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Freds Hot
Ok so i Build a Fred brige Rectifier for one channel of my amplifier useing 4 freds and 4 caps that peter daniel gave me.
When powered up it works but starts getting warm on the heat sink and the one channel that it is powering for my small amps HUM.
Any idea's Any one..
Id like to use fred's but if they introduce HUM and lots of un nessasary heat then ill use standard Brige Recifiers
Ok so i Build a Fred brige Rectifier for one channel of my amplifier useing 4 freds and 4 caps that peter daniel gave me.
When powered up it works but starts getting warm on the heat sink and the one channel that it is powering for my small amps HUM.
Any idea's Any one..
Id like to use fred's but if they introduce HUM and lots of un nessasary heat then ill use standard Brige Recifiers
Id like to use fred's but if they introduce HUM and lots of un nessasary heat then ill use standard Brige Recifiers
Absolute nonsense
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what about the humm..
........................humm along......
sorry, can't help it - it's friday...
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Ok here is a picture. the heat sink is 5 " x 5" x ( finns 1.75 " )
and the fred's are B1060's
with snubbers MKT1817's On each fred
My amplifiers are 2 x irfp240's each mono block
15,ooomf in this setup up running one channel alone.
And this heat sinks is warm.
Why. do i need a bigger heat sink than the amplifiers??
and the fred's are B1060's
with snubbers MKT1817's On each fred
My amplifiers are 2 x irfp240's each mono block
15,ooomf in this setup up running one channel alone.
And this heat sinks is warm.
Why. do i need a bigger heat sink than the amplifiers??
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hmmm...try this layout...
And did you know you can get these freds for free at On-Semi?? check out this webby at
www.on-semi.com
And did you know you can get these freds for free at On-Semi?? check out this webby at
www.on-semi.com
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Looking at the pic you posted here http://www.diyaudio.com/forums/showthread.php?postid=265117#post265117
Why the blue and yellow wire from the transformer connect to the caps?
Chris
Oh I see it now, you are using dual secondary to connect to the same bridge? I do not understand this...
Why the blue and yellow wire from the transformer connect to the caps?
Chris
Oh I see it now, you are using dual secondary to connect to the same bridge? I do not understand this...
Teach them the words. Sorry, I couldn't help it.
Nor could i. I find no explanation for the existence of this thread - it's obvious diodes can't generate hum if correctly wired and not blown, whether freds or not.
Still, the abscence of hum may be an even bigger problem if one's to believe Zappa
I whipped off her bloomers'n stiffened my thumb
An' applied rotation on her sugar plum
I poked'n stroked till my wrist got numb
But I still didn't hear no,
Dinah-Moe Humm
Dinah-Moe Humm
Where this Dinah-Moe
Comin' from
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