Bearing Distance Heading indicator help ..

[+sophocles]

Hello all, I'm wondering If anyone has any better pics of the counter  mechanism of this gauge (in red circle) .. I'm not quite sure how it would operate.

 

Any help would be greatly appreciated.

[+Erik]

I've seen this gauge on the RIO panel of the F-4 as you indicated it's a bearing distance heading indicator what you have circled is signal strength indication and distance counter. That's my best guess anyway.

[+Erik]

I found this doing a search for the "f4 bearing distance heading indicator"

 

 

 

(BDHI) ID-653/U Aeronautics (Milwaukee, US) used in the F-4J/S. 

Pinouts: A,B = magnetic heading signal
             C,D,E,W,b = GND
             H,F = Lead comp. ADF or NAV comp. single bar pointer relative bearing signal,
             M,N = double bar pointer relative bearing signal.
             P,R = hundreds counter TACAN or "miles to go" signal,
             S,T = tens counter signal,  
             V,U = units counter signal,
             Y = 28 V DC,
             Z,c = shutter counter GND,
             k = 26 V AC phase C. 

Source: http://aviation.watergeek.eu/f4j-panel.html

[+sophocles]

That definitely sounds right Erik, I'll scour for more information from F-4 sources, thanks.

You posted right after my reply .. that's exactly what I was looking for!!