Amp mosfit question
Originally Posted by robmar
and how many amps do you service?
not many from the looks of it
transistors can be chap or very exspensive
had a sony amp in price on the transistors was over $ 50 each
and there were 8 per half channel
do the math there mr transistors are cheap
p.s. sony uses obsolite parts so they buy up old stock for a deal
then when you need to get it serviced the only source for parts is from them
unless you willing to pay for a production run from the manufacturer
not many from the looks of it
transistors can be chap or very exspensive
had a sony amp in price on the transistors was over $ 50 each
and there were 8 per half channel
do the math there mr transistors are cheap
p.s. sony uses obsolite parts so they buy up old stock for a deal
then when you need to get it serviced the only source for parts is from them
unless you willing to pay for a production run from the manufacturer
IRFP064N aprox $5/ea ( but you need to buy a rail of 25) so $125 + labour
IRF9640 aprox $3.5/ea ( but need to buy rail of 50) so $175 + labour
IRF640 aprox $3.5/ea ( yes same ... rail of $50)
This is nonsense E-Sonic is quoting $1.50 each qty 1
http://www.e-sonic.com/acc/products.aspx?command=detail&partID=IRF9640&partID Ext=212
I have purchased from them to fix amps several times.
and there may be other substitues if you cannot get the exact part. This is an audio amp, not the space shuttle.
How do you know that sony uses obsolete parts? If I was making a few in my garage mayb... but dont think major manufacturers use obsolete parts this is just bad risky business. They always make sure there are alternate supliers.
What I am trying to get at is that if couple of transistors are blown on a channel, sure go ahead and fix it. But if almost every transistor is fried, who knows what else is blown.. It becomes very risky to fix it.
you forgot to read the rest of the information on that page...
it says:
"Ordering Information
Price per 1 EACH:1.511
Standard Package Qty:50
Minimum Order Qty:400
Quantity Available:0
Lead Time (days):73
"
meaning they have 0 in stock and need 73 days to get them... and you must order 400 minimum!
meaning it will cost you $604.04 and will take 2.5 months to get them
which will you chose?
Last edited by MTA; Sep 29, 2006 at 11:32 AM.
^ mouser has the same IRF9640 fets in stock for just a little more then $1.50 and there is no minimum... digikey has IRFP064N-pbs which is higher power and there is no minimum...
ordering from more then one place is a pain and you pay more for shipping, but I also thought your example was bad... no need to buy 400 or even 50 if you look around....
ordering from more then one place is a pain and you pay more for shipping, but I also thought your example was bad... no need to buy 400 or even 50 if you look around....
Last edited by Haunz; Sep 29, 2006 at 11:39 AM.
replacing transistors is easy, buy them and do it yourself provided those specific mosfets arent expensive, i have seen them at 70 bucks each before for some really high current ones. www.digikey.com or www.sayal.com. before replacing them you might want to find the root cause of them blowing or you will replace them, power it on and they blow again unless it blew cause you did something dumb so you already know why?
Originally Posted by MTA
I also would not recommend handling mosfets without precaution as they are extremely sensitive to static electricity discharge which you will not even feel but you could be zapping them to death
btw..adam...do you find sayal any good? I dont have luck with those guys...they never have anything instock of what I need...i usually have to call waterloo electronics in little city of waterloo( my home ) and they have a MUCH better selection and can get me anything I want... even the LM12CLK ( 80 watt to3 case) that I could not find anywhere in GTA they got it to me in 2 days flat ...and thats shipped to my work
Thread
Thread Starter
Forum
Replies
Last Post
scotiacustom
General Discussion
9
Mar 23, 2007 08:33 AM
Muckaluck
General Discussion
15
Jun 27, 2004 02:49 AM
