Superior used two holes on their demountable beacons. One for the wire (hot lead) and a smaller, solid, mounting stud (1/4") that you could not pass the wire through. M-M used a hollow stud (1/2") that the wire was passed through. On some coaches the hole for the wire was replaced by a button contact that was flush mounted on the roof and contact was made by a spring contact on the beacon.Michael,
Can you send me a picture of the hole pattern? Most demountable beacon rays had the wire come down through the stud that was threaded for the wing nut. If you miss out on the beacon ray for sale let me know....I have some available I think. Also to add to what John said:
model 17 had two bulbs
173 three bulbs
174 had four bulbs and oscillates 95 degrees
175 has four bulbs one tipped down and one up most famous from NYPD
176 like the 174 has four bulbs and rotates 360 degrees.
Michael,
Can you send me a picture of the hole pattern? Most demountable beacon rays had the wire come down through the stud that was threaded for the wing nut. If you miss out on the beacon ray for sale let me know....I have some available I think. Also to add to what John said:
model 17 had two bulbs
173 three bulbs
174 had four bulbs and oscillates 95 degrees
175 has four bulbs one tipped down and one up most famous from NYPD
176 like the 174 has four bulbs and rotates 360 degrees.
Another thing I learned in regards to 184's is that the factory literature reccomends a 5 inch base for trimming and suggests that the 3 inch is unsuitable. Recently, during a conversation with a member of the forum, it was told to me that a 3 inch base can be used for trimming, this is before I read the literature. Any truth to the statement?