[NJARC] NJARC Digest, Vol 112, Issue 8

[w2wiq1 at juno.com]

HI ALL:

BEING IN THE AIR CORP DURING WWII AS A RADIO MECHANIC I HAD TO SERVICE AIRCRAFT AND GROUND STATION EQUIPMNENT BEACON TRANSMITTERS,TOWER RECEIVERS AND TRANSMITTERS,LONG DISTANCE POINT TO POINT RECEIVERS AND TRANSMITTERS AND RADIO TELETYPE RECEIVERS AND TRANSMITTERS
THE 200-500KHZ WAS FOR THE AIFIELD LANDING BEACONS.ALSO FOR NAVY LOW FREQUENCY COMMUNICATIONS.THERE WERE 4 QUADRANTS 2 "A"& 2 "N"IDENIFIED BY THE MOSE CODE AS A & N.WHEN APPROACHING A FIELD YOU WOULD HEAR IN YOUR HEADSET EITHER A OR N.THIS WOULD GUIDE YOU TO THE FIELD.
WHEN LINED UP TO LAND YOU WOULD HAVE TO LISTEN FOR A STEADY TONE.THIS TOLD YOU YOU WERE LINED UP TO MAKE A PERFECT LANDING ON THE RUNWAY.THIS FEATURE WAS USED WHEN VISIBILITY WAS VERY POOR SO YOU COULD FIND THE AIRPORT AND BE ABLE TO LAND IN POOR VISIBILTY.ALSO IN MORSE CODE THE AIRPOET WAS IDENTIFYED SUCH AS NEWARK EWR.
NEWARK AIRPORT WAS WHERE THE FIRST LANDING BEACON WAS TRIED BY CHARLES LINDBERG.

THE BROADCAST BAND WAS USED FOR USE WITH A DIRECTION FINDER USEING BROADCAST STATIONS.SHIPS AND BOATS ALSO USED THE BROADCAST BAND FOR DIRECTION FINDING/

THE 120MHZ FREQUENCYS WERE USED FOR TOWER AND COMMUNICATION WITH OTHER AIRCRAFT.THESE FREQUENCYS USED LOW POWER TRANSMITTER AND WERE DESIGNED FOR CLOSE OR SHORT RANGE COMMUNICATIONS.

WALTER-W2WIQ

---------- Original Message ----------
From: rckchp at comcast.net
To: njarc at mailman.qth.net
Subject: Re: [NJARC] NJARC Digest, Vol 112, Issue 8
Date: Sun, 18 Aug 2013 18:55:46 +0000 (UTC)

Just remember
Reply = Poster
Reply All = Everyone

_________________________________________________________


Pete, 



120mhz is in the airband freqs. ( http://en.wikipedia.org/wiki/Airband  ) In 50s the am broadcast band and the LF 200-500khz band were used as "homing beacons", an earlier type of direction finding. When installed in an aircraft your radio probably was connected to a instrument panel mounted round gauge which would indicate the heading (in compass degrees) to the ground transmitting station. The LF beacons transmitted an audio cw identifier, such as EWR for Newark airport.....which is why the commercial pilot test included knowledge of international code in those days....maybe still does. 



Rich  K2CPE 



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Subject: NJARC Digest, Vol 112, Issue 8 

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Today's Topics: 

   1. Early aircraft radio (Pete Malvasi) 


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Message: 1 
Date: Sun, 18 Aug 2013 11:01:06 -0400 
From: Pete Malvasi <pmalvasi at aol.com> 
To: NJ ARC Mail list <njarc at mailman.qth.net> 
Subject: [NJARC] Early aircraft radio 
Message-ID: <95D76B55-815B-425A-8946-66D9D011BD3B at aol.com> 
Content-Type: text/plain;Â Â Â Â Â Â Â Â charset=us-ascii 

I recently bought a bendix airplane transmitter ca 1950 and noticed its both a transmitter and receiver. It transmits on the 120mhz am band but receives both BC band and 200-500khz. 

Does anyone know about this - the dual band t and r aspect of aircraft radio then? This is new to me. 

73 Pete W2PM 

Sent from my iPhone 

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End of NJARC Digest, Vol 112, Issue 8 
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