an EE told me something about the UcD400 module

onixuser · 23rd March 2005, 09:55 PM

i'm doing my internship in a big gov't agency, in my department we fix/design/troubleshoot electronics equipment used in the field for radio communications and different types of machines used by the public.

i brought the module at work and showed it to my EE manager, he laughed at me and said it's impossible for the device to produce 400W RMS

he looked at the 2 components connected to the heatsink and checked the datasheet online(fairchild?) and told me maybe it's 400W peak NOT RMS, the 1 page manual that came with the module doesn't state if it's Peak or RMS. I printed the manual of the Zappulse cause it's has more information about Class D amp (hopefully Hypex can produce a manual that contains much information like the one for Zappulse) just to show him that an amplifier that small can produce that much power.

now this just became more exciting, i want to prove him wrong, i'll prove to him that it is really 400W RMS

, once i finish the amp we will hook it up to an analyzer at work so I can prove it using his own equipments

onixuser

Stocker · 23rd March 2005, 09:59 PM

Just be prepared to get laughed at again without getting your feelings hurt ok?

ghemink · 23rd March 2005, 11:31 PM

Quote:

Originally posted by onixuser
i'm doing my internship in a big gov't agency, in my department we fix/design/troubleshoot electronics equipment used in the field for radio communications and different types of machines used by the public.

i brought the module at work and showed it to my EE manager, he laughed at me and said it's impossible for the device to produce 400W RMS he looked at the 2 components connected to the heatsink and checked the datasheet online(fairchild?) and told me maybe it's 400W peak NOT RMS, the 1 page manual that came with the module doesn't state if it's Peak or RMS. I printed the manual of the Zappulse cause it's has more information about Class D amp (hopefully Hypex can produce a manual that contains much information like the one for Zappulse) just to show him that an amplifier that small can produce that much power.

now this just became more exciting, i want to prove him wrong, i'll prove to him that it is really 400W RMS , once i finish the amp we will hook it up to an analyzer at work so I can prove it using his own equipments

onixuser

Just don`t laugh to hard when it really gives 400Watt :-). You could push your luck a bit by using a 3 Ohm load and cranck out even more than that.

Gertjan

classd4sure · 24th March 2005, 01:14 AM

Hi,

....and he got all that from the data sheet of the output device did he? Impressive...manager you said??

He sounds like just the type to put some of those big gov. manager bucks where his yap is, how much do you have riding on this?

I bet he can make a better one too

classd4sure · 24th March 2005, 01:51 AM

Incidentally, did you tell your manager it _does_ require some extra heatsinking? The plain module on its own will produce the rated power but is likely to fry. I kind of get the feeling he wasn't thinking that far into it though.

DSP_Geek · 24th March 2005, 01:53 AM

I'd bet he's assuming the amp runs Class-AB and figuring the plausible power output from there. As classd4sure says, you could make some coin from his misapprehension - just make sure the power supply is well regulated.

Francois.

phase_accurate · 24th March 2005, 06:11 AM

I dare to bet that he doesn't even know what a class-d amp is !!

Regards

Charles

km · 24th March 2005, 07:35 AM

hi.

>I printed the manual of the Zappulse cause it's has more information about Class D amp (hopefully Hypex can produce a manual that contains much information like the one for Zappulse) just to show him that an amplifier that small can produce that much power.>

proof?

did you test it?

best rgds - karsten madsen - cadaudio.dk

richie00boy · 24th March 2005, 08:23 AM

Better tell your manager to take a knife and fork in to work next time as he will be eating humble pie

All you need is a 42-0-42 transformer and a pair of 15,000uF caps and you will make approx 400W RMS into 4 ohms all day long. Of course you will need a smallish (the sort of size you would use for a 40W or so amp) heatsink, but that shouldn't be a problem.

He has obviously just looked at the power rating of the output devices and is assuming class-b principles. Typical public sector manager/dinosaur engineer thinks he knows it all because he has been doing the same old narrow minded thing for the last 20 years.

Yves Smolders · 24th March 2005, 01:41 PM

You should put him in his place!

This is the mentality I'm meeting at my local hifi stores as well... show them pics and they laugh, no way, no way...

Some people are rusted(sp?) in principles

Y

23rd March 2005, 09:55 PM	#1
onixuser diyAudio Member Join Date: Feb 2005 Location: NYC	an EE told me something about the UcD400 module i'm doing my internship in a big gov't agency, in my department we fix/design/troubleshoot electronics equipment used in the field for radio communications and different types of machines used by the public. i brought the module at work and showed it to my EE manager, he laughed at me and said it's impossible for the device to produce 400W RMS he looked at the 2 components connected to the heatsink and checked the datasheet online(fairchild?) and told me maybe it's 400W peak NOT RMS, the 1 page manual that came with the module doesn't state if it's Peak or RMS. I printed the manual of the Zappulse cause it's has more information about Class D amp (hopefully Hypex can produce a manual that contains much information like the one for Zappulse) just to show him that an amplifier that small can produce that much power. now this just became more exciting, i want to prove him wrong, i'll prove to him that it is really 400W RMS , once i finish the amp we will hook it up to an analyzer at work so I can prove it using his own equipments onixuser

23rd March 2005, 09:59 PM	#2
Stocker diyAudio Member Join Date: Dec 2003 Location: Austin	Just be prepared to get laughed at again without getting your feelings hurt ok? __________________ Jesus loves you.

24th March 2005, 08:23 AM	#9
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Better tell your manager to take a knife and fork in to work next time as he will be eating humble pie All you need is a 42-0-42 transformer and a pair of 15,000uF caps and you will make approx 400W RMS into 4 ohms all day long. Of course you will need a smallish (the sort of size you would use for a 40W or so amp) heatsink, but that shouldn't be a problem. He has obviously just looked at the power rating of the output devices and is assuming class-b principles. Typical public sector manager/dinosaur engineer thinks he knows it all because he has been doing the same old narrow minded thing for the last 20 years. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
How to do a volume control for UCD400 Module?	CptanPanic	Class D	1	6th July 2009 07:15 PM
The story of my life: diy speakers (as told by an EE)	JLC7	Multi-Way	40	26th August 2008 06:02 PM
The old man told me to get it all out of the basement	dp63130	Tubes / Valves	32	27th March 2008 07:53 AM
Adding third UCD400 module...	Regnad	Class D	0	29th May 2006 03:48 PM


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

24th March 2005, 01:14 AM	#4
classd4sure Account Disabled Join Date: Feb 2004	Hi, ....and he got all that from the data sheet of the output device did he? Impressive...manager you said?? He sounds like just the type to put some of those big gov. manager bucks where his yap is, how much do you have riding on this? I bet he can make a better one too

24th March 2005, 01:51 AM	#5
classd4sure Account Disabled Join Date: Feb 2004	Incidentally, did you tell your manager it _does_ require some extra heatsinking? The plain module on its own will produce the rated power but is likely to fry. I kind of get the feeling he wasn't thinking that far into it though.

24th March 2005, 01:53 AM	#6
DSP_Geek diyAudio Member Join Date: Aug 2003 Location: Santa Cruz, California	I'd bet he's assuming the amp runs Class-AB and figuring the plausible power output from there. As classd4sure says, you could make some coin from his misapprehension - just make sure the power supply is well regulated. Francois.

24th March 2005, 06:11 AM	#7
phase_accurate diyAudio Member Join Date: May 2002 Location: Switzerland	I dare to bet that he doesn't even know what a class-d amp is !! Regards Charles

24th March 2005, 07:35 AM	#8
km diyAudio Member Join Date: May 2001 Location: dk	hi. >I printed the manual of the Zappulse cause it's has more information about Class D amp (hopefully Hypex can produce a manual that contains much information like the one for Zappulse) just to show him that an amplifier that small can produce that much power.> proof? did you test it? best rgds - karsten madsen - cadaudio.dk

24th March 2005, 01:41 PM	#10
Yves Smolders diyAudio Member Join Date: Feb 2005 Location: Antwerp	You should put him in his place! This is the mentality I'm meeting at my local hifi stores as well... show them pics and they laugh, no way, no way... Some people are rusted(sp?) in principles Y

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read