2N2222 Logo

[Watson A.Name - Watt Sun, Dark Remover]

Check out the pic of a supposedly 2N2222 on
alt.binaries.schematics.electronic newsgroup.
My question is what manufacturer's logo is this.

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
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My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@

 

[Peter Lowrie]

Check out the pic of a supposedly 2N2222 on
alt.binaries.schematics.electronic newsgroup.

Hiya Watson,

My question is what manufacturer's logo is this.

Who cares, really...Replacements are not an issue, are they?

In any case (pardon the pun) could it be an old Radiola?

 

[Lorenzo]

[cut].

My question is what manufacturer's logo is this.

[cut]

Rohm
http://www.rohm.com/

Ciao

 

[Watson A.Name - Watt Sun, Dark Remover]

Hiya Watson,


Who cares, really...Replacements are not an issue, are they?

Well, no, and yes. No, because that particular part number is still
available from that particular manufacturer in that particular
configuration. And yes, because that particular part number is still
available from that particular manufacturer in that particular
configuration. Ya see, the true 2N2222 is a metal can, and all
manufacturers made it that way. It's a registered JEDEC part, and is
a very popular part, just about every project made decades ago used
it. If the average hobbyist were to use this epoxy case version (the
part numbers are the same!), I doubt that the epoxy case version could
handle the power that the metal case 2N2222A can handle. Not to
mention other issues like trying to heatsink the epoxy case version.

It really should not be an epoxy case labeled with that registered
JEDEC part number.

I looked on a website that has many chip mfr's logos, and I didn't see
it. Any ideas? Thanks.

In any case (pardon the pun) could it be an old Radiola?

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@

 

[Peter Lowrie]

Well, no, and yes. No, because that particular part number is still
available from that particular manufacturer in that particular
configuration. And yes, because that particular part number is still
available from that particular manufacturer in that particular
configuration. Ya see, the true 2N2222 is a metal can, and all
manufacturers made it that way. It's a registered JEDEC part, and is
a very popular part, just about every project made decades ago used
it. If the average hobbyist were to use this epoxy case version (the
part numbers are the same!), I doubt that the epoxy case version could
handle the power that the metal case 2N2222A can handle. Not to
mention other issues like trying to heatsink the epoxy case version.

It really should not be an epoxy case labeled with that registered
JEDEC part number.

I looked on a website that has many chip mfr's logos, and I didn't see
it. Any ideas? Thanks.

It's equivalents are:

BSS40 & 41
BSW61...64
2n4014
2n3737

It's a 1/2 watt B>100 silicon NPN.

 

[Watson A.Name - Watt Sun, Dark Remover]

[cut].

My question is what manufacturer's logo is this.

[cut]

Rohm
http://www.rohm.com/

Ciao

I went to the above website and found their list of discretes and
transistors. I couldn't find the 2N2222A that I posted the picture of
on ABSE, so I then clicked on the 2N4403 and came up with this URL
http://www.rohm.com/products/databook/tr/pdf/umt4403.pdf
The reason I chose the 2N4403 was that I bought 100 of them for a
whole five bucks using "buy it now" on Ebay (brand new, still on the
tape). They also have this same logo, and they are all in the true
TO-92 epoxy package. After looking at the picture in the data sheet
at the above URL, I don't believe this is the logo of the maker of the
2N4403s I bought, because the Rohm 2N4403 transistors come in a
smaller, squareish epoxy package, unlike the TO-92 package. And I did
not see any logo in the data sheet. So I doubt that Rohm is the maker
of these transistors.

But I thank you for the info, and wish all a happy holidays.
(OT: We went and saw LOTR Return of the King last night. Awesome
movie, go see it. But read the books if you want the full story.)

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@

 

[Watson A.Name - Watt Sun, Dark Remover]

It's equivalents are:

BSS40 & 41
BSW61...64
2n4014
2n3737

It's a 1/2 watt B>100 silicon NPN.

Thank you, and yes, that's what it is; it's a common, well-documented
transistor. But please see my other followup for the reason why I'm
trying to find out who makes it. Thanks again, and happy holidays.


--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@