...
22. ELECTROLYTIC CAPACITOR
(Check the polarity!)
C...
qC14: 4µ7
qC15: 100µF
qC16: 470µF
qC17: 470µF
qC18: 470µF
qC19: 470µF
qC20: 47µF/100V
qC21: 100µF/100V
qC22: 1000µF
qC23: 4700µF
qC24: 47µF/350V
qC25: 47µF/350V
qC26: 100µF
qC27: 1µF

__________________________________________________________________________________________________________________________________________________________
15
23. TRANSFORMER
TRAFO...
qTRAFO1: 12VAC
24. ELECTROLYTIC CAPACITOR
(Check the polarity!)
Generally these capacitors are of the snap-in
type and cannot be mounted incorrectly.
C...
qC28: 100u/400V
qC29: 220u/450V
qC30: 220u/450V
qC31: 220u/450V
25. INSERT THE IC
(Check the position of the notch!)
IC...
PIN 1
1
qIC1: LM3914

_______________________________________________________________________________________________________________________________________________________
16
26. 6.3V VALVE WIRING
qWiring for the 4 valve sockets V1 to V4. Use the supplied brown wire. Twist them as shown in the
illustration. The polarity is not important. For safety, it is advisable to check with an ohmmeter
that the two 6.3V terminals are not shorted when the wiring is completed.
VIEWED FROM SOLDERSIDE
4
3
3
4
556
V4
1
8
21
78
f4
6.3VAC
f4 f3 f3
6.3VAC
f2 f2
8
8
1
6
75
4
1
V1
23
3
5
4
f1 f1
4
1
8
8
6
75
12
V2
3
3
5
4
4
3
3
4
556
V3
8
1
21
78
27. SPECIAL LED (Check the polarity!)
qLD2: 3mm bicolor:
Carefully check the mounting of this LED:
12
LD...
2
3
13
5mm
5mm
LD2 ONLY !
Check the complete assembly again for errors. Pay special attention to bad sol-
der joints, shorts and wrongly inserted or misplaced components !

__________________________________________________________________________________________________________________________________________________________
17
ASSEMBLY INTO THE CABINET:
•Mount the caged nuts into the square holes as shown in the illustration. These nuts are later used to
fasten the covers.
CLICK INTO HOLE
FIG 1
•Mount the chromed feet on the four cabinet corners, with an M4 bolt. To avoid scratches on other
equipment, you can stick a piece of felt on every foot (not supplied).
•Mount a shakeproof washer and a 15mm threaded spacer on the front and back studding as shown
in the illustration.
15mm M3 SPACER
M3 LOCK WASHER
M3 BOLT
FIG 2
•Position the PCB in the cabinet, and fasten at the bottom with the supplied black button head hexa-
gon socket screws (Use the supplied Allen key). At the component side of the PCB, two M3 bolts
fasten the PCB on the threaded spacers we mounted in the previous step.
•The mains inlet located at the back of the enclosure will be flush mounted as shown in the illustra-
tion. Use two black button head hexagon socket screws , together with a shakeproof washer and an
M3 nut.

_______________________________________________________________________________________________________________________________________________________
18
M3 LOCK WASHER
M3 NUT
M3 BOLT
MAINS INLET
FIG 3

__________________________________________________________________________________________________________________________________________________________
19
•Make the connections as shown. Use the supplied blue wire for the neutral (N) terminal, and brown
wire for the live (L) terminal.
FIG 4
The earth terminal is hooked up with green/yellow striped wire. The female push-on connector on the
green/yellow striped wire must be soldered for best results.
SOLDER
FIG 5
Connect the earth wire to SK21 on the PCB. Remove the fuse holder lid, and insert a miniature glass
fuse. For mains voltages of 100-125VAC, use the supplied 8A slow-blow fuse, while for 220-240VAC
operation the 4A slow-blow fuse needs to be fitted. The spare fuse can also be stored in the fuse
holder lid.
•Mounting of the speaker terminals: Mount them as shown in the diagram. Watch the position of the
plastic insulator rings : one is flat, while the other has an elevated ring on the inside. There is no
need to mount the solder lugs.
NUT
NUT
INSULATOR RING
SPEAKER TERMINAL
INSULATOR RING
FIG 6
HINT : For easy fastening of the speaker terminals, immobilise the terminal by inserting a screwdriver in
the wire hole, while fastening the nuts.
IMPORTANT: The speaker terminals must be electrically isolated from the metal enclosure. For safety,
check for infinite resistance between every terminal and the metal enclosure.

_______________________________________________________________________________________________________________________________________________________
20
•Use the supplied 1,5mm² wire to make the connections. For best results, solder the female push-on
connector (fig 5). Apply enough heat, in order to make a good solder joint.
FIG 7
•Mounting of the toroid transformers : The output transformer marked ZD043 must be fitted according
to the illustration, on the right hand side of the cabinet. Watch the location of the wires.
OUTPUT TRANSFORMER
RUBBER WASHER
RUBBER WASHER
M8 BOLT
STEEL DISHED WASHER FIG 8
!
IMPORTANT: Do not trim the wires of the transformers, leave them at their original length. If there
is more than one conductor in an insulating sleeve, you have to make sure they are soldered together
and make a good electrical connection before they are connected to the terminal block.