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workbench Q's


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vdubmk4 
Copper - Posts: 175
Copper spacespace
Joined: August 04, 2004
Location: United States
Posted: September 13, 2004 at 3:46 PM / IP Logged  

What do i need to set up a testbench like they have at car audio install bays and the such ? Like a ac to dc converter ? if so what kind or specifications would i need to support a car amps and stuff ?

Fortune: You will continue to take chances, and be glad you did.
Ravendarat 
Platinum - Posts: 2,806
Platinum spacespace
Joined: February 23, 2004
Location: Canada
Posted: September 13, 2004 at 4:04 PM / IP Logged  
If you simply want to do testing I suggest something like  a 50 amp power supply with a permament source unit and a board containing terminals for easy hook up, they should consist of power ground speaker and RCA terminals. Other wise every thing else is just personal preferance. You could also add a volltage and ampreage gauge. Note that the 50 amp supply can be substituted for a smaller one if it is going to be used strictly as a test only station. I have a 50 amp supply but I use my bench for music in the shop and generally have some misc amp and sub hooked up as well. If you wanna go ghetto you can buy a battery charger and hook it up instead of a power supply, it provided the same basic end result, and are generally less expensive. Thats what I woulda done had I not had an Extra power supply hanging around from an old board.
double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
NowYaKnow 
Gold - Posts: 1,217
Gold spacespace
Joined: December 18, 2002
Posted: September 13, 2004 at 4:10 PM / IP Logged  
You basically just need an AC to DC power supply. Anything from 20 - 50 amps should be fine for testing stuff.. Radio shack has a decent selection.
Mike
vdubmk4 
Copper - Posts: 175
Copper spacespace
Joined: August 04, 2004
Location: United States
Posted: September 13, 2004 at 9:14 PM / IP Logged  

Ravendarat, so its cool to just use a battery charger ? even if for extended use (a couple of hours perhaps).

NowYaKnow, thanks for the advice.

Fortune: You will continue to take chances, and be glad you did.
Ravendarat 
Platinum - Posts: 2,806
Platinum spacespace
Joined: February 23, 2004
Location: Canada
Posted: September 14, 2004 at 12:34 AM / IP Logged  
As long as its a battery charger capable of putting out enough voltage on a medium or high setting, you dont wanna run it on the start setting for that long, refer to the manual for the charger.
double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
kgerry 
Platinum - Posts: 3,455
Platinum spaceThis member consistently provides reliable informationspace
Joined: February 07, 2004
Location: Saskatchewan, Canada
Posted: September 14, 2004 at 1:46 PM / IP Logged  
keep in mind it will be unregulated voltage which as a rule is never recommended.... spring the few bucks to buy a proper regulated power supply as was suggested to you......
Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Ravendarat 
Platinum - Posts: 2,806
Platinum spacespace
Joined: February 23, 2004
Location: Canada
Posted: September 14, 2004 at 2:22 PM / IP Logged  
For my own personal knowlege, what kinda affects is having a regulated power supply over an unregulated power supply on a test bench gonna do?
double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
jeffchilcott 
Platinum - Posts: 2,483
Platinum spacespace
Joined: April 11, 2002
Location: United States
Posted: September 14, 2004 at 7:10 PM / IP Logged  
unregulated, voltage spike, and as said before.   Most electronic items run on smoke, when you let it out they quit working
2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
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russ lund 
Copper - Posts: 188
Copper spacespace
Joined: April 07, 2004
Location: United States
Posted: September 21, 2004 at 10:33 AM / IP Logged  
Good one Jeff! I like to tell the customers that if they let out the"Magic Smoke" we have to put it back in before the unit will work.
BigDog
kgerry 
Platinum - Posts: 3,455
Platinum spaceThis member consistently provides reliable informationspace
Joined: February 07, 2004
Location: Saskatchewan, Canada
Posted: September 21, 2004 at 11:39 AM / IP Logged  
as mentioned the possiblity of voltage dropouts or worse, spikes... also, the nasty 60 cycle hum you get from most cheap battery chargers
Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979

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