Radiotelephone signals in a frequency band below ____ MHz cannot be automatically retransmitted, unless these signals are received from a station operated by a person qualified to transmit on frequencies below the above frequency:
You have connected your hand-held VHF transceiver to an outside gain antenna. You now hear a mixture of signals together with different modulation on your desired frequency. What is the nature of this interference?
Your mobile HF transceiver draws 22 amperes on transmit. The manufacturer suggests limiting voltage drop to 0.5 volt and the vehicle battery is 3 metres (10 feet) away. Given the losses below at that current, which minimum wire gauge must you use?
Number 12, 0.11 V per metre (0.03 V per foot) (30% chose this)
Number 8, 0.05 V per metre (0.01 V per foot) (17% chose this)
Number 10, 0.07 V per metre (0.02 V per foot) (39% chose this)
Number 14, 0.19 V per metre (0.06 V per foot) (14% chose this)
A communications receiver has four filters installed in it, respectively designated as 250 Hz, 500 Hz, 2.4 kHz and 6 kHz. You are copying a CW transmission and there is a great deal of interference. Which one of the filters would you choose?
A television receiver suffers interference on channel 5 (76 - 82 MHz) only when you transmit on 14 MHz. From your home you see the tower of a commercial FM station known to broadcast on 92.5 MHz. Which of these solutions would you try first?
Insert a low pass filter at the antenna connector of the HF transmitter (24% chose this)
Insert a high pass filter at the antenna connector of the HF transmitter (12% chose this)
Insert a low pass filter at the antenna connector of the television (14% chose this)
Insert a high pass filter at the antenna connector of the television (51% chose this)
The operator of an amateur station, who is the holder of a Basic Qualification, shall ensure that the station power, when expressed as RF output power measured across an impedance matched load, does not exceed:
150 watts peak power (23% chose this)
560 watts peak-envelope power, for transmitters producing any type of single sideband emission (64% chose this)
2500 watts peak power (1% chose this)
1000 watts carrier power for transmitters producing other emissions (11% chose this)
Two mobile stations are traveling along the same road in close proximity to each other and having trouble communicating through a local repeater. Why may it be necessary to use simplex operation to communicate between these cars?
The strong signal of one mobile transmitter may desensitize the receiver of the other mobile receiver (61% chose this)
Simplex operation does not require the use of CTCSS tones (7% chose this)
There is less time delay using simplex operation compared to using a repeater (14% chose this)
There are many more simplex frequencies than repeater frequencies available (18% chose this)
The holder of an Amateur Radio Operator Certificate with Basic Qualification is limited to a maximum of _______ watts when expressed as direct current input power to the anode or collector circuit of the transmitter stage supplying radio frequency energy to the antenna:
If a parasitic element slightly longer than a horizontal dipole antenna is placed parallel to the dipole 0.1 wavelength from it and at the same height, what effect will this have on the antenna's radiation pattern?
A major lobe will develop in the horizontal plane, parallel to the two elements (23% chose this)
A major lobe will develop in the vertical plane, away from the ground (6% chose this)
The radiation pattern will not be affected (8% chose this)
A major lobe will develop in the horizontal plane, from the parasitic element toward the dipole (63% chose this)
Your amateur radio transmitter appears to be creating interference to the television on channel 3 (60-66 MHz) when you are transmitting on the 15 metre band. Other channels are not affected. The most likely cause is:
a bad ground at the transmitter (1% chose this)
front-end overload of the TV (13% chose this)
harmonic radiation from the transmitter (68% chose this)
In order to install any radio apparatus, to be used specifically for receiving and automatically retransmitting radiotelephone communications within the same frequency band, a radio amateur must hold an Amateur Radio Operator Certificate, with a minimum of:
Basic and Morse code qualifications (1% chose this)
Basic qualification (17% chose this)
Basic with Honours qualification (8% chose this)
Basic and Advanced qualifications (75% chose this)
FM receivers perform in an unusual manner when two or more stations are present. The strongest signal, even though it is only two or three times stronger than the other signals, will be the only transmission demodulated. This is called:
In order to install any radio apparatus, to be used specifically for an amateur radio club station, the radio amateur must hold an Amateur Radio Operator Certificate, with a minimum of the following qualifications:
If a parasitic element slightly shorter than a horizontal dipole antenna is placed parallel to the dipole 0.1 wavelength from it and at the same height, what effect will this have on the antenna's radiation pattern?
A major lobe will develop in the horizontal plane, from the dipole toward the parasitic element (68% chose this)
A major lobe will develop in the horizontal plane, parallel to the two elements (22% chose this)
A major lobe will develop in the vertical plane, away from the ground (7% chose this)
The radiation pattern will not be affected (4% chose this)
A transformer has a 240 volt primary that draws a current of 250 milliamperes from the mains supply. Assuming no losses and only one secondary, what current would be available from the 12 volt secondary?
Which of the following is defined in EMCAB-2 as "any device, machinery or equipment, other than radio apparatus, the use or functioning of which is, or can be, adversely affected by radiocommunication emissions"?
In general, what is the tallest amateur radio antenna system excluded from the requirement to consult with the land use authority and the public where there is a land use authority defined public consultation process?
21m (3% chose this)
the taller of the height exclusion in the land use authority public consultation process and Innovation, Science and Economic Development Canada's antenna siting procedures (78% chose this)
You are transmitting FM on the 2 metre band. Several stations advise you that your transmission is loud and distorted. A quick check with a frequency counter tells you that the transmitter is on the proper frequency. Which of the following is the most probable cause of the distortion?
The power supply output voltage is low (11% chose this)
The repeater is reversing your sidebands (5% chose this)
The frequency counter is giving an incorrect reading and you are indeed off frequency (9% chose this)
The frequency deviation of your transmitter is set too high (75% chose this)
If you are the net control station of a daily HF net, what should you do if the frequency on which you normally meet is in use just before the net begins?
Cancel the net for that day (7% chose this)
Call and ask occupants to relinquish the frequency for the scheduled net operations, but if they are not agreeable, conduct the net on a frequency 3 to 5 kHz away from the regular net frequency (90% chose this)
Reduce your output power and start the net as usual (1% chose this)
Increase your power output so that net participants will be able to hear you over the existing activity (2% chose this)