Is this an RCA 2N3055?

[Mark Harriss]

I scored some TO3 transistors on Ebay
a while ago as 2N3055's, most are labelled:

"RCA" in the middle with "A 13" around the top
and around the bottom a "H" then a few spaces
and "8024".

Can anyone help with these markings?

tia
Mark Harriss

 

[Phil Allison]

"Mark Harriss"

I scored ...

** The party selling them may have "scored" instead.

some TO3 transistors on Ebay a while ago as 2N3055's,
most are labelled:
"RCA" in the middle with "A 13" around the top
and around the bottom a "H" then a few spaces
and "8024".

Can anyone help with these markings?

** If they are fakes then the markings are fake.

Any mental midget would easily figure that out.

But not a dead fucking cunt like the one who posted this absurdity.

How is your intestinal tape worm going - Mark ??





......... Phil

 

[Tony Pearce]

"Phil Allison" <philallison@optusnet.com.au> wrote in message
news:40277fce$0$15134$afc38c87@news.optusnet.com.au...

** If they are fakes then the markings are fake.

Sure, but 2N3055's are what people usually use to substitute for real
transistors, not vice versa!
Are there any cheaper TO3 transistors that would actually be worth
substituting for 2N3055's?

TonyP.

 

[Mark Harriss]

Apparently they are 2N3055's made for ICL
in the UK, with custom markings from the early 1970's
and 80's I have been informed.

 

[The Real Andy]

"Mark Harriss" <ningauble@removethis.bigpond.com> wrote in message
news:3L4Wb.50734$Wa.7217@news-server.bigpond.net.au...

Apparently they are 2N3055's made for ICL
in the UK, with custom markings from the early 1970's
and 80's I have been informed.

I don't know what you intend using them for, but the 3055 isn't a
particularly glamerous transistor anyway. You will probably find the parts
you bought will do the job if they are not actually 3055's

 

[Zebulon Blah]

I don't know what you intend using them for, but the 3055 isn't a
particularly glamerous transistor anyway.

Disagree! the 2N3055 is one of the most useful transistors ever made.
I have four of them sitting right next to me inside a 12V 20 amp power supply.
I also have a stereo amplifier using four more 2N3055's. All home-made.

Z

 

[KLR]

On Fri, 13 Feb 2004 23:33:34 GMT, Zebulon Blah <wanker@myrealbox.com>
wrote:

I don't know what you intend using them for, but the 3055 isn't a
particularly glamerous transistor anyway.

Disagree! the 2N3055 is one of the most useful transistors ever made.
I have four of them sitting right next to me inside a 12V 20 amp power supply.
I also have a stereo amplifier using four more 2N3055's. All home-made.

Z

I dont think he meant that it was useless or junk - but that it was a
pretty basic and old design and that much had come along since that is
a lot better and would have no troubles doing the same job.


I suppose kind of like the 555.

30 year old technology, definitely not glamourous or high tech by any
means compared to more modern solutions such as PICs etc, but still
quite popular, still cheap, easy for beginners to use, still useful
for many things and surprisingly adaptable to many timing applications
and uses - even in modern times.

 

[Phil Allison]

<KLR> wrote in message

On Fri, 13 Feb 2004 23:33:34 GMT, Zebulon Blah <wanker@myrealbox.com
wrote:

I don't know what you intend using them for, but the 3055 isn't a
particularly glamerous transistor anyway.

Disagree! the 2N3055 is one of the most useful transistors ever made.
I have four of them sitting right next to me inside a 12V 20 amp power
supply.
I also have a stereo amplifier using four more 2N3055's. All home-made.


I dont think he meant that it was useless or junk - but that it was a
pretty basic and old design and that much had come along since that is
a lot better and would have no troubles doing the same job.

** Do you know of a T03 bipolar device that is both cheaper and better than
a 2N3055 ????

Do you know of a plastic equivalent that is cheaper and better ???

If you have trouble coming up with examples then Zebulon has a good
point.




............ Phil

 

[The Real Andy]

"Phil Allison" <philallison@optusnet.com.au> wrote in message
news:402d7339$0$5862$afc38c87@news.optusnet.com.au...

KLR> wrote in message

On Fri, 13 Feb 2004 23:33:34 GMT, Zebulon Blah <wanker@myrealbox.com
wrote:

I don't know what you intend using them for, but the 3055 isn't a
particularly glamerous transistor anyway.

Disagree! the 2N3055 is one of the most useful transistors ever made.
I have four of them sitting right next to me inside a 12V 20 amp power
supply.
I also have a stereo amplifier using four more 2N3055's. All home-made.


I dont think he meant that it was useless or junk - but that it was a
pretty basic and old design and that much had come along since that is
a lot better and would have no troubles doing the same job.


** Do you know of a T03 bipolar device that is both cheaper and better
than
a 2N3055 ????

That really depends on the application.

Do you know of a plastic equivalent that is cheaper and better ???

Once again, that really depends on the application.

If you have trouble coming up with examples then Zebulon has a good
point.

The point I was trying to make was that if he was using the parts for
example, as a pass transistors in a power supply, then what he got will
probably be fine. Ie, you dont need a fancy modern transistor to do such a
simple job.

 

[Phil Allison]

"The Real Andy" <i_luv_beer_especially_pilsners@yahoo.com.au>

** Do you know of a T03 bipolar device that is both cheaper and better
than> a 2N3055 ????

That really depends on the application.

** You did not comprehend the question.

Do you know of a plastic equivalent that is cheaper and better ???

Once again, that really depends on the application.

** You did not comprehend the question.

If you have trouble coming up with examples then Zebulon has a
good
point.

The point I was trying to make .....

** Hindsight is all done with 20 / 20 vision.




........... Phil

 

[Mark Harriss]

I don't know what you intend using them for, but the 3055 isn't a
particularly glamerous transistor anyway. You will probably find the parts
you bought will do the job if they are not actually 3055's

I opened one up recently for a look, the die is about four times the
area of a 2N3055 and looks identical to a MJ15003 photo I'd seen. It even
has metal straps instead of the aluminium wires of a '3055. I'm pretty
happy with the purchase now.


Mark Harriss

 

[Phil Allison]

"Mark Harriss" <

I opened one up recently for a look, the die is about four times the
area of a 2N3055

** The chip areas of different brand 2N3055s varies greatly - it proves
very little since the top performing Motorola ones had the smallest chips of
all at only 2.3 mm square.

and looks identical to a MJ15003 photo I'd seen. It even
has metal straps instead of the aluminium wires of a '3055.

** 2N3055s often had pressed metal chip bonding contacts, while MJ15003s
used fusible aluminium bonding wires - the MJ15003 chip is normally 4.5mm
x 5 mm .



......... Phil