[ARC5] F-86 Radios

[D. Platt]

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