QRPKits Hendricks PFR-3B, Manual

Page 1: ...off 34 ma Transmitter 5 watts at 12 0 volts all bands 10 Transmitter current 650 ma 40 M to 750 ma 20 M typical at 5 watts Spurs 50 dBc maximum all bands 5 to 40 wpm internal B mode iambic keyer Two 2...

Page 2: ...s can speed up the assembly and reduce mistakes Parts will be installed in order of height starting with resistors This way taller parts don t get in the way had they been installed first The placemen...

Page 3: ...Figure 3...

Page 4: ...5V Aluminum electrolytic 1 78L06 TO 92 6V reg 1 220 ufd 16V or 25V Aluminum electrolytic 4 8 pin DIP sockets 1 2N3906 PNP TO 92 plastic 1 14 pin DIP socket 4 2N7000 TO 92 plastic N MOSFET 1 28 pin DIP...

Page 5: ...YEL VOL ORG GLD R11 2 2 K RED RED RED GLD R35 100 K BRN BLK YEL GLD R12 1 MEG BRN BLK GRN GLD R36 470 K YEL VOL YEL GLD R13 1 MEG BRN BLK GRN GLD R37 100 K BRN BLK YEL GLD R14 1 MEG BRN BLK GRN GLD R...

Page 6: ...tic install later C26 101 100 pfd C47 Electrolytic install later C6 Electrolytic install later C27 4 7 pfd DISK C48 104 0 1 ufd C7 471 470p DISK C28 101 100 pfd C49 104 0 1 ufd C8 102 001 ufd DISK C29...

Page 7: ...70 Q4 FQP8P10 FQP8P10 TO 220 Mosfet U6 78L05 Check the number very carefully so as not to mix up with U8 U8 78L06 The electrolytic caps are installed laying flat to the board The value indicated on th...

Page 8: ...ill result in poor performance A turn is each time the wire passes through the center of the core Miss counting and having an extra turn is a common mistake and will result in low power output Make su...

Page 9: ...core then solder Cut an 18 length of the 26 wire and wind 6 turns inter weaved between the first winding and centered around the tap you just made so there are 3 turns on each side of the tap It is ea...

Page 10: ...erate switch is in the Operate position and the coax BLT switch is in the Coax position Plug in a paddle or straight key If using a paddle you can hold the dash paddle closed when turning the power on...

Page 11: ...r adjustment IF offset adjust and BFO trimmer set Once the MENU switch has been clicked the LED display now reads CAL o If you do not have an Oscilloscope do not make any adjustments to the IF offset...

Page 12: ...ith double sided tape which is already attached to the bottom of the holders Make sure you identify the front of the cabinet piece correctly Leave a small space between the sides of the battery holder...

Page 13: ...Two slide switches are used to select the operating band Both switches MUST be in the same band position for proper operation The band switch located near the top center of the cabinet tells the proce...

Page 14: ...h Tune Mode This mode is used if you want to key a steady carrier for measuring power output or when adjusting the antenna tuner However if you just need to tweak the tuner it is quicker and less stre...

Page 15: ...ck and hold close the MENU switch then tap the dash paddle to send message 1 or the Dot paddle to send message 2 then release the MENU switch If a message has not yet been stored releasing the MENU sw...

Page 16: ...e LED Now adjust the TUNE and see if you can make it even dimmer Go back to LOAD and see if this will dim the LED farther If no farther improvement can be made advance the TUNE slightly try clockwise...

Page 17: ...is always related to the output filter If there is no power output make sure the connections to L5 are good and that Q4 is turning on and off The IC voltage tables below might help in determining a pr...

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Page 19: ...Schematics pg1...

Page 20: ...Schematics pg2...