Ten-Tec_1253_user_2012.pdf

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1、KIT by TEN-TEC INSTRUCTION MANUAL Americas Best! 9-BAND SHORTWAVE RECEIVER Electronic switching of 9 bands in 1.8-22MHz range, with front panel RF gain and fine tuning; plus outstanding speaker/headphone audio No. 1253 Complete T-KIT with Enclosure 74327 T-KIT Manual No.74327 Kit Assembly and Instru

2、ction Manual for T-KIT Model No. 1253 9-Band Shortwave Receiver TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . TABLE OF DIAGRAMS AND CHARTS: Block diagram of circuit . . . . . . . . . . . . . . . . . . . . . . . Circuit Board X-Ray View . . . . . . . . . . . . . . . . . . . . . Subpan

3、el assembly . . . . . . . . . . . . . . . . . . . . . . . . . . Bandswitch Board X-Ray View please also see the final Q simply keep L6 with the other inductors until they are installed all together. 1253 - 18 PHASE 1 Audio Amplifier Section 1-1a. Carefully identify C12, a .1 F mylar film capacitor.

4、It is marked 104 and has a dark, shiny somewhat rectangular body, quite different from the many ceramic disc capacitors also used in the kit. 1-1b. Install mylar film capacitor C12 per 1-1a. 1-2. Install C15, also .1 F and marked 104, but is a ceramic disc type. 1-3. Install C13, 100 pF, marked 101.

5、 1-4. Install C19, .01 F, ceramic disc type marked 103. 1-5. Install C9, also .01 F ceramic disc. Before soldering any of the following resistors, make certain that you have selected the correct value. Pay close attention to the color of the third multiplier band, so that you dont confuse 470, 4.7K

6、and 47 K, etc. Also dont confuse R18 or R23 with L6 - see note on previous page. Identify and install the following resistors: 1-6. Resistor R23, 3.3 ohms (orange-orange-gold) 1-7. Resistor R18, also 3.3 ohms. 1-8. Resistor R14, 270 ohms (red-violet-brown) 1 -9. Resistor R16, 470 ohms (yellow-violet

7、-brown) 1-10. Resistor R11, 4.7K (yellow-violet-red) 1-11. Resistor R12, 47 K (yellow-violet-orange) 1-12. Resistor R10, 1K (brown-black-red) 1-13. Resistor R13, 10K (brown-black-orange) 1-14. Identify correctly and insert Q4, transistor type 2N4124G, into its position, making sure that its flat sid

8、e is oriented per the board outline. Press the transistor as far into its holes as it reasonably will go and solder all three connections. 1-15. Examine electrolytic capacitor C17, 220 F. Notice that one wire is longer: this is the (+) side. The (-) side is marked by the dark band stripe down the si

9、de of the capacitor. This and all other electrolytic capacitors in the kit MUST be installed with the (+) side corresponding to the + marked on the board. 1-16. Install C17, 220 F electrolytic, per Step 1-15. 1253 - 19 1-17 Install C16, 470 F electrolytic, per Step 1-15. 1-18. Install C14, 33 F elec

10、trolytic, per Step 1-15. 1-19. Install C30, 100 F electrolytic, per Step 1-15. 1-20. Install C11, 1 F electrolytic, per Step 1-15. 1-21. Install C10, 470 F electrolytic, per Step 1-15. 1-22. Using a length of bare wire cut from a part already installed, form a staple-shaped bridge wire and solder it

11、 at the two points joined by the dotted line marked JUMPER near C17. 1-23. Install R17, the 10K volume control potentiometer. Before soldering, make sure it is seated squarely on the board, to assure a neat fit to the subpanel. 1-24. Notice that U1, the 9-pin TDA2611A integrated audio amplifier circ

12、uit, has a notch and stripe at one end of the imprinted side, designating pin 1. Carefully insert U1 into its position with that notched end in the same direction as the stripe outlined on the board (i.e., near C17). 1-25. Solder all 9 pins of U1, being sure not to drip excess solder across any of t

13、he pins (solder bridge.) 1-26. Double check the correctness of parts selection and parts-orientation in steps 1-1 through 1-25. At this point, you have installed all parts needed for U1 and Q4 to function as the receivers audio amplifier. This circuit can be tested at this time by connecting DC volt

14、age and the speaker. The value of this test is that you can be assured that the amplifier circuit indeed is working properly. A potential disadvantage is that the four hookup wires installed for the test could become weakened at their solder points from the repeated handling of the board required by

15、 further assembly. Therefore, the decision to test the amplifier before proceeding depends on your confidence in the work done so far. lf you do perform the test, be sure to follow the suggestion in Phase 2 for tucking the wires out of the way. Preparation for Optional Audio Amplifier Test: 1-27. NO

16、TE: When we say to prepare a length of hookup wire , this means to CUT the correct length of the specified color and to STRIP about 1/8 of insulation from each end. To assure neat wiring of the finished receiver, it is important to cut the wire lengths as specified. lf any wires are too short, they

17、will interfere with installing the battery shelf assembly. 1253 - 20 1-28. Prepare a 5.5 length of BLACK wire and solder one end to the (-) side of “Vcc EXT. 1-29. Prepare a 4.0 length of RED wire and solder one end to the pad in the Power Switch nearest the position for R15. 1-30. Prepare a 5.5 len

18、gth of WHITE wire and solder one end to the (+) pad on the AUDIO OUT box outlined on the board. 1-31. Prepare a 5.5 length of BLACK wire and solder one end to the other (ground) pad in the AUDIO OUT box. 1-32. Lightly solder the white (+) and black (-) wires from AUDIO OUT to the(+) and(-) lugs of t

19、he 3 speaker in your kit. Because this is a temporary connection, you also may use alligator clip jumper wires. These two wires will be soldered permanently to the phone jack later. Phase 1 Optional Progress Test The purpose of this test is to make sure that the amplifier section is working property

20、. If it does not, installing more parts will not fix it! 1-33. DOUBLE-CHECK all preceding assembly steps. 1-34. Connect any 11-14 volt DC voltage source to the red (+ ) and black (-) wires. 1-35. Turn the volume control all the way up. At this point you should be hearing a gentle background hiss and

21、 perhaps a soft AC hum. Now, touch one end of R10 with your finger or a voltmeter test lead: you should hear a strong AC hum. Rotating the volume control will have the same effect as any volume control. These are the ONLY sounds you should hear. There must NOT be any popping, putt-putting or squeali

22、ng. If there are ANY such sounds, it means that the amplifier is oscillating, caused by some error in preceding steps. Make sure you have the amplifier working properly before proceeding. 1-36. Disconnect the battery or power supply. 1-37. Disconnect the speaker. 1253 - 21 PHASE 2 DC Voltage Control

23、 and Regulation 2-1. Install diode D11, type 1N4002, making sure that its banded cathode end is oriented as outlined on the board. 2-2. Install diode D12, type 1N4002, per step 2-1. 2-3. Install resistor R15, 3.3K (orange-orange-red). 2-4. Gently loop the 4 wires installed for the Phase 1 audio test

24、 around the body of the R17 volume control so that their connections will not be weakened during further assembly. Install the following resistors: 2-5. Resistor R26, 560 ohms (green-blue-brown). 2-6. Resistor R27, 4.7K (yellow-violet-red). 2-7. Resistor R24, 22K (red-red-orange). 2-8. Resistor R9,

25、10K (brown-black-orange). 2-9. Referring back to Step 1-14 as needed, install Q5, the other MPS6514 transistor supplied with your kit. 2-10. Review Step 1-15 regarding the correct installation of ELECTROLYTIC capacitors, noting that the ( + ) side for each capacitor is clearly marked on the board. 2

26、-11. Install C33, 33 F electrolytic, per Steps 2-10, 1-15. 2-12. Install C32, 100 F electrolytic, per Steps 2-10, 1-15. 2-13. Install C29, 10 F electrolytic, per Steps 2-10, 1-15. 2-14. Examine U2, the 3 pin type 7805 voltage regulator. It must be installed with its imprinted side facing R27. The li

27、ne within its board outline designates the bare metal heatsink side. 2-15. Install voltage regulator U2 per step 2-14. 2-16. Referring to Step 1-22 as needed, install a bare wire jumper at JUMPER near R20A. (NOTE: R20A, R20B, and R20C are the connecting points for the main tuning control.) 2-17. Dou

28、ble-check your work in Steps 2-1 to 2-16. This completes the wiring of the DC voltage regulation circuitry. While the output of U2 could be checked for 8 volts, no testing is necessary at this point. 1253 - 22 PHASE 3 RF Amplifier, Regenerative Detector, Varactor Tuning 3-1. Varactor diode D10 is ea

29、sy to identify; it looks like a transistor, but with only two leads, and is clearly stamped MV209. Before soldering D10, make sure its flat side is aligned just like the board outline and that its body is snugly against the top of the board. 3-2. Install Transistor Q1, FET type J310. Before solderin

30、g, be sure that its flat side faces C2 as outlined on the board. Also, before soldering, make Sure Q1s leads are pushed into the board holes as far as possible, placing the transistors body as close to the board as reasonably possible. 3-3. Install transistor Q2, FET type J310, per step 3-2. 3-4. In

31、stall transistor Q3, FET type J310, per step 3-2. 3-5. Referring back to step 1-15 as needed, install C5, a 1 F electrolytic capacitor, correctly aligning its (+) side. 3-6. Install 1 F electrolytic C31 per Step 3-5. 3-7. Press R6, 100K regeneration trimmer pot, into its position. The preformed legs

32、 lock it into position for easy soldering. Do NOT try to jam the trimmers body flush against the board. Solder all three legs. As you did in Phases 1 and 2, be sure to correctly identify the following resistors before soldering. Install the following: 3-8. Resistor R3, 10 ohms (brown-black-black). 3

33、-9. Resistor R7, 1K (brown-black-red). 3-10. Resistor R25, 1.5K, (brown-green-red). 3-11 . Resistor R8, 470 (yellow-violet-brown). 3-12. Resistor R2, 680, (blue-gray-brown). 3-13. Resistor R19, 10K (brown-black-orange). 3-14. Resistor R4, 1 megohm (brown-black-green). 3-15. Resistor R22, also 1 mego

34、hm. 3-16. Set aside the 9 .01 1tF mylar capacitors to be used for C20-C27 in Phase 6. These capacitors are marked 103 and are easily recognized by their dark, shiny rectangular bodies. 1253 - 23 Install the following ceramic disc capacitors. * Be sure NOT to use any of the .01 F mylar capacitors req

35、uired for C20-C27: 3-17 Capacitor C2, 33 F. 3-18. Capacitor C1, 100 pF (marked 101). 3-19. Capacitor C18, 220 pF (marked 221). 3-20. Capacitor C4, .01 F (marked 103) * 3-21. Capacitor C6, also .01 F. * 3-22. Capacitor C7, also .01 F. * 3-24. Capacitor C3, also .01 F. * 3-25. Capacitor C8, .1 F (mark

36、ed 104). 3-26. Install RF Gain control, 10K potentiometer R1, seating the control squarely on the board before soldering. This is important to assure a good fit to the aluminum subpanel. 3-27. Install Regeneration Control R5 per Step 3-26. 3-28. Install Fine Tuning Control R21 per Step 3-26. 3-29. C

37、oaxial Cable Preparation: A. B. C. D. Strip 1/2 of the outer black insulation from each end of the RG 174 mini coax cable. Gently unravel the exposed braids and twist the strands to form single stranded conductors. C. Strip 1/8 of the inner insulation from the center conductor at each end. Lightly t

38、in the exposed braids and center conductors. 3-30. Solder one end of the cable prepared in 3-29 to the ANTENNA points near the RF Gain control: the center conductor is soldered to the IN pad, and the braid is soldered to GND. 3-31. Gently slip the subpanel over the shafts and bushings of the four bo

39、ard-mounted controls until it is flush against the fronts of the controls. Notice how the locking pins should fit into the small holes of the subpanel. (Do NOT mount washers and nuts yet.) 1253 - 24 3-32. Notice how the bottom lip of the subpanel covers the first half-inch or so of the entire front

40、of the board Remove the subpanel, because NOW is the time to check this front area of the board for: Correct parts selection Solder joint touchup Wires properly trimmed to prevent shorting Solder bridges Correct soldering of controls so their locking pins fit the corresponding holes of the subpanel

41、No loose strands of coax braid shorting to other points on the board 3-33. At this point, you have installed all regeneration circuit parts except L10 and C43. Before proceeding, please study Detail 3-44: Note on L10 and C43 at the end of this section. 3-34. Capacitor C43 installed not installed Per

42、 3-44. 3-35. Inductor L10 installed not installed date_ 3-36. After performing all inspections of the front area of the board explained in Step 3-32, mount the subpanel to the board using a washer and 5/8 nut for each control. 3-37. Mount the Main Tuning control (R20) in its position on the subpanel

43、 using the remaining washer and nut. 3-38. Prepare three 4.0 lengths of WHITE hookup wire, referring to Step 1-27 as needed. 3-39. Solder one end of each of the three white wires to each of the three lugs of the Main Tuning control. 3-40. Solder the wire from the lug nearest the large opening for th

44、e bandswitch board to R20A on the board. 3-41. Solder the wire from the center (wiper) lug to R20B. 3-42. Solder the remaining wire to R20C. 3-43. Use any kind of tape to temporarily secure the antenna coax to the subpanel during further assembly. It is important that the solder connections not be s

45、tressed by repeated cable movement. 1253 - 25 Detail 3-44: Note on L10 and C43 These two components are additions to the original circuit: the receiver works quite well without them. Adding L10 and C43 results in a significant boost in receiver sensitivity to weak signals but also requires somewhat

46、more careful adjustments of the Regeneration Control. If this is your first experience with regenerative receivers, we suggest that you omit L10 and C43 for now and gain real familiarity with the receivers operation. Consider adding these parts later if your listening interests begin to include look

47、ing for weak CW or SSB signals on bands which are nearly deserted because of time of day or sunspot conditions. If those same bands are busy with strong signals, the receiver works fine without L10 and C43, to the extent that the RF Gain control setting will need to be reduced considerably. The extr

48、a sensitivity offered by this circuit addition also can permit the use of shorter antennas such as telescoping whips for portable operation. Adding L10 and C43 later will require a major dismantling of the receiver, including removal of the subpanel installed in Step 3-36. However, an easier approac

49、h is possible which also permits you to try out the increased regeneration sensitivity without committing to it permanently. For now, install C43 in the normal manner. By itself, it will have no effect on receiver operation. ln the position marked on the board for L10, solder two bare wires extending about 1/2 above the board. Whenever you wish, L10 can be soldered to these two wires after removing only the top cover shell and battery shelf . This will allow you to compare receiver performance with and without C43 and L10. Inductor L