QRPKits Weber Dual Band, Assembly Instructions Manual

Page 1: ...for rock steady stability with 50 Hz and 200 Hz tuning rates Easy to read four digit LED display with leading zero suppression Rotary knob tuning RIT receive incremental tuning Four IF crystals for ex...

Page 2: ...to pay attention to Parts check list QTY VALUE QTY VALUE QTY VALUE 1 10 BRN BLK BLK GLD 2 2 2 pfd 2 2 NPO disk 1 FQPF7P06 PMOSFET TO 220 1 51 GRN BRN BLK GLD 3 22 pfd 22 NPO disk 3 BS170 NMOSFET TO 92...

Page 3: ...3 Silk screen of Q10 missing from board Parts placement guide color...

Page 4: ...4 Parts placement diagram inkjet friendly Parts with no value indicated have band specific values Q10 silk screen missing from board...

Page 5: ...Assembled board mounted in case 5 Speaker mounting...

Page 6: ...N BLK BLK GLD Molded inductors There are four 4 molded inductors RFC to install These look like resistors but are a little shorter and fatter Like resistors the value is also color coded on the body o...

Page 7: ...be installed last location value type location value type C1 BAND SPEC SEE BAND TABLE C23 0 1 ufd 104 MONO YELLOW C2 0 1 ufd 104 MONO YELLOW C24 100 pfd 101 NPO DISK OR MONO YELLOW C3 0 1 ufd 104 MONO...

Page 8: ...ds Space the package about 1 8 above the board no not push real close to the board Also be sure to orientate the flat side of the package with the flat side of the part outline Install Q2 Q3 Q4 BS170...

Page 9: ...or L8 24 turns 30 wire T37 2 Red L10 or L8 18 turns 28 wire T37 2 Red L9 or L7 29 turns 30 wire T37 2 Red L9 or L7 20 turns 28 wire T37 2 Red L2 or L1 18 uHy BRN GRY BLK GLD L2 or L1 8 2 uHy GRY RED G...

Page 10: ...to front of cabinet before soldering pins Install V1 volume control Solder mounting tabs to board Clip tab along bottom edge of board flush to board Install ENC1 the tuning encoder Solder mounting tab...

Page 11: ...ower to the main board The LED display should come on and show 8 8 8 8 for a few seconds then 80 then 560 0 At this point tuning the encoder should make the digits on the display change 16 Remove powe...

Page 12: ...arts to fall off on either side of the pass band You will likely see a peak in the signal on each side of the pass band just before it starts to quickly roll off You will want to set the LO frequency...

Page 13: ...and the big rig Transmit a signal with the dual band rig and tune it in with the big rig Transmit a signal with the big rig and fine tune the BFO trimmer so the signal peaks For best results adjust t...

Page 14: ...re on the 5 volt supply feeding most of the IC s If the display comes on the microprocessor is working and if you get side tone when you use the paddle or hear hiss when the volume control is turned a...

Page 15: ...ry The last used frequency for each band is restored when switching between bands However these frequencies are not stored in nonvolatile memory so the default start up frequency is loaded on power up...

Page 16: ...to indicate the message was stored and the frequency display will be restored Sending a message Click the KEYER switch then within one 1 second tap the DOT or Dash paddle to send either message 1 or 2...

Page 17: ...nd the final dot will automatically added B mode is only useful for aiding in the sending of a couple of letters and can be more trouble than its worth as your timing has to be very good AGC action Th...

Page 18: ...18 Receiver circuits schematic...

Page 19: ...19 MPU Transmitter Front panel schematic...

Page 20: ...filter reduces the amplitude of the uP generated square wave signal and improves its sound Injecting the side tone signal into the audio amplifier in this way allows for volume control independent si...

Page 21: ...voltage ramp Q1 connected back to the uP is used to turn Q10 on and off for keying Microprocessor control An Atmel MEGA48 processor is used to control the rig This processor provides all the logic fu...