|
|
Joined: Apr 2009
Posts: 440
Member
|
OP
Member
Joined: Apr 2009
Posts: 440 |
Is there a simple tester to test paging horns, and amps ?
Thanks Gary S.
Gary Stevens
|
|
|
Visit Atcom to get started with your new business VoIP phone system ASAP
Turn up is quick, painless, and can often be done same day.
Let us show you how to do VoIP right, resulting in crystal clear call quality and easy-to-use features that make everyone happy!
Proudly serving Canada from coast to coast.
|
|
|
|
Joined: Dec 2005
Posts: 7,056
RIP Moderator-Mitel, Panasonic
|
|
RIP Moderator-Mitel, Panasonic
Joined: Dec 2005
Posts: 7,056 |
standard 77 toner will drive an amp, or a single speaker. Try it out on an operational amp, and on an individual speaker that is not connected to anything so you know what to expect.
There is also a meter for testing the power requirement for a run of line operated speakers, and of course I've forgotten what it's called, but they cost $200 and up. Quite useful for finding the 8 ohm speaker that 'Joe' the maintenance guy hooked into the system! Suddenly that run requires WWWAAAYYY too much power!
When I was young, I was Liberal. As I aged and wised up, I became Conservative. Now that I'm old, I have settled on Curmudgeon.
|
|
|
|
|
Joined: Sep 2005
Posts: 9,285 Likes: 6
Admin
|
|
Admin
Joined: Sep 2005
Posts: 9,285 Likes: 6 |
Impedance Meter = Rather then the DC resistance they use a 1K tone to read the impedance which will give you the wattage requirement for the speaker load.
The quick test for an 25/70v amp is apply tone to input and voltmeter on output. At full power you should have 25/70 volt out. When a load that does not exceed amp wattage is connected the output should stay close to unloaded voltage. A incandescent light bulb makes a good load just use ohms law to figure the wattage.
Example a 120v/150w bulb is about a 50 watt load @ 70v
|
|
|
|
|
Joined: Dec 2002
Posts: 9,423 Likes: 1
Member
|
|
Member
Joined: Dec 2002
Posts: 9,423 Likes: 1 |
Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
|
|
|
|
|
Joined: Jan 2010
Posts: 206
Member
|
|
Member
Joined: Jan 2010
Posts: 206 |
Can't live without it...https://toaelectronics.com/zm-104a.asp
|
|
|
|
|
Joined: Dec 2005
Posts: 7,056
RIP Moderator-Mitel, Panasonic
|
|
RIP Moderator-Mitel, Panasonic
Joined: Dec 2005
Posts: 7,056 |
"but they cost $200 and up."
--------------------------------------------------------------------------------------------------------
Yeah, yeah. I know. My excuse is the last one I bought was 20 years ago! Last places I worked wanted to keep the billing up, at least that's the way it seemed. Finding a bad/wrong type speaker can take 2-5 times as long without that impedance meter!
When I was young, I was Liberal. As I aged and wised up, I became Conservative. Now that I'm old, I have settled on Curmudgeon.
|
|
|
|
Forums84
Topics94,279
Posts638,738
Members49,764
| |
Most Online5,661
May 23rd, 2018
|
|
|
0 members (),
119
guests, and
74
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
|
