Serious ‘XM (That’s W2XM) presents

1. Serious ‘XM(That’s W2XM)presents Exam-prep Jepperdee: Extra-class Edition

2. Announcements Introduction of presenter

3. Operation of the game is almost intuitive, and you can make up your own rules. Each numeric point value on either game board is a hyperlink which reveals a question. Advancing the game one slide past the question (by clicking the screen) displays the answer. “Back” on the answer slide returns you to the game board. “SFJ” stands for “semi-final jepperdee” and “FJ” means “final jepperdee;” proceed from SFJ or FJ by clicking screen until you see the next hyperlink. There is one daily double on each board; click on “Here’s the question.” For most fun, appropriate hardware (lights, push-buttons, sounder, lockout circuitry) should be used. A diagram is available from the author.

6. E2C06 During a VHF-UHF contest, in which band segment would you expect to find the highest level of activity? back

7. The weak-signal segment of the band, with most of the activity near the calling frequency back

8. E2C07 What is the Cabrillo format?

9. A standard for submission of electronic contest logs back

10. E2D07 Which digital protocol is used by APRS: PACTOR, 802.11, AX.25, or AMTOR?

11. AX.25 back

12. E2A02 What is the direction of a descending pass for an amateur satellite?

13. From north to south back

14. E2A09 What do the terms L band and S band specify with regard to satellite communications?

15. The 23-cm and 13-cm bands back

16. E1A05 What is the maximum power output permitted on the 60 meter band?

17. 100 watts PEP effective radiated power relative to the gain of a half-wave dipole back

18. E1C01 What is a remotely controlled station?

19. A station controlled indirectly through a control link back

20. E1D08 Which VHF amateur-service bands have frequencies available for space stations?

21. 2 meters back

22. E1F14 When/why might the FCC issue "Special Temporary Authority" (STA) to an amateur station?

23. To provide for experimental amateur communications back

24. E1B05 What is the maximum bandwidth for a data emission on 60 meters?

25. 2.8 kHz back

26. E6D08 Why use powdered-iron toroids rather than ferrite ones in an inductor?

27. Powdered-iron toroids generally maintain their characteristics at higher currents back

28. E5B04What is the time constant of a circuit having two 220-μF caps and two 1-MΩ res., all in parallel?

29. 220 seconds back

30. E5A08 What is the phase between the I through and the v across a series resonant circuit?

31. The voltage and current are in phase back

32. E5C04 Expressed in polar, what is the z of a 400-Ω reactance cap in series with a 300-Ωresistor?

33. 500 ohms at an angle of -53.1 degrees back

34. E5D12 How many watts are consumed in a circuit having a p.f. of 0.2 if the input is 100-V AC at 4 A?

35. 80 watts back

36. E6A08 What do we call the freq. at which the grounded-base cur-rent gain of a transis-tor is .7 X the gain at 1 kHz?

37. alpha cutoff frequency back

38. E6E06 What charac-teristicsof the MMIC make it a good choice for VHF-through-microwave circuits?

39. Controlled gain, low noise figure, & constant in and out Z’s over a given frequency range back

40. E6D13 What type of CRT deflection is best when high-frequency waveforms are to be displayed?

41. Electrostatic back

42. E6B04 What type of semiconductor device is used as a voltage-controlled capacitor?

43. Varactordiode back

44. E6D06 What property of the core material determines the inductance of a toroidal inductor?

45. Permeability back

46. E7B12What is this?

47. Common emitter amplifier back

48. E6E10 What is the equivalent circuit of a quartz crystal?

49. Motional C, motional L, and loss R all in series; with a shunt C representing elect-rode and stray C back

50. E7H13 Define “capture range” of a phase-locked loop circuit?