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A GUIDE TO

USING

THE TARGET HF3

RECEIVER

S

H

0

RT W AV E

L I E N I N G

0

BY

ALAN. J.

MULLEY

1

1
2
3
...
»

Summary of Contents for HF3

Page 1: ...A GUIDE TO USING THE TARGET HF3 RECEIVER SH0RT WAVE LISTENING r 0 BY ALAN J MULLEY luIQ 1...

Page 2: ...e is made to a stationswavelength rather than it s frequency High frequency signals have short wavelengths and low frequency signals have long wavelengths The frequency of a signal in kHz is given by...

Page 3: ...equencies between 1 6 MHz and 30 MHz are referredto as Short Waves S W MW sw I The HF3 covers all of these bands in one continuous sweep with steps of 1 kHz Numbersto the left of the decimal point are...

Page 4: ...ct directly to any Mains Supply without the aid of a qualified Electrician Plug the 12 Volt line from the power supply into the receiver plug in the antenna and set the attenuator on the rear of the r...

Page 5: ...re crowded with domestic and foreign broadcast stations When tuning a station rotate the tuning knob to obtain the highest number on the Signal Strength Meter Tune between 300 and 400 kHz for marine a...

Page 6: ...fully then the result of the modulationproduces a carrier an upper sideband of frequencies and a lower sideband of frequencies All this takes up space on the radio spectrum Now since the upper and low...

Page 7: ...uses overload and distortionthen switch the attenuator to the ATTEN position Remember to switch it back to normal for weaker stations The HF3 has been designed to handle comparatively large signals at...

Page 8: ...ncies in kHz Voice of Vietnam NorwegianRadio Radio Kuwait BBC World Service Brazil Radio Radio Netherlands Voice of Russia RadioThailand Voice of Israel Jerusalem Voice of America Romania Radio RAI In...

Page 9: ...gular language courses Details on World Service broadcasts There are many Comprehensiveguides availablegiving Frequencies and scheduled transmission times Make sure that you get an up to date copy as...

Page 10: ...eceiver then use 70 ohm co ax TV Aerial cable between the receiverand the antenna If an outside antenna is not practical then the antenna can be fitted as high as possible in the loft Reasonable resul...

Page 11: ...ions may be poor wait until conditions improve Check the antenna wire re site the antenna if necessary HIGH LEVELSOF INTERFERENCEARE EXPERIENCED Locatethe source of interferenceif possible Turn off al...

Page 12: ...is commonly called slope detection DISPLAY SHOWS RANDOM CHARACTERS A supply transient could upset the internal processor If turning the tuning knob does not clear the problem then press RST This perfo...

Page 13: ...nna Socket Power Socket Clockwise on Continue for volume increase Set at centre blue mark up tune either side of centre Displays selected Mode only Bar Graph increaseswith received Signal Strength Ros...

Page 14: ...hown inthe user guide Withthe computer and its peripheralsturned off tune the receiver to a localfacsimilestation Forthe UK the most usefulstations are BRACKNELL on 4610 8040 14436 KHZ NORTHWOOD on 23...

Page 15: ...noise is being conducted along the shield of the cable A data lead with an inline filter is available at most radio supply stores RECEIVINGPICTURES With the computer in DOS and the C prompt displayedt...

Page 16: ...t the picture The blips will create a vertical line somewhere at the top of the screen Using the c or key move this line until it is off the screen either to the left or right When the blips stop the...

Page 17: ...re received This correspondsto the upper and lower frequencytones of the signal Usingthe keys movethe red line untilit is central betweenthe peaks Press Hagain to returnto the display page Some statio...

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