Hello,
I have found an old K7202 power supply kit for sale, but it’s advertised as being incomplete as it is missing the documentation and some of the parts. Does anyone have the parts list for the main PCB of this kit?
Thanks in advance.
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Thank you for the answer. This will help me get the existing parts on the PCB, but I also need the values for these parts: RV2, R8, RV3, R27, RV1, R18, R26, R13 and R6 since they seem to be missing from the kit.
BILL OF MATERIAL K7202 : 0…30V/0…5A POWER SUPPLY
RESISTORS CAPACITORS
R1 6K8 C1 150p
R2 8K2 C2 33n
R3…R8 4K7 C3 68n
R9…R12 220E0 C4 100n
R13,R14 2K2 C5 1µ
R15,R16 2K7 C6,C7 10µ
R17…R18 820E0 C8,C9 100µ
R19…R22 22K0 C10 470µ
R23,R24 1K2 C11 4µ7
R25 100K0
R26 15K0
R27 100E0
R28,R29 1K0
R30 220K0
R31 18E0
R32 270K0
R33 12K0
R34 27K0
R35 39E0
R36 180E0 —> VR10V12 (MILLION SPOT)
R37,R39 10cm RESISTOR WIRE (1 Ohm/m)
R41…R43 0E22
RV1 100R
RV2 47k
RV3 4k
RV4 10k
RV5 1k
DIODES TRANSITORS
D1…D3 1N4007 T1 BC557B
ZD1 10V0 T2 BC547B
ZD2 18V0 T3 BD646
LD1 LSH3201 T4…T6 TIP3055
B1 100V151
CHOKES IC’S
L1 4700H0 IC1 UA741M
IC2,IC3 UA723D
DIVERS
SW1 R1823A
F1 FU4 (4A SLOW)
TRANSFO1 30015 (2X15V/300VA)
RY1 VR10V12 (MILLION SPOT)
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Thank you very much for the help!
We had to search in our archives but we found it =D
I really wanted this kit since it’s very well built and, even if it uses older technology inside, the specs are great (e.g. just 0.5 mV of ripple) and it’s cheap to maintain in case something breaks, not to mention the parts can be found with ease. This is a prime example of good engineering in my opinion.
I think that Velleman could still sell a power supply like K7200 or K7202, but with a more modern front panel meter, based on a microcontroller (like an AVR) + an LCD screen since it would eliminate the need for a second transformer and it would be less costly than 7107. To make things easy, it could be offered without a case.
Thanks again and keep up the good work!