Velleman-projects K4040 Assembly instructions Manuel d'utilisateur

Total solder points: 700 Difficulty level: beginner 1  2  3  4  5 ⌧ advanced Stereo valve power amplifier ILLUSTRATED ASSEMBLY MANUAL

10 Construction  RY1 : VR05R121  RY2 : VR05R121 11. REED relays. Check the position of the notch! PIN 11RY...  RV1 : 100K  RV2

11  Mount them square against the PCB!  V9 : B9A  V10 : B9A  V11 : B9A  With the holes facing th

12 Construction  Generally these capacitors are from the snap-in type and cannot be mounted incorrectly.  C35 : 22µF/350V  C36 : 22µF/350V

13 Wiring for the 8 tube sockets V1 to V8. Use twisted brown wire for each one. For safety, it is advis-able to check with an ohmmeter that the two 6

14 Assembly into the unit Mount the cage nuts into the square holes concerned, from the inside to the outside, (with the nut along the inside). These

15  Check that the solder side of the PCB, is along the side of the nuts.  Solder a 35 cm length of yellow wire to the 4 Ohm connection (YEL).  S

16 Mount the ring core transformers:  Stick a adhesive foot to the base of the cabinet, in the middle where each transformer has to be put.  Mount

17  Twist the previously soldered red and yellow wires together and fit them as shown in the figure, the cable ties supplied can also be used.  Mo

18 Fit the main PCB into the housing and screw it down with the black Allen bolts along the underside. Connect the mains lead to the screw connector,

19  Switch the mains voltage switch to OFF, ie. fully down.  Connect the mains connector via a lead to a mains outlet. The plug may have to be chan

Specifications: • 2 x 90Wrms in 4 or 8W. • Up to 2 x 15Wrms full class A. • Bandwidth: 8Hz to 80KHz (-3dB/1W). • Harmonic distortion: 0.1% @ 1W/1

20  Switch off the mains voltage.  Turn all trimmer potentiometers, RV1 to RV8, fully anticlockwise.  Mount the 8 tubes, V1 to V8, type EL34 (or C

21 Test & final assembly of the cabinet The amplifier can now be connected to loudspeakers of 8 or 4 Ohms, the common connection is in the middle.

22 6mm M3 BUTTON HEAD BOLTLOCK WASHER6mm M4 BUTTON HEAD BOLTFRONT PANELSUPPORT BRACKETHOUSING The cabinet can now be completed by first fitting the c

23 It is normal for the tubes and cabinet to get very hot, so place the amplifier in a well ventilated area, certainly not in a closed cabinet or rac

24 35. Diagram power supply Diagram R10615/5WBC547CT1LD2L-93WEGWD11N4148RY3VR5V122CR41K7V5ZD1C27470u5A SLOW @ 100-120VACF1MAINSNLC28470u7R361K5RED9SW

25 36. Diagram (right channel) Diagram R3210KR3410KR57220KR53220KR3310KR5110KR50220KR261MR23820KC2122n/630VC4100pR1333KR67220/.5WR66220/.5Wf2f1R1612

26 37. Diagram (left channel) Diagram R2910KR3110KR45220KR41220KR3010KR3810KR39220KR201MR17820KC1422n/630VC3100pR1233KR64220/.5WR63220/.5Wf2f1R1112K

27 38. PCB PCB 365VDC110VDC6.3VACC31C38SK41SW3R102C21V10R104J4f1f1f2SK3R87R86R20R65R19R83R84RV1D19D26D20R35SW1D21R37LD1R36LD2131D252J263R39R40R385D24

VELLEMAN KIT NV Legen Heirweg 33 9890 Gavere Belgium Europe Info ?: http://www.velleman.be Modifications and typographical errors reserved © Vellema

3 Assembly hints 1. Assembly (Skipping this can lead to troubles ! ) Ok, so we have your attention. These hints will help you to make this project s

4 1.3 Soldering Hints : 1- Mount the component against the PCB surface and carefully solder the leads 2- Make sure the solder joints are cone-s

5 Construction  C1 : 47nF (473) 1. Ceramic Capacitor C...Assembly of the small input PCB P4040i: This PCB is used to connect the input

6 Construction Assembly of the main PCB P4040B: Because of the PCB dimensions, first mount the 8 large tube sockets so that the PCB can rest on a tab

7 Construction  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

8  R1 : 1K (1 - 0 - 2 - B)  R2 : 1K (1 - 0 - 2 - B)  R3 : 470 (4 - 7 - 1 - B)  R4 : 1K (1 - 0 - 2 - B)  R5 : 22K (

9  LD1 : 5mm Red blinking  LD2 : 3mm Bicolour  Carefully check the assembly of this LED :  LD3 : 3mm RED  LD4 :