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  4. K4040
  5. Illustrated Assembly Manual

Velleman K4040 Illustrated Assembly Manual

Other manuals for K4040: Manual

Summary of K4040

  • Page 1

    Total solder points: 700 difficulty level: beginner 1 2 3 4 5 ⌧ advanced stereo valve power amplifier illustrated assembly manual h4040ip-1 k4040 k4040 for most o f us a high power valv e amplifier is unaffordab le. This kit changes th at, so that now everybody can enjoy that sublim e "valve so und"...

  • Page 2

    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/1khz. • signal to noise ratio: >105db (a weighted). • input sensitivity: 1vrms. • 115vac or 230vac / 500va max. Modifications reserved features: pure valve ...

  • Page 3

    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 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 ...

  • Page 4

    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-shaped and shiny 3- trim excess leads as close as possible to the solder joint remove them from the tape one at a time ! Assembly hints axial components are t...

  • Page 5

    5 construction c1 : 47nf (473) 1. Ceramic capacitor c ... 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 cabinet. Sk1 : cinch sk2 : cinch 2. Cinch / rca connector l gnd r gnd 3. Shielded wire connector left ...

  • Page 6

    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 table, without the component leads being touched. When mounting the components, it is best to fold back the component leads a little before turning the pc...

  • Page 7

    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 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 t...

  • Page 8

    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 (2 - 2 - 3 - b) r6 : 220k (2 - 2 - 4 - b) r7 : 2k2 (2 - 2 - 2 - b) r8 : 2k2 (2 - 2 - 2 - b) r9 : 220k (2 - 2 - 4 - b) r10 : 22k (2 - 2 - 3 - b) 6. 1/4w resistors r... D7 : 1n4007 d8 : 1n4007 d...

  • Page 9

    9 ld1 : 5mm red blinking ld2 : 3mm bicolour carefully check the assembly of this led : ld3 : 3mm red ld4 : 3mm red ld5 : 3mm red ld6 : 3mm red ld7 : 3mm green ld8 : 3mm green ld9 : 3mm red ld10 : 3mm red ld11 : 3mm red ld12 : 3mm red ic1 : 18p 10. Ic socket. Watch the position of the notch! 9. Leds....

  • Page 10

    10 construction ry1 : vr05r121 ry2 : vr05r121 11. Reed relays. Check the position of the notch! Pin 1 1 ry... Rv1 : 100k rv2 : 100k rv3 : 100k rv4 : 100k rv5 : 100k rv6 : 100k rv7 : 100k rv8 : 100k 12. Resistors trimmers (vertical type) rv... T1 : bc547c t2 : bc547c t3 : bc547c t4 : bc516 13. Transi...

  • Page 11

    11 mount them square against the pcb! V9 : b9a v10 : b9a v11 : b9a with the holes facing the pcb edge ! Sk3 : 2p sk4 : 2p sk9 : 2p sk10 : 2p sk11 : 2p sk12 : 2p sk13 : 2p sk14 : 2p sk15 : 2p sk16 : 2p sk5 : 3p sk6 : 3p sk7 : 3p sk8 : 3p 18. Pcb connectors 19. Valve sockets 5 9 8 7 4 3 2 v... 6 1 the...

  • Page 12

    12 construction generally these capacitors are from the snap-in type and cannot be mounted incorrectly. C35 : 22µf/350v c36 : 22µf/350v c37 : 100µf/400v c38 : 100µf/400v c39 : 220µf/450v c40 : 220µf/450v c41 : 220µf/450v c42 : 220µf/450v 23. Electrolytic capacitors (check the polarity) c... Mount hi...

  • Page 13

    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 6.3v terminals are not short circuited. 26. 6,3v valve wiring viewed from solderside 3 4 5 4 3 5 6 v8 8 1 2 7 1 8 8 1 v5 8 1 7 2 6 5 4 5 3 3 4 4 3 3 4 ...

  • Page 14

    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 nuts are used to fasten the covers down, and there are 7 of them in the cabinet base. Mount the input pcb on the right-hand side of the housing as sho...

  • Page 15

    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). Solder a 35 cm length of red wire to the 0 connection (red). Fit the unit onto the housing with three black allen bolts, fix with a shakeproof washer and nut. ...

  • Page 16

    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 an output transformer on the left-hand side of the housing, see figure 6.0. Check the position of the leads. Turn over the housing and solder the trans- fo...

  • Page 17

    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. Mount the supply transformer in the middle of the cabinet. Ensure that the leads are positioned as shown in the figure 6. The thick grey and green wires must ...

  • Page 18

    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, mains, with the blue wire to the n terminal and the brown wire to the l terminal. The short earth wire is connected to the earth connector. Connection...

  • Page 19

    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 changed for your country. In that case, cut off the plug from the lead, and connect an appropriate plug for your country. Connect the blue wire to the n connec...

  • Page 20

    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 c6a7, cv1741) into their sockets (check the position of the notch). Standby current adjustment no measuring equipment is needed for the following adjustment, ...

  • Page 21

    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. Now a preamplifier can be connected and the unit can be tested with music. 31. Test important if 8 ohm loudspeakers have been connected, then first check...

  • Page 22

    22 6mm m3 button head bolt lock washer 6mm m4 button head bolt front panel support bracket housing the cabinet can now be completed by first fitting the covers for the supply transformers. Mount the front panel to the cabinet, use the support brackets supplied, together with m3 and m4 allen bolts. C...

  • Page 23

    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 rack. We advise to check the standby current adjustment once a year, certainly if the end tubes are new. This can easily be done by removing the front pan...

  • Page 24

    24 35. Diagram power supply diagram r 1 0 6 1 5 /5 w b c 5 4 7 c t 1 l d 2 l -9 3 w e g w d 1 1 n 4 1 4 8 r y 3 v r 5 v 1 2 2 c r 4 1 k 7 v 5 z d 1 c 2 7 4 7 0 u 5 a s l o w @ 1 0 0 -1 2 0 v a c f 1 m a in s n l c 2 8 4 7 0 u 7 r 3 6 1 k 5 r e d 9 s w 1 4 1 8 l d 4 r e d r 7 6 3 3 0 k /0 .5 w 4 b ia...

  • Page 25

    25 36. Diagram (right channel) diagram r 3 2 1 0 k r 3 4 1 0 k r 5 7 2 2 0 k r 5 3 2 2 0 k r 3 3 1 0 k r 5 1 1 0 k r 5 0 2 2 0 k r 2 6 1 m r 2 3 8 2 0 k c 2 1 2 2 n /6 3 0 v c 4 1 0 0 p r 1 3 3 3 k r 6 7 2 2 0 /. 5 w r 6 6 2 2 0 /. 5 w f2 f1 r 1 6 1 2 k g r e e n 6 .3 v a c g n d g r e e n 1 3 r y 2...

  • Page 26

    26 37. Diagram (left channel) diagram r 2 9 1 0 k r 3 1 1 0 k r 4 5 2 2 0 k r 4 1 2 2 0 k r 3 0 1 0 k r 3 8 1 0 k r 3 9 2 2 0 k r 2 0 1 m r 1 7 8 2 0 k c 1 4 2 2 n /6 3 0 v c 3 1 0 0 p r 1 2 3 3 k r 6 4 2 2 0 /. 5 w r 6 3 2 2 0 /. 5 w f2 f1 r 1 1 1 2 k g r a y 6 .3 v a c g n d g r a y 1 3 r y 1 v r ...

  • Page 27

    27 38. Pcb pcb 3 6 5 v d c 1 1 0 v d c 6 .3 v a c c 3 1 c 3 8 s k 4 1 s w 3 r 1 0 2 c2 1 v 1 0 r 1 0 4 j 4 f1 f1 f2 s k 3 r8 7 r8 6 r2 0 r6 5 r1 9 r8 3 r8 4 rv 1 d 1 9 d 2 6 d2 0 r 3 5 sw 1 d2 1 r3 7 l d 1 r3 6 l d 2 1 3 1 d2 5 2 j 2 6 3 r3 9 r4 0 r 3 8 5 d 2 4 j 2 4 j 2 5 4 3 r8 9 r9 0 5 4 3 v io l...

  • Page 28

    Velleman kit nv legen heirweg 33 9890 gavere belgium europe info ?: http://www.Velleman.Be modifications and typographical errors reserved © velleman kit nv h4040ip - 2004 - ed1 (rev. 1.0) 5 4 1 0 3 2 9 3 1 9 1 8 2.