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  1. NPS Ranger

    Uber Rare Federal Sign And Signal Model CJL PA Speaker Base/Blue/Red Split Dome Beacon Ray Model 17 Combo

    Imagine a mechanical siren on the roof! Back in the day, the "police package" on sedans/wagons included roof reinforcement with an extra layer of metal to support a roof mounted siren &/or beacon.
  2. NPS Ranger

    Whelen Cencom powers one or two speakers from the same terminals. How?

    So if you're driving at a groundspeed of 60 MPH into a 10 MPH headwind, and your 11 ohm speaker is connected to the 200W terminal but oriented off-axis to the vehicle by 45 degrees, the root mean square of the forward sound pressure will vary with the density altitude. The corollary is that...
  3. NPS Ranger

    LR11 as DRL question

    Look for a pair of Maxxima or TruckLite white LED backup lights, there any many different types/shapes, cheap and made for continuous duty.
  4. NPS Ranger

    How does the system works

    I think what you have is a pigtail meant to go through the door or window, and that would plug into something installed inside the car, maybe a socket on the headliner that is wired to 12V. Looks like the kind of plug that is used in lots of low voltage power supplies. Shouldn't be hard to...
  5. NPS Ranger

    2011 Tahoe SSV siren speaker location

    I don't think Ryan has been on here for more than a year. This thread was more than 8 years old.
  6. NPS Ranger

    Need help picking light bar for brush truck

    Even for a vehicle that size, NFPA 1901 is pretty specific, just mounting a lightbar on a headache rack won't meet the specs. At a minimum, you'll also need "one or more lights to each front corner, between 18-48" above ground." Your lightbar will need to meet the specified optical...
  7. NPS Ranger

    I need one

  8. NPS Ranger

    TwinSonic Model 12X

    Also, the 4464's run ridiculously hot. Impressive but not really needed for indoor display. Give your power supply a break and use 4416's.
  9. NPS Ranger

    Vintage NYPD Signal Stat Question

    The definitive picture showing the tilt of the NYPD Beacon Ray:
  10. NPS Ranger

    What was your first?

    I guess my first emergency vehicle was a 60's - 70's Miller-Meteor Cadillac ambulance where I had "volunteered" to be a victim for a local disaster drill. My leg was all moulaged up with a gory penetrating fracture and I kept holding it up to the side window to gross out anyone watching, as we...
  11. NPS Ranger

    Vintage NYPD Signal Stat Question

    Maybe I'm going blind but I can't see the tilt, either with the sealed beams or with the top view bulb holders.
  12. NPS Ranger

    Vintage NYPD Signal Stat Question

    The PA kind of does things their own way, even today. Sometimes it works out great, like their tiny tunnel wreckers. Sometimes it's kind of meh, like here. Maybe they replaced an underhood siren or needed a public address capability, and already had a spotlight in the center roof? Who knows...
  13. NPS Ranger

    Beacon identification and questions

    Because it has 2 sealed beams it's actually a military version of the model 14, the model 100 had an open single reflector similar to a Sentry. Before it was discontinued the model 14 was available in both an aluminum and a polycarbonate base. The 11, 14 and 100 domes are interchangeable.
  14. NPS Ranger

    NYPD Federal Sign and Signal P-660

    Wow, nice find! Another common cause of dents back in the day (and still) was "airmail."
  15. NPS Ranger

    Ecco Model 5175 Beacon

    I assume you really meant to say 5715. This is one of the 2 brightest halogen beacons out there, the other being the Sentry/100 from Federal. Great reflector perfectly designed. You can still find lots of them new or used on Ebay.
  16. NPS Ranger

    Whelen flashing halogen beacon help

    I believe that originally was/is an anticollision light for the top of the vertical fin on a Cessna-size aircraft. For that reason 99% of them were made in red, I think they also made clear. Although they may have also sold them in the automotive catalog at one time, good luck finding an amber...
  17. NPS Ranger

    Whelen flash patterns

    Whelen has redesigned their website, renamed their aviation business, and now all links to their flash pattern generator have disappeared.
  18. NPS Ranger

    Rubberized Feet for FedSig Sentry roof light mounting

    Duct tape, gaffer's tape, electrical tape, all work fine. The electrical tape seems to get more slimy in hot sun, though.
  19. NPS Ranger

    Reflective Vehicle Striping?

    3M 10 year warranty, this is much brighter than engineer grade sheeting which is used on traffic signs, reflects at 800 candela in white. The red and fluorescent yellow colors meet NFPA 1901 for fire apparatus. link: 3M 983 DIAMOND GRADE VEHICLE CONSPICUITY TAPE
  20. NPS Ranger

    Today’s haul!

    Interest rates are low due to the virus, give them a call...
  21. NPS Ranger

    Rotator direction

  22. NPS Ranger

    New Class

    Soon to be followed by the learning module on "Scene traffic management in the autonomous vehicle environment," otherwise known as "LOOK OUT IT'S A TESLA!!!!"
  23. NPS Ranger

    RAL colors
  24. NPS Ranger

    Galls Catalog (1989)

    Yep, I remember those days, before the slick magazine catalog they had a color catalog on plain paper, before that it was a 4 page black & white catalog on plain paper, in the early days they were big into selling used fleet stuff.
  25. NPS Ranger

    Ford's new decontamination procedure

    "Law enforcement will have multiple ways to monitor progress. Hazard lights and taillights will flash in a pre-set pattern to notify when the process has begun, then will change at the end to signal completion." Noticing the OC foam covering the inside of all of your windows might be another clue.
  26. NPS Ranger

    How many flashes per minute does each rotator in a Twin Sonic produce?

    In the original Model 12 TwinSonic each side had a 2 bulb beacon rotating at 40 RPM, thus 80 flashes/minute per side, same as a Model 17. There were also 3 stepper mirrors for each rotator, multiplying each flash by 4. Thus a total of 320 flashes/minute per side or 640 flashes/minute for the...
  27. NPS Ranger

    Yet another what is this?

    That looks like it would go well on the tiller end of a ladder truck, one per side. Painted not brass, flat bracket not curved as you'd expect for cab or fender mounting. Either that, or somewhere on a railroad.
  28. NPS Ranger

    Rant: pilot car companies

    To be fair, this is completely dependent on the state regs. If a state doesn't require it, people won't pay money for it. These are NY regs, note 4 lights required, 1000' visibility 360 degrees: Requirements for Pilot/Escort Vehicle General: 1997 or newer vehicle must have 100”...

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