[ARC5] F-86 Radios

[jmfranke]

Interrogate is on 1030 MHz and reply is on 1090 MHz.

John  WA4WDL

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From: "D. Platt" <jeepp at comcast.net>
Sent: Sunday, December 23, 2012 7:25 AM
Cc: <arc5 at mailman.qth.net>
Subject: Re: [ARC5] F-86 Radios

> You guys have good memories.  The two frequencies stated are, of course, 
> correct, as is the nomenclature data.  At risk of dragging this thread out 
> to breaking point, I'll just add that the current system for MIL is pretty 
> much the same, with Mode 2/B being the mil only discreet codes for air 
> defense uses.  The Civil Mode A (mode 1)  and C (mode 3) are used, with 
> mode C including your altitude info (via an encoder).  That said, the 
> NextGen is called ADS.  ADS-B is an aircraft and satellite-based 
> transmission system. ADS-B can be broken into two primary functions, ADS-B 
> Out and ADS-B In. An aircraft equipped with ADS-B Out works by sending 
> GPS-derived position and velocity data from the aircraft systems, through 
> an ADS-B-modified Mode S Transponder or a Universal Access Transceiver 
> (UAT) _to other aircraft_, ground vehicles and ground stations for the 
> purpose of Air Traffic Control and coordination.  This system is now 
> mandatory by 2020.  Companies like Garmin and others are now selling gear 
> for general aviation.  We have not bought anything, yet, but the tide is 
> coming in. Sooo, that's the deal.
>
> Jeep K3HVG
>
> On 12/22/2012 10:01 PM, Sandy wrote:
>> They were relatively primative technology actually. Straightforward 6AK5 
>> IF string, 1N25 crystal mixer and lighthouse tubes for local 
>> oscillatorand transmitter oscillator.  Frequency determined by a high Q 
>> cavity. Frequencies were 1030 and 1090 hz. receiver and transmitter 
>> respectively or the reverse order.  It's been MANY years so I forget!  If 
>> you had a pocket general coverage receiver (Like ICOM R1) you could hear 
>> the aircraft's signals easily when they were swept by the radar.  There 
>> was PLENTY of "replies" when the airliners are waiting to taxi and moving 
>> around the airport.  I have no earthly idea what they are using now.  At 
>> one time one of the commercial modes sent a coded altitude reply. FAA was 
>> supposed to be playing with a radar display in "3D" mode using a rotating 
>> flat circular screen PPI indicator!  The pivots being at the "north and 
>> "South" pole ends of the screen.  The aircraft blips were "suspended" in 
>> "mid air" to the eye and vertical displacement represented relative 
>> altitude.  Very experimental. Never heard any more about it after that. 
>> It sounded interesting but kinda a bulky "Globe" for the glass envelope!
>>
>> Anybody hear of such a device in plans or actual fact?
>>
>> Sandy W5TVW
>
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