Old NYPD electronic sirens

CHIEFOPS

Member
Jan 24, 2011
1,532
NYC
The NYPD pa300 was custom made for nypd . The model is PA300-MSB. Aside of the different manual wail, it had momentary Yelp on the horn ring wire and a plug in mic
IIRC in Standby the horn ring and manual paddle switch was instant Peak & Hold, in Wail and Hi-Lo it was momentary Yelp instead of Tap II
 

MtnMan

Member
Dec 20, 2012
1,533
Eastern PA
The pinout for the 12 pin connector is:

<td>Pintd><td>Colortd><td>Functiontd><td>1td><td>Redtd><td>BAT +td><td>2td><td>Blacktd><td>GND -td><td>3td><td>Whitetd><td>SPKRtd><td>4td><td>Whitetd><td>SPKRtd><td>5td><td>Yellowtd><td>MAN YELP -td><td>6td><td>Bluetd><td>HORNtd><td>7td><td>Graytd><td>HORN RINGtd><td>8td><td>Yel/Blktd><td>RADIOtd><td>9td><td>Yel/Blktd><td>RADIOtd><td>10td><td>Orangetd><td>IGN +td>
 
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MtnMan

Member
Dec 20, 2012
1,533
Eastern PA
Here’s where the magic happens:

2900d8bc-720f-4fd8-86ef-ebe7295f68a3-jpeg.226342
 

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kneedrachen

New Member
Oct 5, 2022
9
NJ
If someone could please send me a Mark VII manual and....explain what the mod is to make the momentary yelp "nypd spec" as a momentary vs a 2 second burst. Please?
 

RevSal

New Member
May 12, 2023
1
Huntington
Scientifc prototypes in ny.They are out of busness since the early90s.


they are worth about 150 a piece maybe.


NYC EMS used them thats why they dont have the nypd logo. back in the 80s


Also FD used them intheir chiefs cars. then too


they made that one also with a airhorn and phaser too which was rare.


The red pushbutton was purchased from radio shak by SP


They are still used to on some nyc ambulances that work for specific hospitals.
so if I needed to replace the red push button where could I get one?
 

Zkinstalls

New Member
Sep 4, 2022
2
New York
I know this conversation is old but I have some info. I have the manual for these units, and aside from the markings they are identical. One of the joys of that unit was except for the newer models being able to vary the tones, they never changed. Scientific Prototype used to make these for Signal Stat and then under their own name (SP). The company that made them is now called Itech and they are, as of a year or two ago, located at 557 So. Fulton Ave. Mount Vernon NY. They no longer make the siren, but as of about two years ago, if you bring it to them they will try to repair it.


If anyone needs the manual let me know and I will e-mail it to you.
I know this post is more then 10 years but is it still possible to get the manual
 

JohnMarcson

Administrator
May 7, 2010
10,971
Northwest Ohio
Not the manual, but the pinout is listed

This is for the Mark VII


Pin 1 - Red Battery +


Pin 2 - Black Battery -


Pin 3 - White Single Speaker


Pin 4 - White Single Speaker


Pin 5 - Yellow Remote Switch For Yelp


Pin 6 - Blue Horn Relay


Pin 7 - Gray Horn Ring


Pin 8 - Green - Radio Re-Broadcast


Pin 9 - Green - Radio Re-Broadcast


Pin 10 - Orange - Aux B+ Ignition

Not sure if you are a member (or if the post above is from this group) but there is a Scientific Prototypes facebook group...

Here is a manual from this thread if it wouldn't load properly previously, it does now...

 

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