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QRPproject DL-QRP-AG, Manual

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QRPproject DL-QRP-AG Manual Download Page 30

Version: 13. Sepe

,m

er 2004

30

Section 9 RX/TX Mixer, Low pass filter

The following transistors may easy be damaged by ESD. Dont
forget to discharge yourself, use a potential free soldering
station.

The three leads of the BFR96 should be bent carefully down, the writing
should be readable, when the transistor is in place.

[  ] T9

BFR96(S)

E4

[  ] T10

BFR96(S)

D5

[  ] T11

BF244A

C/D5

For the mixer TUF 1 you have to be careful about short to the pc
board as with crystals. Mount it with the help of two pieces of cut
off resistor leads as help, and remember to remove them after
soldering! Remember to mount the mixer in proper direction. See-

ing it from below, note that the leads aren’t centred. At the component
side, you can see how to orient it. (Shown as the mixer as a transparent
object in the drawing).

[  ]M1

Mixer TUF1

D3/4

Now a few diodes, check their value with a loupe, not to mix
them up

.

[  ] D4

BA479

E/F3

[  ] D5

BA479

E3

[  ] D6

BA479

D3/4

[  ] D7

BA479

D4

[  ] D8

BA479

D/E4

Now the other type

[  ] D9

1N4148

F2/3

[  ] D10

1N4148

F2/3

[  ] D11

1N4148

F2

[  ] D12

1N4148

F2

SMCC RFCs are well known by now

[  ] Dr1

10µH

SMCC

F3

[  ] Dr2

47µH

SMCC

E3

[  ] Dr3

47µH

SMCC

D/E 3/4

[  ] Dr4

47µH

SMCC

E3/4

[  ] Dr5

10µH

SMCC

C/D 4/5

[  ] Dr9

10µH

SMCC

F3

and now a lot of caps.

[  ] C35

47nF

473

E4

[  ] C36

47nF

473

E4

[  ] C37

100nF

104

E3/4

[  ] C38

47nF

473

E4

[  ] C39

47nF

473

E3/4

[  ] C40

47nF

473

F2/3

[  ] C41

47nF

473

F3/4

[  ] C42

47nF

473

E3

[  ] C43

47nF

473

D3

[  ] C44

47nF

473

D3

[  ] C45

47nF

473

E3

[  ] C46

47nF

473

D4

[  ] C47

100nF

104

D5

[  ] C48

47nF

473

D5

[  ] C49

47nF

473

D/E5

[  ] C50

15pF

15p

D5

[  ] C51

47nF

473

C5

[  ] C52

10nF

103

C5

[  ] C73

150pF

151,n15

G2

[  ] C74

120pF

121;n12

G1/2

[  ] C75

120pF

121;n12

G1

[  ] C76

120pF

121;n12

G1

[  ] C77

120pF

121;n12

G1

[  ] C78

150pF

151;n15

H1

Summary of Contents for DL-QRP-AG

Page 1: ...DL QRP AG Speaky 5 Band CW SSB PSK Transceiver QRPproject Motzener Stra e 36 38 12277 Berlin http www QRPproject de Telefon 49 30 85 96 13 23 e mail support QRPproject de Manual fiservice Peter Zenker...

Page 2: ...Section 4 AF Amplifier 16 Testing Section 4 17 Section 5 Carrier osc and Switch 18 Testing Section 5 19 Section 6 BFO IF Amp AGC 20 Testing Section 6 21 Section 7 IF Amplifier IF Filter 22 Torroid Sc...

Page 3: ...56 20 by 20 mm squares Horizontally marked from A to H and verti cally 1 to 7 Every part is easy to find from this square grid At the end of each text section you will find a test description Please...

Page 4: ...r loudspeaker robust PA with 2 x 2SC1969 Transmitter output of 10W PEP switchable harmonics filter integrated speech compressor with a compression of max 15 1 please change this Modulationsklirrfaktor...

Page 5: ...he difference between the output frequency of IC2 and IC4 This voltage is smoothed in the loop filter of R3 R4 C1 and passed to the VCO to give equal phase of the two 66 kHz signals If the VFO frequen...

Page 6: ...ing of the IF signal to the IF filter We use a 4 pole 8 MHz Cohn filter with electronically adjustable filter band width The usual capacitors are replaced by capacity diodes BB112 The crystals are cho...

Page 7: ...dynamic range for 1 dB og output dynamic range The klirrfaktor please change of the output signal is less than 1 This compressor will allow the PA to swing to the QRP allowance of 10W PEP This gives...

Page 8: ...transmitter is followed by a 3 stage Chebychef low pass filter with a cut off frequency of 33 MHz to reduce harmonics in the BC TV bands by more than 60 dB The in band variation is a maximum of 0 3 d...

Page 9: ...tage all critical parts are supplied by a stabilized 10 V derived from the low drop regulator IC15 This concept limits the supply voltage for the transceiver to 10 8 to 15 Volts The 5 Volt regulator a...

Page 10: ...ith a loupe D32 is a comparatively large component D1 and D2 looks alike but have a printed marking The cathode is marked by a ring When diodes are mounted standing up it is always the cathode lead th...

Page 11: ...he pins Here you will mount a switch later on Testing Section 1 1 Visual inspection As a first test inspect every section with a loupe to find shorts Take this test seriously Even a master solderer ma...

Page 12: ...t a few values 101 100 pF 0 1nF 0 0001uF 102 1000 pF 1 0nF 0 001uF 103 10000 pF 10nF 0 01uF 104 100000pF 100nF 0 1uF 221 220pF 0 22nF 0 00022uF 222 2200pF 2 2nF 0 0022uF 223 22000pF 22nF 0 022uF 224 2...

Page 13: ...TO92 casings as the voltage regulators of section 1 Check the marking with a loupe to avoid mixing them up The mounting direction is shown in the placement diagram For the MOSFETs remember to dischar...

Page 14: ...As most cheap multimeters today measures capacitors to below 1 pF this should pose no problem Multimeters are offered by QRPProject at 29 Euro C13 1nF 102 C6 C14 8p2 8p2 C6 C15 220pF 221 n22 C6 C16 6...

Page 15: ...stors temporarily under the crystal as placeholders during soldering Remember to remove the resistor leads again after soldering Q1 4 096MHz HC18 B6 7 St3 connector A6 St4 connector A B7 PIN7 A B7 To...

Page 16: ...ave a strong 4 030 signal Method 2 Oscilloscope owners could inspect the signal at C13 It should be some 2 3 Vpp Method 3 With an absorbtion frequency meter or a grid dip meter in absorbtion position...

Page 17: ...2 PIN33 E3 PIN34 E3 PIN43 E F 1 2 PIN44 F1 2 PIN 8 D2 3 Test Building Group 4 BG 4 1 Visual inspection see Section 1 2 Resistance test see Section 1 Connect power supply as described at building Group...

Page 18: ...rs in a metal case Caution first compare the three terminals exactly with the respective holes on the pc board The trim potentiometers are gliding very easy into the holes if they are mounted right If...

Page 19: ...Neosid filter 7 1 F10b B1 22 turns 0 1mm lacquered copper wire AWG 38 We only have to put in 3 pins to finish this section pin 28 C D2 pin 29 D2 pin 38 E2 Test Section 5 1 Visual inspection see Secti...

Page 20: ...rize the tantalum capacitors correctly The long wire is PLUS C101 10 F 16V Tantalum pearl A B4 C102 1 F 35V Tantalum pearl B4 C104 10 F 16V Tantalum pearl B4 Mount the electrolytic capacitors correctl...

Page 21: ...e test see Section 1 current should be abt 85 mA 4 Functional test After switching on a definite noise should be audible in the phones If the pin 20 to ground bridge is removed the noise should decrea...

Page 22: ...und connections 4 pcs The following 5 diodes are in TO92 casings They look like transistor but only have to leads Mount according to the placement diagram D15 BB112 C4 D16 BB112 B4 D17 BB112 B4 D18 BB...

Page 23: ...next turn must be clockwise to get the right geometry for Tr7 If you start front to back you must wind counter clockwise This rule is only for Tr7 Developers have their oddities too Wayne the construc...

Page 24: ...turns Should calculations ever result in half turns you ignore the half turn and accept the slight asymmetry With unsymmetrical secondaries you put the secondary turns between the turns of the primar...

Page 25: ...oss R 57 If Mr Ohms law is correct and we get 10 mA you should see U RxI 220R x 0 01A 2 2V If you measure much more ore less the current is not ok and you must change the Resistor assuming Mr Ohms Law...

Page 26: ...Film E6 C2 10nF 103 D E7 C3 22nF 223 D7 C4 47nF 473 D7 C5 220pF 221 D7 C6 1nF 102 D E7 C7 10nF 103 C D7 C8 1nF 102 D6 7 C9 100nF 104 C D6 C10 100nF 104 E5 6 C11 100nF 104 B6 C12 220 F 16V rad B6 Now t...

Page 27: ...ard This should be made from isolated wire in square E4 E5 and soldered in This section cannot be tested yet as the band set oscillator and the VCO of the band modules are needed Put the main pc board...

Page 28: ...e is marked with a band or a dot The short leads are just long enough to con tact the corresponding holes in the PCB but long enough to go through the holes Because our PCBs are throughplated that doe...

Page 29: ...g The activation pins vor each band module are on the main board Which one you use is on yours the bandmodules are all in parallel but only one is actually activated by its corresponding activation pi...

Page 30: ...how to orient it Shown as the mixer as a transparent object in the drawing M1 Mixer TUF1 D3 4 Now a few diodes check their value with a loupe not to mix them up D4 BA479 E F3 D5 BA479 E3 D6 BA479 D3 4...

Page 31: ...inding for coils too Cut a 15 cm piece of 0 2 mm wire AWG 32 and feed it through the pig nose as shown in the diagram One turn is done by going through one hole and back through the other Make three t...

Page 32: ...st Section 9 1 Visual inspection see Section 1 2 Resistance test see Section 1 Bridge pin 47 to pin 18 Connect rotary encoder to the DDS Put pin 29 to 10 Volt see section 1 Put pin 19 to 10V Put pin 1...

Page 33: ...k proceed to section 10 Section 10 SSB Generator and SSB amplifier P13 22K Piher PT6 lying A1 2 P14 50k Piher PT6 lying A1 P15 220K Piher PT6 lying B1 P16 2 2K Piher PT6 lying B1 X IC17 SSM2165 1 SO8...

Page 34: ...n see Section 1 2 Resistance test see Section 1 3 Smoke test see section 1 Apply power as in section 1 test current about 240 mA 4 Functional test During the following test remove all bandmodules from...

Page 35: ...A H4 x R41 4 7R SMD H4 x R42 4 7R SMD H3 x R43 1R SMD H3 R44 270R 1 Watt Metal film G4 R45 5 6R H1 2 R46 10R G H3 R47 10R H3 X R48 1R SMD 1206 H2 X R49 1R SMD 1206 H2 X R50 1R SMD 1206 H2 X R51 1R SMD...

Page 36: ...fore mounting to remove the lacquer It is easier if the wires are long enough for them to be held firmly to the pc board during soldering Tr3 QRP double hole core G H4 Repeat this for transformer Tr4...

Page 37: ...re well distributed over an Amidon FT50 43 Take note of the necessary geometry Dr8 Amidon FT50 43 F G1 That should be all The rest is just trimming Instead of another section test I recommend that the...

Page 38: ...D E3 pin 33 E3 pin 34 E3 pin 35 10VS F3 pin 36 10V F3 pin 37 POut Anz F2 pin 38 E2 pin 39 10VE E2 pin 40 10VS E1 pin 41 Ue_ E1 2 pin 42 Us_ E1 2 pin 43 E F 1 2 pin 44 F1 2 pin 45 PWR ON E F1 pin 46 P...

Page 39: ...e core of L7 higher or try a 22 H coil in parallel to L7 Re peat steps 5 6 and 7 8 The lower voltage on the output of IC12 corresponds to the LSB carrier frequency the higher one to the USB carrier fr...

Page 40: ...ency range resolving and sensi tivity are always identical We were looking for a multiple usable counter which could be used as a single device but also as a module for a multi functional set Finally...

Page 41: ...ming a frequency shift Counting mode In counting mode is made a difference between direct counting and coun ting with frequency shift Switching between these modes is possible without a reset of the c...

Page 42: ...terminals must turned backward by 90 Backward means away from the labelled side IC3 7805 Socket IC1 74HC00 Socket IC2 16F84A D1 N4148 D2 1N4146 P1 1 x 10k Piher PT10 Resistor Array 1 5x4k7 CAUTION PI...

Page 43: ...ether and tightened with screws and distance bolts to one unit Terminator J2 will be connected to 12 Volts and ground coming from the basic unit J4 is connected to the display backlight switch and J1...

Page 44: ...lio trimmer violet C12 10nF C13 2 5 60pF Folio trimmer black C14 2 5 60pF Folio trimmer black C15 22nF C16 12pF C17 12pF C18 47nF C19 47nF C20 56pF C21 22nF C22 270pF on PC board soldering side C23 27...

Page 45: ...0 45pF Folio trimmer 7mm violet C12 10nF C13 2 5 60pF Folio trimmer 7mm black C14 2 5 60pF Folio trimmer 7mm black C15 10nF C16 10pF C17 10pF C18 22nF C19 22nF C20 27pF C21 10nF C22 150pF on PC board...

Page 46: ...35pF Folio trimmer 7mm brown C12 10nF C13 2 0 45pF Folio trimmer 7mm violet C14 2 0 45pF Folio trimmer 7mm violet C15 10nF C16 3 3pF C17 3 3pF C18 10nF C19 10nF C20 27pF C21 10nF C22 56pF on PC board...

Page 47: ...1 8 30pF Folio trimmer 7mm Diameter red C12 10nF C13 2 0 35pF Folio trimmer 7mm Diameter brown C14 2 0 35pF Folio trimmer 7mm Diameter brown C15 10nF C16 2 7pF C17 2 7pF C18 10nF C19 10nF C20 27pF C21...

Page 48: ...5pF C10 100pF C11 1 8 30pF Folio trimmer 7mm red C12 10nF C13 1 8 30pF Folio trimmer 7mm red C14 1 8 30pF Folio trimmer 7mm red C15 10nF C16 2 2pF C17 2 2pF C18 10nF C19 10nF C20 22pF C21 10nF C22 33p...

Page 49: ...voltages Therefore they were substituted by ceramic or multilayer capacitors of high quality with a 1 10 raster and are soldered on the PC board directly Parts List Part Value Material C1 1000pF NP0...

Page 50: ...SOLF DK1HE 40m 30m 20m 17m zur Antenne 15m 12m 10m Rel1 Rel2 Rel3 Rel4 Rel5 Rel6 Rel7 L1 L2 L3 L4 L5 L6 L7 L8 L9 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 Dr1 Dr2 Dr3 Dr4 C15 C18 C20 C22 C24 C27...

Page 51: ...Version 13 September 2004 51 upper side lower side...

Page 52: ...0dB 10dB S11 10Log P 50dB Marker f 10 965MHz Trace1 0 2dB Trace2 13 7dB Start 1MHz Stop 100MHz 101 points RFSim99 D Eigene Dateien _PM_Manuals SPEAKY TPF17m cct 10dB S21 10Log P 50dB 10dB S11 10Log P...

Page 53: ...Version 13 September 2004 53...

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