Balanced zen line stage

hcbonfim · 31st May 2007, 12:53 AM

Hi dear, i am finishing my BZLS and i need some help. I am using
2 psus. The psus heatsinks get too hot, do i need to increase
the heatsinks even using 2 psus, one for each chanel ?

Link
http://diyaudio.fotos.net.br/
sonny246

Best regards

hcbonfim

Babowana · 31st May 2007, 01:52 AM

Are you using IRF610?

Its max junction temperature rating is about 150 deg C. So, in my case, I use them with max in-service heat sink temperature at about 70 deg C which might mean the junction temperature at about 75 deg C. Assuming my temperatures are acceptable, if I compare my sink sizes to yours, mine have wider surface areas.

For you to get better replies, I think you need to measure your sink temperature and post it.

Jaac · 31st May 2007, 06:23 AM

No photo's in the album

Babowana · 31st May 2007, 06:45 AM

Quote:

Originally posted by Jaac

No photo's in the album

You should enter the password, "sonny246".

hcbonfim · 31st May 2007, 08:23 AM

Yes Babowana I am using IRF610. I don´t have a thermommeter to measure the temperature. This one looks like Nelson uses in his article. For safety i will upgrade the heatsinks, i guess.

thanks for the replies.

hcbonfim · 31st May 2007, 08:32 AM

Nice photos Jaac !!! I am using rubycon za im my aleph 3(not finished yet) also.
How your alephs sound with them. I think you are using Rubycon za also.

hcbonfim

Jaac · 31st May 2007, 10:25 AM

Quote:

Originally posted by hcbonfim
Nice photos Jaac !!! I am using rubycon za im my aleph 3(not finished yet) also.
How your alephs sound with them. I think you are using Rubycon za also.

hcbonfim

thanks ruby's ?? where ?? no in my aleph i use panasonics as main caps and also the low esr caps in the amplifier itself. And for the sound i don't know tonight I go to my friend and I will complete the amps, the settings for the currentsourse where incorrect.

gr Jaac

steenoe · 31st May 2007, 03:55 PM

Quote:

Originally posted by hcbonfim
Hi dear, i am finishing my BZLS and i need some help. I am using
2 psus. The psus heatsinks get too hot, do i need to increase
the heatsinks even using 2 psus, one for each chanel ?

Link
http://diyaudio.fotos.net.br/
sonny246

Best regards

hcbonfim

To get back to the question: How much voltage are you feeding the psu's with? The psu fets often runs quite hot (depending on the excess voltage they have to burn) and your heatsinks seems a little on the small side.

Steen.

hcbonfim · 1st June 2007, 12:39 AM

I am using 2 toroids. Each one has 30-30 volts x 2 secondaries, isotated, like the article i guess. The voltages are close to the article.

coils · 1st June 2007, 01:08 AM

hey hcbofim,

my bzls rails are +/- 50vdc, it has been running for two years now with no problems. I got the psu sinks from digikey, maybe you can stand up your fets like this and use larger sinks.

http://www.passdiy.com/images/zen%20...soz-p11-f4.jpg

coils

31st May 2007, 12:53 AM	#1
hcbonfim diyAudio Member Join Date: Oct 2005	Balanced zen line stage Hi dear, i am finishing my BZLS and i need some help. I am using 2 psus. The psus heatsinks get too hot, do i need to increase the heatsinks even using 2 psus, one for each chanel ? Link http://diyaudio.fotos.net.br/ sonny246 Best regards hcbonfim

31st May 2007, 06:23 AM	#3
Jaac diyAudio Member Join Date: Oct 2002 Location: Steenwijk	No photo's in the album __________________ The right tool for the right job, a very nice Solarboat \|\| Ready for a groupbuy ? CLick

1st June 2007, 12:39 AM	#9
hcbonfim diyAudio Member Join Date: Oct 2005	psu toroids I am using 2 toroids. Each one has 30-30 volts x 2 secondaries, isotated, like the article i guess. The voltages are close to the article.

1st June 2007, 01:08 AM	#10
coils diyAudio Member Join Date: Jan 2004 Location: Los Angeles	hey hcbofim, my bzls rails are +/- 50vdc, it has been running for two years now with no problems. I got the psu sinks from digikey, maybe you can stand up your fets like this and use larger sinks. http://www.passdiy.com/images/zen%20...soz-p11-f4.jpg coils __________________ Coiler

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31st May 2007, 01:52 AM	#2
Babowana Formerly "jh6you". R.I.P. Join Date: Jul 2006	Are you using IRF610? Its max junction temperature rating is about 150 deg C. So, in my case, I use them with max in-service heat sink temperature at about 70 deg C which might mean the junction temperature at about 75 deg C. Assuming my temperatures are acceptable, if I compare my sink sizes to yours, mine have wider surface areas. For you to get better replies, I think you need to measure your sink temperature and post it.

31st May 2007, 08:23 AM	#5
hcbonfim diyAudio Member Join Date: Oct 2005	Yes Babowana I am using IRF610. I don´t have a thermommeter to measure the temperature. This one looks like Nelson uses in his article. For safety i will upgrade the heatsinks, i guess. thanks for the replies.

31st May 2007, 08:32 AM	#6
hcbonfim diyAudio Member Join Date: Oct 2005	Nice photos Jaac !!! I am using rubycon za im my aleph 3(not finished yet) also. How your alephs sound with them. I think you are using Rubycon za also. hcbonfim

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