How hot is your BZLS ?

till · 11th August 2003, 10:50 AM

I have measured 110°C at th regulator heatsinks and 90°C at the gainstage heatsinks. Als resistors and PCB is very hot! It runs for some hours until now without failure....

jh6you · 11th August 2003, 11:21 AM

Your heat sinks look too small.
That's why I use the whole aluminum chassiss as a heat sink for all transistors.
My amp just does warm operation.

grataku · 11th August 2003, 11:42 AM

Quote:

Originally posted by till
I have measured 110°C at th regulator heatsinks and 90°C at the gainstage heatsinks. Als resistors and PCB is very hot! It runs for some hours until now without failure....

That's nothing new.
Read my posts in one of the BLS threads about 1 1/2 years ago

till · 11th August 2003, 12:10 PM

grataku, this one?
http://www.diyaudio.com/forums/showt...1820#post11820

jh6you,
The heatsinks are 13.5K/W types. There is no space for larger ones om the PCB if mounted the way the PCB is made for. They look same size like in the article. My only change is 680R instead of 750R, because 750R i did not find here. This may be responsible for a little more current.

grataku · 11th August 2003, 12:44 PM

There are probably even earlier posts, there I had already replaced heatsinks, I think. Anyway, 680 ohm instead of 750 will heat things up a little more not too much more.
I would start thinking about replacing the heatsinks for something bigger.

The nice thing about this site is that everything has been done and reported, the problem with this site is the search engine, it's very hard to do organize the database. If someone could come up with a way to do it he or she would make big $$$.

till · 11th August 2003, 12:53 PM

you are absolutely right about the search engine. You search - find nothing. Redefine search string - find 3 pages with threads. Look into the thread - thread ist 598 posts long. Look and find nothing. Go to print view, go to show all 598 post of this thread on one page, use your browsers string search, and find something if you are lucky. But you will need a lot of time to do this with all the 3 pages of threads, so you will not find everything ....

UrSv · 11th August 2003, 01:44 PM

Quote:

Originally posted by till
you are absolutely right about the search engine. You search - find nothing. Redefine search string - find 3 pages with threads. Look into the thread - thread ist 598 posts long. Look and find nothing. Go to print view, go to show all 598 post of this thread on one page, use your browsers string search, and find something if you are lucky. But you will need a lot of time to do this with all the 3 pages of threads, so you will not find everything ....

Sorry to continue OT but you can actually display a whole thread in one page? I thought that was removed as the per_page option did not work. And what is "print view"?

Goffe · 11th August 2003, 03:03 PM

This is mine version of BZLS and the aluminium sheet gets warm but not hot!

And u can touch the components for 3 sec or more without Burn u finger down

!

This is my first Tread..hope it works!!!

Bricolo · 11th August 2003, 03:20 PM

print view is the option at the page's bottom: "show printable version"

then, at the top right of the printable version, click on "show all xxx posts in one page"

till · 11th August 2003, 04:59 PM

Hi Goffe,

did you try to attach a picture or link?

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11th August 2003, 11:21 AM	#2
jh6you Account Disabled Join Date: Aug 2002 Location: Near to the Pacific Ocean	Your heat sinks look too small. That's why I use the whole aluminum chassiss as a heat sink for all transistors. My amp just does warm operation.

11th August 2003, 12:10 PM	#4
till Banned Join Date: Apr 2002 Location: Germany, Clausthal	grataku, this one? http://www.diyaudio.com/forums/showt...1820#post11820 jh6you, The heatsinks are 13.5K/W types. There is no space for larger ones om the PCB if mounted the way the PCB is made for. They look same size like in the article. My only change is 680R instead of 750R, because 750R i did not find here. This may be responsible for a little more current.

11th August 2003, 12:44 PM	#5
grataku diyAudio Member Join Date: Dec 2000 Location: -	There are probably even earlier posts, there I had already replaced heatsinks, I think. Anyway, 680 ohm instead of 750 will heat things up a little more not too much more. I would start thinking about replacing the heatsinks for something bigger. The nice thing about this site is that everything has been done and reported, the problem with this site is the search engine, it's very hard to do organize the database. If someone could come up with a way to do it he or she would make big $$$.

11th August 2003, 12:53 PM	#6
till Banned Join Date: Apr 2002 Location: Germany, Clausthal	you are absolutely right about the search engine. You search - find nothing. Redefine search string - find 3 pages with threads. Look into the thread - thread ist 598 posts long. Look and find nothing. Go to print view, go to show all 598 post of this thread on one page, use your browsers string search, and find something if you are lucky. But you will need a lot of time to do this with all the 3 pages of threads, so you will not find everything ....

11th August 2003, 03:20 PM	#9
Bricolo diyAudio Member Join Date: Nov 2002 Location: Grenoble, FR	print view is the option at the page's bottom: "show printable version" then, at the top right of the printable version, click on "show all xxx posts in one page"

11th August 2003, 04:59 PM	#10
till Banned Join Date: Apr 2002 Location: Germany, Clausthal	Hi Goffe, did you try to attach a picture or link?

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