Palstar R30A Owner'S Manual Download Page 10

 

10 

Front Panel Functions 

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The bandwidth automatically switches to the width appropriate for 
the reception mode selected by the MODE button, but the oppo-
site bandwidth can be selected by pushing the BW button once. 
Pressing BW again will return to the previous setting. 
 

8.  AGC (Automatic Gain Control) Button - 

Switches between 

Fast and Slow AGC response time.

 The indicator is lit when AGC 

responses time is FAST. For most normal reception, AGC re-
sponse time should be SLOW. The primary use for the FAST re-
sponse time is when listening to CW (Morse code) stations. 
 

9.  ATTenuator Button

 - 

Switches in 10 dB of attenuation to pre-

vent overloading of the receiver by strong local stations. 

The indi-

cator is lit when attenuation is ON. For most normal reception, at-
tenuation should be OFF. 
 

10.  Headphone Jack

 - A standard 1/4” monaural phone plug (2 

conductor) is provided to enable listening without disturbing oth-
ers. The headphone jack is designed for use with 8 ohm monaural 
headphones. If stereo headphones are used, the sound will only 
be heard in one ear. When headphones are plugged in, the inter-
nal speaker (of external speaker, if one is in use) is disabled. 

 

World Time        

19

 

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The Amateur Radio bands are as follows: 
 

Frequency in kHz 

Band Name

 

  3500-4000 

 

  80 Meters 

  7000-7300 

 

  40 Meters 

10100-10150 

 

  30 Meters (CW/Data only) 

 

   

14000-14350 

 

  20 Meters 

18068-18168 

 

  17 Meters 

21000-21450 

 

  15 Meters 

24890-24990 

 

  12 Meters (Shared with Fixed Service) 

28000-29700 

 

  10 Meters 

 

 

Other Services 

 
The Shortwave spectrum is also home to many other radio ser-
vices, including ship-to-shore, transoceanic airlines, government, 
military, and others. Often called “Utility Stations” or “Utes” for 
short, their transmission modes include CW, AM voice, SSB voice, 
radio teletype and data. The monitoring of Utes is a specialized 
and rapidly changing area of the SWL hobby. It is beyond the 
scope of this guide to provide more details, but there are books, 
magazine columns, newsletters, and internet webpages if you 
want more information. 
 

World Time

 

 
Let’s say you want to listen to a BBC newscast at 5pm. But, is that 
5pm in London where the program originates, 5pm in Southeast 
Asia where the BBC relay transmitter is located, or 5pm in New 
Zealand, where the intended audience lives? 
To eliminate such problems, shortwave broadcast schedules are 
kept in World Time. World Time is the local time at the Prime  
Meridian, zero degrees of longitude, which runs through 
Greenwich, England. 
 
 In the past, World Time was known as Greenwich Mean Time, 
today it is usually called Coordinated Universal Time, abbreviated 
as UTC. The military designates UTC with the letter “Z” and refers 
to it as “Zulu”, which is the phonetic pronouncer for “Z.” UTC is a 
24 hour clock and the times are written in four digits with no punc-
tuation. Thus, midnight is 0000 hours, 1pm is 1300 hours, and so 
on. 

Summary of Contents for R30A

Page 1: ...ney Rd Piqua OH 45356 USA Customer Service and Sales Telephone 1 800 773 7931 Fax 1 937 773 8003 Email info palstar com Version 1 1 August 15 2008 Copyright 2008 Palstar Inc Printed in the U S A R30A SHORTWAVE RECEIVER Owner s Manual ...

Page 2: ...R SERVICING TO QUALIFIED PERSONNEL ONLY CAUTION TO PREVENT ELECTRIC SHOCK DO NOT USE THE THREE WIRE CORD WITH AN EXTENSION CORD RECEPTIACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE An appliance and cart combination should be moved with care Quick stops exces sive force and uneven surfaces may cause the appliance and cart combination to overturn The lightnin...

Page 3: ...ontrols that are covered by the operating instructions An improper adjust ment may result in damage and will often require extensive work by a qualified technician to restore the product to its normal operation e If the product has been dropped or the cabinet has been damaged f When the product exhibits a distinct change in performance this indicates a need for service 19 Replacement Parts when re...

Page 4: ...z to 2 MHz AM 2 µV SSB 5 µV 2 MHz to 30 MHz AM 1 µV SSB 5 µV max 10db S N N Selectivity 45 MHz 8 kHz BW 455 Khz AM 6 kHz SSB 2 4 kHz Dynamic Range 90 dB at 50 kHz from desired Spurious Responses At 45 MHz 65 dB rejection At 455 MHz 90 dB rejection Intermodulation Third order Intercept 15dbm Frequency Stability 20 Hz per hour 15 C to 50 C AGC Range 1µV to 500 mV 2 dB change Attack time 3 ms Delay s...

Page 5: ...ession terminals Audio Outputs External speaker 1 4 jack selected balanced output Headphone 1 4 jack Internal Speaker is disconnected when headphones or external speaker are plugged in Recorder output line audio Mute audio for use with a transmitter Power Supply External 12 DC supply internal 10 cell battery pack for portable use lamps in off mode 2 1mm ID 5 5mm OD center positive DC Input Jack Ge...

Page 6: ...s the num ber of the active memory channel then pressing the Tuning Knob 1 10 2 3 4 5 6 7 9 8 23 Antennas continued 1 800 773 7931 WWW PALSTAR COM building it may be too shielded for an indoor antenna to work well Performance of the antenna will be improved by providing an earth connection to a ground stake For best results get a good quality ground stake approved for grounding an electrical servi...

Page 7: ...ted hookup wire If you don t have a metal roof effective wire antennas can also be strung in attics You may desire the improved performance that an outdoor an tenna provides or if you live in a steel reinforced or metal sided Front Panel Functions 7 1 800 773 7931 WWW PALSTAR COM toward the front panel until it clicks will cause the stored frequen cies to be displayed instead of the channel number...

Page 8: ...west available empty memory channel number and number will be flashing 8 Front Panel Functions 21 Single Sideband SSB Reception 1 800 773 7931 WWW PALSTAR COM ates a signal that is mixed with the received signal with just enough frequency offset to result in the audio tone In the Palstar R30A the BFO is engaged by choosing the Upper Sideband USB or Lower Sideband LSB modes As you tune across a CW ...

Page 9: ...nd of intermittent raspy noise as the dots and dashes go by To convert the CW signal into a pleasant audio tone that is easy to read there is a circuit in the receiver called a Beat Frequency Oscillator BFO The BFO cre 1 800 773 7931 WWW PALSTAR COM d To store the previously tuned station in the default channel number press the MEM button once e To store the previously tuned station in a memory ch...

Page 10: ...s 10100 10150 30 Meters CW Data only 14000 14350 20 Meters 18068 18168 17 Meters 21000 21450 15 Meters 24890 24990 12 Meters Shared with Fixed Service 28000 29700 10 Meters Other Services The Shortwave spectrum is also home to many other radio ser vices including ship to shore transoceanic airlines government military and others Often called Utility Stations or Utes for short their transmission mo...

Page 11: ...mmunications link into or out of a disaster area for many days after the occurrence In fact the ability of Hams to provide emergency communications is one of the primary reasons Ham radio exists The primary modes heard on the Ham bands are CW Morse Code usually down at the lower end of each band and voice communications in the form of Single Sideband SSB there will be more about SSB later on There...

Page 12: ...ng high currents such as the battery of a car or boat you must protect the radio by placing an in line fuse holder in the power cable and use a fast blow fuse rated no more than 1 Amp What Can I Hear 17 1 800 773 7931 WWW PALSTAR COM What I can hear on my Palstar R30A Receiver Long Wave LW 100 kHz to 300 kHz The most common inhabi tants of this range of frequencies are navigation aids known as non...

Page 13: ... radio propagation can be summarized in a few statements 1 The higher frequencies are better during daytime and in the summer months 2 The lower frequencies are better during night time and in the winter months 3 Periods of high sunspot activity favor the higher frequencies periods of low sunspot activity favor the lower frequencies 4 Solar flares and other disturbances on the Sun can cause geo ma...

Page 14: ...xplanation of wavelength you can now understand what is meant when someone talks about say the 80 meter band or the 49 meter band This is just another way to refer to a group of frequencies that have been set aside for a specific purpose For Electromagnetic Spectrum Propagation 15 1 800 773 7931 WWW PALSTAR COM example the 80 meter band is an amateur radio ham band that runs from 3 5 MHz to 4 0 MH...

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