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  1. S

    SS200SM Configurator

    The way I understand it, a doubling in loudness requires a 10 decibel increase. Adding a second speaker, thereby doubling the power from 100 watts to 200 watts, represents only a 3 decibel difference. Adding 3 speakers, for a total of 400 watts, would double the power twice, representing a 6...
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    SS200SM Configurator

    You could be experiencing destructive interference if the speakers are wired out of phase relative to one another. To test this, disconnect one speaker's wires from the siren and reconnect its wires to the siren in the opposite way. Leave the other speaker's wires as they are.
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    Help identify federal sig beacon

    That's a Federal model 17.
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    Whelen Vertex Duo

    Here's one that's even older. Its copyright date is from 2010 and was last updated on March 4, 2015: https://www.whelen.com/wp-content/uploads/2020/08/14381.pdf
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    Whelen Vertex Duo

    Check out that copyright date! ©2016 Whelen Engineering Company Inc.
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    Wanted Whelan lightbar strapping kit, 2013 ford f-150

    The title of the thread, although it doesn't seem to appear when viewing the thread, says the application is a 2013 F150. I believe this application calls for a STPKT61L or STPKT61 depending on the length of the bar selected.
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    Whelen Catalogs, 1976-1999

    A few years back, I made what I believe to be a complete backup of John's entire photobucket. If you can provide a list of broken photobucket URLs, I'll see if I have what you're looking for.
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    Whelen LED low power mode

    The voltage at the diodes remains the same when in low-power mode as when in full-power mode. Pulse-width modulation (PWM) occurs at one rate for full-power mode and at a different rate for low-power mode. Whelen holds patent US6586890B2 that may be a good place to begin your research. If your...
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    liberty question

    Your best bet may be to use the outputs for the alleys or takedowns for the additional lightheads, then use the flashing alleys and takedowns function to flash those additional lightheads.
  10. S

    Wanted Unity RV-26 Bulb retaining clip

    I think an RV-25 is the Unity beacon with two PAR36 lamps, while an RV-26 is the Unity beacon with two PAR46 lamps. I'm not sure, however, if this makes any difference to the part you're seeking.
  11. S

    For Sale Hotfeet.....umm feet

    No problem, I'll keep looking. Good luck selling!
  12. S

    For Sale Hotfeet.....umm feet

    By any chance, do you happen to have the LED lightheads that would serve as takedowns and/or alleys on these?
  13. S

    Galls Traffic Backer - Not for Ford Use?

    Installing a diode should almost certainly be sufficient to prevent that problem.
  14. S

    antiquewarninglights.com

    There is "Bill" on OfferUp in Oak Forest, IL who I suspect may be the same person.
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    Worth it?

    If you look closely, you'll see that it's actually a Pierce Alert.
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    Stop/tail/turn on a Whelen edge

    Whelen makes stop/tail/turn lamps that fit their twist-lock sockets. If you have twist-lock reflectors in your bar already, you're in good shape. Use a four-conductor wire. Use one wire each for left stop/turn, right stop/turn, tail, and ground. Whelen also makes 400-series stop/tail/turn...
  17. S

    Edge 9M 48" on SuperDuty roof?

    Would you mind measuring your straps when they arrive and let me know if they're actually 11" long, please?
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    Edge 9M 48" on SuperDuty roof?

    A 48" bar is too narrow compared to the width of the cab roof, especially if you intend to install it using straps that hook onto the rain gutters. If you try install a 48" bar, you will find yourself unable to set the feet wide enough so they land on the curved portion of the roof. A 55" bar...
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    Wanted CJ-184 Motor Mount

    Would you consider trading your round motor for one with flat sides?
  20. S

    Mr11 led swap?

    You will be much, much happier with a set of Whelen LR11s. They are available from members here for less than you'd think.
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    Today’s haul!

    There's an entire thread on these trucks, here: https://www.bigmacktrucks.com/topic/15357-any-info-on-mr-mf-tunnel-wrecker/
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    Whelen 500 seris frames

    The housing from a Whelen Raider may work for you.
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    Install guide for Whelen Edge 9000 w/ duplex rear?

    The model numbers for the duplex Edge have a 6 in the second position. For instance, model the 9622.
  24. S

    100w vs 200w siren

    @NPS Ranger explained the math, and a little of the physics, of 200 watts versus 100 watts in a thread about overdriving your siren some years back:
  25. S

    RX2700 different modules

    I believe the top photo shows a PRIZM module, while the bottom photo shows a PRIZM II module.
  26. S

    Unitrol Touchmaster Delta not sweeping

    Sweep is accomplished by selecting SWP (sweep) instead of O/R (override) and them momentarily completing a circuit between the RNG (horn ring) terminal and either +12v DC or ground. Here are the relevant excerpts from the manual:
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    FS Signalmaster Wiring Help

    There is a big thread on just this topic, here: https://elightbars.org/forums/threads/traffic-advisor-arrow-signal-master-etc-info-thread.32740/
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    Configuring a Code 3 Switch Box with an MX-7000

    I have seen a five-switch Galls switch box with red switches. Here is one in the same housing as the switch box in my memory, but with slightly different wording at the top. Photo Credit: eBay
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    What head/tail light flasher works on my vehicle

    Many of the Sound Off flasher compatibility reference files, quite fortunately, live on courtesy of archive.org. For instance, here's one I recently dug up for model year 2002 applications...
  30. S

    Wanted Whelen TIR3 surface mount flange

    When first introduced, TIR3s came with black plastic flanges half as deep as the lighthead. The full-depth flanges came a few years later, as I recall. Some other mounting options that exist include rubbet grommets, short grey plastic flanges which came with Galls TIR3s, cast aluminum flanges...

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