Velleman K4040 User manual

Total solder points: 700

Difficulty level:

beginner 1o2o3o4o5þadvanced

ILLUSTRATED PARTLIST H4040IP-ED1

K4040

STEREO VALVE POWER AMPLIFIER

⇒Pure valve sound with high quality EL34 valves

⇒High quality black and chrome housing

⇒Chrome 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

Specifications

•2 x 90Wrms in 4 or 8Ω

•Up to 2 x 15Wrms full class A

•Bandwidth: 8Hz to 80KHz (-3dB/1W)

•Harmonic distortion: 0.1% @ 1W/1KHz

•Signal to noise ratio: >105dB (A weighted)

•Input sensitivity: 1Vrms

•115VAC or 230VAC / 500VA max.

modifications reserved

stereopoweramplifier

4040

4K7= ( 4 - 7 - 2 - B )

4K7= ( 4 - 7 - 0 - 1 - 1 )

COLOR= 2… 5

IPESF SDK NDGB FNL

CODICE

COLORE

CODIGO

CORES

CODIGO

COLORES

VÄRI

KOODI FÄRG

SCHEMA

FARVE

KODE FARGE

KODE FARB

KODE COLOUR

CODE CODIFI-

CATION

DES

COU-

LEURS

KLEUR

KODE

Nero Preto Negro Musta Svart Sort Sort Schwarz Black Noir Zwart 0

Marrone Castanho Marrón Ruskea Brun Brun Brun Braun Brown Brun Bruin 1

Rosso Encarnado Rojo Punainen Röd Rød Rød Rot Red Rouge Rood 2

Aranciato

Laranja Naranjado

Oranssi Orange Orange Orange Orange Orange

Orange

Oranje

Giallo Amarelo Amarillo Keltainen Gul Gul Gul Gelb Yellow Jaune Geel 4

Verde Verde Verde Vihreä Grön Grøn Grønn Grün Green Vert Groen 5

Blu Azul Azul Sininen Blå Blå Blå Blau Blue Blue Blauw 6

Viola Violeta Morado Purppura Lila Violet Violet Violet Purple Violet Paars 7

Grigio Cinzento Gris Harmaa Grå Grå Grå Grau Grey Gris Grijs 8

Bianco Branco Blanco Valkoinen Vit Hvid Hvidt Weiss White Blanc Wit 9

Argento Prateado Plata Hopea Silver Sølv Sølv Silber Silver Argent Zilver A

Oro Dourado Oro Kulta Guld Guld Guldl Gold Gold Or Goud B

__________________________________________________________________________________________________________________________________________________________

VELLEMAN KIT NV

Legen Heirweg 33

9890 Gavere

Belgium

http://www.velleman.be

_______________________________________________________________________________________________________________________________________________________

STEREO VALVE AMPLIFIER

TECHNICAL DATA*

•Output power:

2 X 0 to 15 Wrms class A

2 x 15 to 90 Wrms class AB

•Output impedance 4 or 8 Ohms

•Ultra linear output transformers

•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: 15 -40kHz (-3dB, ref 50W)

•Frequency range: 8 Hz -80kHz (-3dB, ref 1W)

•Harmonic distortion:

0.1% (1 kHz/1W)

0.7% (1 kHz/90W)

•Signal/noise ratio: > 105dB (A weighted wrt 90W)

•Channel isolation (75dB wrt 90W)

•Input impedance: 34Kohm

•Input sensitivity (1Vrms) for 90W

•Damping factor (100Hz): > 10

*We reserve the right to make changes.

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.

Mount the components

against the PCB surface

and carefully solder the

leads in place.

Obtain cone-shaped, shiny

soldered joints by heating

the component leads suffi-

ciently.

This solder joint re-

sults in a bad con-

nection.

Trim the excess

wires up to the level

of the solder

•Careless assembly will certainly lead to problems.

•Insert the part, oriented correctly, into its correct holes on the PCB.

•Mount the components in the correct order as stated in this manual.

•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

__________________________________________________________________________________________________________________________________________________________

Assembly of the small input PCB P4040i:

This PCB is used to connect the input signal (via two RCA sockets) via two holes at the rear of the cabi-

net.

1. CAPACITORS

C...

qC1: 47nF (473, 0.047)

2. CINCH / RCA CONNECTOR

Mount them as straight and square as possible

against the PCB

qSK1: CINCH

qSK2: CINCH

3. SHIELDED WIRE CONNECTION

Carefully strip the screened cable supplied and

make the connection as shown in the figure

15cm

LEFT

RIGHT

GND

P4040i

qGND

_______________________________________________________________________________________________________________________________________________________

15mm M3 SPACER

8mm SPACER

PCB

VALVE SOCKET

15mm M3 BOLT

Assembly of the main PCB P4040B:

Foreword:

Because of the PCB dimensions, first mount the 8 large tube sockets so that the PCB can rest on a ta-

ble, without the component leads being touched.

When mounting the components, it is best to fold back the component leads a little before turning the

PCB over to solder them.

1. VALVE SOCKET MOUNTING

Check the position of the notch in the centre of the tube socket, it must correspond to the notch in the

circle printed on the PCB. Connect the leads to the corresponding isle on the PCB using a small piece of

jumper wire.

IMPORTANT:

Make the connection exactly as shown in the figure, otherwise the small piece of wire could touch the

bottom of the cabinet.

qV1: I.O.

qV2: I.O.

qV3: I.O.

qV4: I.O.

qV5: I.O.

qV6: I.O.

qV7: I.O.

qV8: I.O.

Also mount a 15 mm spacer on the remaining holes in

the PCB (at the solder side), use a 6 mm M3 bolt:

•Two spacers round tube sockets V9 and V10

•A spacer next to RY3

•A spacer next to T2

•A spacer next to R1

•A spacer next to SW1, together with a lock

washer at the solder side:

6mm M3 BOLT

M3 LOCK WASHER

15mm M3 SPACER

2 7

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 jumpwire but take care that the connec-

tion does not come above the spacer, otherwise, the wire

could touch the housing later (see drawing above).

__________________________________________________________________________________________________________________________________________________________

2. JUMPERS

qJ1 (mount 2 wires)

qJ2 (mount 2 wires)

qJ3 (mount 2 wires)

qJ4 (mount 2 wires)

qJ5 (mount 2 wires)

qJ6 (mount 2 wires)

qJ7

qJ8

qJ9

qJ10

qJ11

qJ12

qJ13

qJ14

qJ15

qJ16

qJ17

qJ18

qJ19

qJ20

qJ21

qJ22

qJ23

qJ24

qJ25

qJ26

3. JUMPERS FOR VOLTAGE

SELECTION

MAINS VOLTAGE SELECTION:

For 100V mains input, mount:

For 120V mains input, mount:

For 230V mains input, mount:

For 240V mains input, mount:

D D

REMARK:

Strike out the NOT used mains voltage indica-

tion at the back of the housing !! e.g. cross out

with a permanent black marker

4. DIODES (Check the polarity!)

Note that from J1 to J6, two jumper leads have

to be mounted in the same hole.

TIP

In order to get nice straight wiring, without too

much folding and measuring, follow these

hints:

•Mount the lead on the PCB as it is.

•Solder 1 end of the lead.

•Then carefully pull on the free end of the

lead until it is straight.

•Now solder the other end.

_______________________________________________________________________________________________________________________________________________________

D...

CATHODE

qD1: 1N4148

qD2 :1N4148

qD3: 1N4007

qD4: 1N4007

qD5: 1N4007

qD6: 1N4007

qD7: 1N4007

qD8: 1N4007

qD9: 1N4007

qD10: 1N4007

qD11: 1N5408 not on tape !

qD12: 1N5408 not on tape !

qD13: 1N5408 not on tape !

qD14: 1N5408 not on tape !

qD15: 1N4148

qD16: 1N4148

qD17: 1N4007

qD18: 1N4148

qD19: 1N4007

qD20: 1N4007

qD21: 1N4007

qD22: 1N4148

qD23: 1N4148

qD24: 1N4148

qD25: 1N4148

qD26: 1N4007

5. ZENER DIODES

(Check the polarity!)

ZD...

CATHODE

qZD1: 3V9

qZD2: 3V9

6. ¼W RESISTORS

R...

qR1: 1K (1 -0 -2 -B)

qR2: 1K (1 -0 -2 -B)

qR3: 470 (4 -7 -1 -B)

qR4: 1K (1 -0 -2 -B)

qR5: 22K (2 -2 -3 -B)

qR6: 220K (2 -2 -4 -B)

qR7: 2K2 (2 -2 -2 -B)

qR8: 2K2 (2 -2 -2 -B)

qR9: 220K (2 -2 -4 -B)

qR10: 22K (2 -2 -3 -B)

qR11: 12K (1 -2 -3 -B)

qR12: 33K (3 -3 -3 -B)

qR13: 33K (3 -3 -3 -B)

qR16: 12K (1 -2 -3 -B)

qR17: 820K (8 -2 -4 -B)

qR18: 820 (8 -2 -1 -B)

qR19: 180 (1 -8 -1 -B)

qR20: 1M (1 -0 -5 -B)

qR21: 22K (2 -2 -3 -B)

qR22: 3K9 (3 -9 -2 -B)

__________________________________________________________________________________________________________________________________________________________

qR23: 820K (8 -2 -4 -B)

qR24: 820 (8 -2 -1 -B)

qR25: 180 (1 -8 -1 -B)

qR26: 1M (1 -0 -5 -B)

qR27: 22K (2 -2 -3 -B)

qR28: 3K9 (3 -9 -2 -B)

qR29: 10K (1 -0 -3 -B)

qR30: 10K (1 -0 -3 -B)

qR31: 10K (1 -0 -3 -B)

qR32: 10K (1 -0 -3 -B)

qR33: 10K (1 -0 -3 -B)

qR34: 10K (1 -0 -3 -B)

qR35: 1K5 (1 -5 -2 -B)

qR36: 1K5 (1 -5 -2 -B)

qR37: 560 (5 -6 -1 -B)

qR38: 10K (1 -0 -3 -B)

qR39: 220K (2 -2 -4 -B)

qR40: 100K (1 -0 -4 -B)

qR41: 220K (2 -2 -4 -B)

qR42: 100K (1 -0 -4 -B)

qR43: 220K (2 -2 -4 -B)

qR44: 100K (1 -0 -4 -B)

qR45: 220K (2 -2 -4 -B)

qR46: 100K (1 -0 -4 -B)

qR47: 1K5 (1 -5 -2 -B)

qR48: 33K (3 -3 -3 -B)

qR49: 12K (1 -2 -3 -B)

qR50: 220K (2 -2 -4 -B)

qR51: 10K (1 -0 -3 -B)

qR52: 100K (1 -0 -4 -B)

qR53: 220K (2 -2 -4 -B)

qR54: 100K (1 -0 -4 -B)

qR55: 220K (2 -2 -4 -B)

qR56: 100K (1 -0 -4 -B)

qR57: 220K (2 -2 -4 -B)

qR58: 100K (1 -0 -4 -B)

7. 1/2W RESISTORS

R...

qR59: 100K (1 -0 -4 -B -9)

qR60: 100K (1 -0 -4 -B -9)

qR61: 47K (4 -7 -3 -B -9)

qR62: 47K (4 -7 -3 -B -9)

qR63: 220 (2 -2 -1 -B -9)

qR64: 220 (2 -2 -1 -B -9)

qR65: 820 (8 -2 -1 -B -9)

qR66: 220 (2 -2 -1 -B -9)

qR67: 220 (2 -2 -1 -B -9)

qR68: 820 (8 -2 -1 -B -9)

qR69: 330K (3 -3 -4 -B -9)

qR70: 330K (3 -3 -4 -B -9)

qR71: 330K (3 -3 -4 -B -9)

qR72: 330K (3 -3 -4 -B -9)

qR73: 330K (3 -3 -4 -B -9)

qR74: 330K (3 -3 -4 -B -9)

qR75: 330K (3 -3 -4 -B -9)

qR76: 330K (3 -3 -4 -B -9)

_______________________________________________________________________________________________________________________________________________________

8. 1W RESISTORS

R...

2mm

qR77: 270 (2 -7 -1 -B)

qR78: 10K (1 -0 -3 -B)

qR79: 10K (1 -0 -3 -B)

qR80: 15K (1 -5 -3 -B)

qR81: 680K (6 -8 -4 -B)

qR82: 15K (1 -5 -3 -B)

qR83: 47K (4 -7 -3 -B)

qR84: 47K (4 -7 -3 -B)

qR85: 390K (3 -9 -4 -B)

qR86: 47K (4 -7 -3 -B)

qR87: 47K (4 -7 -3 -B)

qR88: 390K (3 -9 -4 -B)

qR89: 180 (1 -8 -1 -B)

qR90: 180 (1 -8 -1 -B)

qR91: 180 (1 -8 -1 -B)

qR92: 180 (1 -8 -1 -B)

qR93: 180 (1 -8 -1 -B)

qR94: 180 (1 -8 -1 -B)

qR95: 180 (1 -8 -1 -B)

qR96: 180 (1 -8 -1 -B)

qR97: 10 (1 -0 -0 -B)

qR98: 10 (1 -0 -0 -B)

qR99: 10 (1 -0 -0 -B)

qR100: 10 (1 -0 -0 -B)

qR101: 10 (1 -0 -0 -B)

qR102: 10 (1 -0 -0 -B)

qR103: 10 (1 -0 -0 -B)

qR104: 10 (1 -0 -0 -B)

9. LEDs (Check the polarity!)

LD...

COLOR = 2...5

CATHODE

qLD1: 5mm red blinking

qLD2: 3mm bicolor:

Carefully check the assembly of this LED:

LD...

5mm

LD2 ONLY !

qLD3: 3mm RED

qLD4: 3mm RED

qLD5: 3mm RED

qLD6: 3mm RED

qLD7: 3mm GREEN

qLD8: 3mm GREEN

qLD9: 3mm RED

qLD10: 3mm RED

qLD11: 3mm RED

qLD12: 3mm RED

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