? about using a scope

[nauc 10+ year member]

im getting this http://www.amazon.com/gp/product/B0007ZPNH8/ref=sr_11_1/104-0840591-1917566?%5Fencoding=UTF8&v=glance&n=228013

will i get different results if i unplug the speaker while finding the clipping point vs leaving the speaker hooked up

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[Ali G 10+ year member]

Yes, not all the power would go through Oscilliscope and all readings will just be based on partial power.

 

[DBfan187 5,000+ posts]

I have that scope.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

When setting your gains with it, leave all speakers unhooked.

 

[nauc 10+ year member]

I have that scope.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

When setting your gains with it, leave all speakers unhooked.

how do you like the hps10

 

[germanyt 10+ year member]

http://www.tek.com/site/ps/0,,55-14869-INTRO_EN,00.html

we use these on my ship. i dont recommend you get one cuz they are like 15000 dollars but its a nice idea. i wonder what someone would say if i borrowed it for my stereo. i have my own but its nowhere near as nice.

http://us.fluke.com/usen/products/Fluke+190.htm?catalog_name=FlukeUnitedStates

this is one that I bought from teh ship when we got the new tektronix ones. works good. im just not a fan of digital o scopes. id like to find an oldschool analog tektronix

 

[DBfan187 5,000+ posts]

how do you like the hps10

love it. I love crt scopes too, but you can't take and use them everywhere:up2somet:

 

[jrz126 10+ year member]

http://us.fluke.com/usen/products/Fluke+190.htm?catalog_name=FlukeUnitedStates

this is one that I bought from teh ship when we got the new tektronix ones. works good. im just not a fan of digital o scopes. id like to find an oldschool analog tektronix

I have a tek-2430A, I like the digital since it will give me a digital measurment out instead of having to cound the blocks and whatnot.

I also got mine through work. (paid a whole $0.25/lb for 3 of em).

That 190 looks pretty sweet. I've got an old analog scope sittin' in my closet if you wanna trade? //content.invisioncic.com/y282845/emoticons/naughty.gif.94359f346c0f1259df8038d60b41863e.gif

Dont you need to put a load on the amp to get it to clip? I know it would clip eventually, but I would think you'd need to get a load on it to get a good indication of when clipping occurs.

 

[DBfan187 5,000+ posts]

no. It will clip just like you think it would. This way the amp never clips becaue if you set it with a speaker attached(reactive) the amp will actually send out more power.(clipping)

 

[thch 10+ year member]

while most of this makes no sense (the oscope should have a very high input impedance and not really draw any power at all).

i did a proof of concept test on my (hopefully) upcoming gain setting tool. i am very suprised at just how well it did despite being so simple (i tested the simplist version i could think of). and there are many improvements that could increase resolution and fix some of the nuances that currently exist. in anycase, in the POC test, it came out to work about as well as an OSCOPE. obviously since i tested it with an scope, well, it couldn't have been better then the scope.

loading the amp can do interesting things. the most accurate testing would be from an amp with the speaker as a load. an internal sensor would be preferable.

 

[jrz126 10+ year member]

while most of this makes no sense (the oscope should have a very high input impedance and not really draw any power at all).

Exactly. and once you get alot of current flowing through there it'll change quite a bit.

I picked up some power resistors from work (found in a scrap pan //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif ) Which I used to determine the real power output of my amp.

 

[DBfan187 5,000+ posts]

eh, I was just stating what RC and Dave Navone have said.