Planes on PHL Approach transmitting on fire freqs?

Status
Not open for further replies.

bettlewood

Member
Premium Subscriber
Joined
Sep 16, 2011
Messages
7
Location
Horsham, PA
I've been back into scanning for a few months now, and I noticed this oddity today when I turned Close Call on (BC246T).

I live along the PHL flight path in the Camden area and I'm getting close call hits on 166.6875, which looks to be a decommissioned National Incident Radio Support Cache/fire frequency per

National Incident Radio Support Cache - The RadioReference Wiki

Not every plane is transmitting this out, I'd say I'm getting it about 1 out of every 6 planes. All I hear is a repeated "buzz-buzz-buzz-buzz" noise, and it stops when the planes go out of range of my scanner.

Any ideas?
 

bettlewood

Member
Premium Subscriber
Joined
Sep 16, 2011
Messages
7
Location
Horsham, PA
I live on the flight path, buzzing starts, plane passes over seconds later, buzzing stops after engines are out of earshot. Pretty sure it's the plane! :)
 

N2SCV

Member
Premium Subscriber
Joined
Mar 7, 2009
Messages
360
Location
Above ground
Probably an image. Look up the IF frequencies in the manual, deduct the IF (or 2x or 3x the IF) from 166.6875, it will give you the air frequency. If your IF is 21.6 then 166.687-21.6=145.087-21.6=123.487.
So the air freq might be 123.490 or near there.
 
Status
Not open for further replies.
Top