| Author |
Message |
Jimbo
Guest
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 Posted:
Thu Feb 10, 2005 12:49 am Post subject:
Pyle output transistors replacements |
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Hi,
I have a pyle car audio amp (sorry no model number here at work) that
I need to order some output transistors. Numbers are 2SC4466 and
2SA1693.
Do I need to find a matched pair of these or is ok to just order some
and replace them?
Also any links where to purchase (in the USA) would be appreciated.
TIA
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DaveM
Guest
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| Posted:
Thu Feb 10, 2005 7:21 am Post subject:
Re: Pyle output transistors replacements |
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http://mcm.newark.com has both transistors... the 2SC4466 @ $2.14, the
2SA1693 @ $5.79. And they are in the good old USA!!!
And if these are output transistors, yes, a matched pair would be desirable,
but not mandatory to get the amp running, Not having a matched pair will
result in some distortion, from unnoticable to very bad, depending on the
level of mismatching. Very poor matching could result in the transistors
destroying themselves after running for a while.
--
Dave M
MasonDG44 at comcast dot net (Just subsitute the appropriate characters in
the address)
Never take a laxative and a sleeping pill at the same time!!
"Jimbo" <crater@caterius.com> wrote in message
news:1hmk01djf54kce0ffseeu0k7qsu1v4scqs@4ax.com...
| Quote: | Hi,
I have a pyle car audio amp (sorry no model number here at work) that
I need to order some output transistors. Numbers are 2SC4466 and
2SA1693.
Do I need to find a matched pair of these or is ok to just order some
and replace them?
Also any links where to purchase (in the USA) would be appreciated.
TIA |
|
|
| Back to top |
|
|
Jimbo
Guest
|
| Posted:
Thu Feb 10, 2005 8:04 am Post subject:
Re: Pyle output transistors replacements |
|
|
On Wed, 9 Feb 2005 20:21:50 -0500, "DaveM" <masondg4499@comcast99.net>
wrote:
| Quote: | http://mcm.newark.com has both transistors... the 2SC4466 @ $2.14, the
2SA1693 @ $5.79. And they are in the good old USA!!!
And if these are output transistors, yes, a matched pair would be desirable,
but not mandatory to get the amp running, Not having a matched pair will
result in some distortion, from unnoticable to very bad, depending on the
level of mismatching. Very poor matching could result in the transistors
destroying themselves after running for a while.
|
Thanks for the info... espicially regarding the mismatch. I also found
some at mcmelectronics as well. Actually I think they are the same
company ??
Guess I will get some and find out about the match.
Jim
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DaveM
Guest
|
| Posted:
Fri Feb 11, 2005 4:06 am Post subject:
Re: Pyle output transistors replacements |
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|
"Jimbo" <crater@caterius.com> wrote in message
news:75gl01li07n46e0bse7u3ore9qm108daeo@4ax.com...
| Quote: | On Wed, 9 Feb 2005 20:21:50 -0500, "DaveM" <masondg4499@comcast99.net
wrote:
http://mcm.newark.com has both transistors... the 2SC4466 @ $2.14, the
2SA1693 @ $5.79. And they are in the good old USA!!!
And if these are output transistors, yes, a matched pair would be
desirable,
but not mandatory to get the amp running, Not having a matched pair will
result in some distortion, from unnoticable to very bad, depending on the
level of mismatching. Very poor matching could result in the transistors
destroying themselves after running for a while.
Thanks for the info... espicially regarding the mismatch. I also found
some at mcmelectronics as well. Actually I think they are the same
company ??
Guess I will get some and find out about the match.
Jim
Yes, same company. If you can spare the change, you might get several sets |
and select the pair that give you the most balanced voltage readings. If
these are a complementary pair ( they likely are), select the set that gives
you a voltage as close to 0V on the output as possible.
--
Dave M
MasonDG44 at comcast dot net (Just subsitute the appropriate characters in
the address)
Never take a laxative and a sleeping pill at the same time!! |
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James Sweet
Guest
|
| Posted:
Fri Feb 11, 2005 6:11 am Post subject:
Re: Pyle output transistors replacements |
|
|
"DaveM" <masondg4499@comcast99.net> wrote in message
news:ca2dncVAFOppR5bfRVn-tw@comcast.com...
| Quote: |
"Jimbo" <crater@caterius.com> wrote in message
news:75gl01li07n46e0bse7u3ore9qm108daeo@4ax.com...
On Wed, 9 Feb 2005 20:21:50 -0500, "DaveM" <masondg4499@comcast99.net
wrote:
http://mcm.newark.com has both transistors... the 2SC4466 @ $2.14, the
2SA1693 @ $5.79. And they are in the good old USA!!!
And if these are output transistors, yes, a matched pair would be
desirable,
but not mandatory to get the amp running, Not having a matched pair
will
result in some distortion, from unnoticable to very bad, depending on
the
level of mismatching. Very poor matching could result in the
transistors
destroying themselves after running for a while.
Thanks for the info... espicially regarding the mismatch. I also found
some at mcmelectronics as well. Actually I think they are the same
company ??
Guess I will get some and find out about the match.
Jim
Yes, same company. If you can spare the change, you might get several
sets
and select the pair that give you the most balanced voltage readings. If
these are a complementary pair ( they likely are), select the set that
gives
you a voltage as close to 0V on the output as possible.
|
There's simple circuits on http://users.ece.gatech.edu/~mleach/lowtim/ that
allow you to match transistors, just a couple resistors, a power source and
a DMM are required. |
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