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Small Wonder Labs

         PSK-30 Transceiver Kit                     03/09/10                         

2000 

 

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Summary of Contents for PSK-30

Page 1: ...e This version of the printed circuit board features all through hole capacitors and only one SMT part U8 Please refer to the enclosed sketch for placement of 01 disk capacitors and IC sockets for U3...

Page 2: ...art They re at 800 842 3131 FIRST THINGS FIRST Stuff worth knowing COLOR CODES Resistor color codes are given in the parts list Radio Shack s Color Code Guide 271 1210 or the ARRL Handbook will help I...

Page 3: ...to the probe and the board trace simultaneously until the tool pushes through Lacking either of these tools a round wooden toothpick works well also WINDING TOROIDS Count as you go Draw each turn snu...

Page 4: ...ilure Extra information on components There s often extraneous information marked on components Examining a sample IC I find MC1458P1 KKJK 8949 You care only about the 1458 or other markings I ve spec...

Page 5: ...pkg 1 Q3 2N3906 PNP transistor plastic pkg 2 Q4 Q12 2N7000 MOSFET transistor plastic pkg 4 Q5 Q8 2N4401 NPN transistor plastic pkg 1 Q9 MPSH10 NPN transistor plastic pkg 1 Q10 2N5109 NPN transistor m...

Page 6: ...ated components The output of this preamp is slug tuned via inductor L3 Diode ring Mixer U1 is fed with a 6 1 Mhz Local Oscillator LO signal and converts the incoming 10 1 Mhz received signal to the 4...

Page 7: ...be plainly audible through the receiver This situation would lead to soundcard feedback distortion on receive without the presence of this muting function Q6 is an emitter follower which provide a 51...

Page 8: ...10 C118 R51 Q10 C38 R52 R53 R54 56 D11 C119 Q11 T2 D12 C121 C120 D10 C39 C40 C41 C42 C43 L11 L12 L13 R57 D13 D14 C122 TP2 J5 Vr Vr Vr Vr Vr V Vr Vsw Vsw Vsw J6 01 ANT 2 2K 220 uF 1 1 1 5 3 pl 1 51 10...

Page 9: ...10K 22K 01 22K 10K C110 J4 C 4 7K R32 Q3 C124 2N3906 01 4 7K V U4 B J1 AF Out C16 01 C18 Vr D15 C19 1 C106 D5 D6 C20 3 3 3 2 1 R21 1M V R22 R23 33K 10K C13 330 T1 R24 2 2K C109 01 2 8 1 5 3 7 MC1350...

Page 10: ...R35 10K 470 2 2K R40 TEST C25 Y7 R41 R42 51 3 0K 15 C26 C27 15 15 C28 15 15 C29 Y8 Y9 Y10 C109 Y1 Y2 Y3 Y4 R12 C104 C9 C10 C11 C12 15 15 4 7K C13 C108 R18 330 01 10K 01 C115 U7 01 15 47 C7 C8 R11 R10...

Page 11: ...points from the top side of the board Orientation of color bands on resistors and other nonpolar devices is not critical Installing IC sockets The notch or dot at one end should be oriented as shown...

Page 12: ...rt Observe the polarity marking on the device the dark bar down one side of the part denotes the negative lead Note that the longer of the two capacitor leads is Install diodes D16 and D17 1N4148s bel...

Page 13: ...and C16 01 uF disk caps 103 Install diodes D5 and D6 1N4148 Observe the installation polarity as shown on the silkscreen Install electrolytic cap C20 3 3 uF Observe the installation polarity as shown...

Page 14: ...red org Install R60 1K brown blk red Install monolithic caps C45 C47 180 pF Note these components are somewhat fragile To spread the lead spacing to match the 0 2 5mm spacing on the pads grasp the ca...

Page 15: ...on cautions Install C7 47 pF ceramic disk cap Install C8 through C12 15 pF ceramic disk caps Install four of the 4 00 MHz crystals at Y1 Y4 Install R10 150 brown green brown Install R9 and R11 680 blu...

Page 16: ...RF choke brown grey gold Install C1 33 pF disk cap Install transistor Q1 J309 J310 from antistatic bag Match the orientation of the flat side of the component to that of the silkscreen Install Mixer U...

Page 17: ...ot populate these locations Install Q4 2N7000 from antistatic bag Match the orientation of the flat side of the component to that of the silkscreen This part is static sensitive Install Q5 and Q6 2N44...

Page 18: ...flat side of the component to that of the silkscreen C25 Y7 R42 3 0K 15 C26 C27 15 15 C28 15 15 C29 Y8 Y9 Y10 C115 U7 C114 D9 Q9 C30 1K R43 R44 R45 220 22K C116 R46 100 Ref only C31 SA 612 Tin each of...

Page 19: ...component Note its placement carefully with respect to nearby silkscreened component outlines before installing and soldering Install R51 and R52 10 brown blk black Install C118 and C119 1 uF monolith...

Page 20: ...5cm length of telephone cable Select any 2 of the 4 wires and pass both through the hole in the toroid Wrap this wire pair snugly around the toroid for one complete turn It should look like this Proce...

Page 21: ...lace with a nylon nut Make sure that the heat sink is aligned parallel with the board before tightening the nut Tighten cautiously the nylon nut threads will strip at the torque typically used for ste...

Page 22: ...ry enclosures offered by a number of companies There s no minimum order and they can be reached at 800 524 6464 for a catalog Ten Tec also offers a complete line of enclosures and they support small o...

Page 23: ...or SPKR OUT to the PSK 30 s J3 connector with a 3 5mm 1 8 3 conductor cable Connect your computer speaker cable to the PSK 30 s J2 connector J2 and J3 are in parallel and permit use of the soundcard f...

Page 24: ...checked the PSK 30 responds to either one Connect the multimeter return lead to board ground to TP1 in the lower right corner of the board Using the plastic tuning tool adjust inductor L8 for a maximu...

Page 25: ...gnal on the computer s panoramic display Repeat this probing moving back upstream toward the receiver input through the signal path If there s a stage where the chain is broken and there s no longer a...

Page 26: ...attern and there s no information being sent If the signal is badly smeared by propagation conditions the phase information may be lost PSK31 is susceptible to polar auroral flutter DigiPan has an adj...

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