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Crossing NTE transistors to industry numbers

Is there any way possible to determine which industry numbers will
cross to a particular NTE number? I need to replace a fairly large
number of 2N6254 audio output transistors and I have access to many
2SC, 2SD and some 2N numbers etc. The 2N6254 crosses to an NTE181.
Without going through and trying to look up every single one can the
NTE database be run backwards? Or perhaps is there any other way to
extrapolate this information? Thanks very much. Lenny Stein, Barlen
Electronics.
 
M

Michael Black

Jan 1, 1970
0
Is there any way possible to determine which industry numbers will
cross to a particular NTE number? I need to replace a fairly large
number of 2N6254 audio output transistors and I have access to many
2SC, 2SD and some 2N numbers etc. The 2N6254 crosses to an NTE181.
Without going through and trying to look up every single one can the
NTE database be run backwards? Or perhaps is there any other way to
extrapolate this information? Thanks very much. Lenny Stein, Barlen
Electronics.
You think of suitable numbers and then check them in the cross-reference.

I started doing that back in 1974 with an HEP replacement guide, and it was
a good way of getting a basic idea of what a device was. Saved having to
check multiple books just to see whether a transistor was NPN or PNP. The
cross-reference section in the NTE guide is far larger than that old HEP
guide, and of course it's now faster when you can do the look up
electronically.

Michael
 
M

Mike WB2MEP

Jan 1, 1970
0
Is there any way possible to determine which industry numbers will
cross to a particular NTE number? I need to replace a fairly large
number of 2N6254 audio output transistors and I have access to many
2SC, 2SD and some 2N numbers etc. The 2N6254 crosses to an NTE181.
Without going through and trying to look up every single one can the
NTE database be run backwards? Or perhaps is there any other way to
extrapolate this information? Thanks very much. Lenny Stein, Barlen
Electronics.

Lenny,

The older Dalbani catalogs had a reverse NTE cross ref. in them.
I don't know if they still do, or even if they're still in business.

Mike
WB2MEP
 
J

Jim Land

Jan 1, 1970
0
The older Dalbani catalogs had a reverse NTE cross ref. in them.
I don't know if they still do, or even if they're still in business.

Yeah, they're still in business, but they don't seem to carry NTE any more.

http://www.dalbani.com
 
G

GregS

Jan 1, 1970
0
Is there any way possible to determine which industry numbers will
cross to a particular NTE number? I need to replace a fairly large
number of 2N6254 audio output transistors and I have access to many
2SC, 2SD and some 2N numbers etc. The 2N6254 crosses to an NTE181.
Without going through and trying to look up every single one can the
NTE database be run backwards? Or perhaps is there any other way to
extrapolate this information? Thanks very much. Lenny Stein, Barlen
Electronics.

Just using the transistor cross reference, I get 2SD371
Using my Towers book, BDY20 2N3055 (HAhAhA)



Using my Japanese cross booklet for, I get 2SD716 2SC1667

I would check out the specs first on the last two.

off my page
http://www.pitt.edu/~szekeres/shopchip.htm

greg
 
T

Tim Schwartz

Jan 1, 1970
0
Is there any way possible to determine which industry numbers will
cross to a particular NTE number? I need to replace a fairly large
number of 2N6254 audio output transistors and I have access to many
2SC, 2SD and some 2N numbers etc. The 2N6254 crosses to an NTE181.
Without going through and trying to look up every single one can the
NTE database be run backwards? Or perhaps is there any other way to
extrapolate this information? Thanks very much. Lenny Stein, Barlen
Electronics.
Len,

The 2N6254 is a 100V, 15A, 150 watt transistor. MCM Electronics
(www.mcmelectronics.com) has them in stock.

Reverse cross referencing is tricky, as usually the 'universal subs'
choose one transistor to replace many. So, comparing the 2N6254 to the
NTE 181: original here:

They are both rated for 100V

The NTE is rated for 30 amps instead of 15A

The NTE is rated for 200 watts instead of 150 watts.

Unfortunately, by doing a "reverse look up" you don't know if the other
device is good enough, for example, it might be rated only 12 amps. So,
you have to carefully compare the device you are replacing (2N6254) with
the device that you want to replace it with.

While in general, higher break down voltage, higher current and higher
dissipation ratings are OK, they also DON'T tell you about the gain of
the transistor, or the frequency response. If you have a bunch of
output transistors in parallel, they should all be of the same type, and
in a perfect world, gain matched as well, as you want the load spread
evenly across the bank.

The frequency response can also be a problem. If it is too high then
the amp may have problems with oscillations.

When using transistors that I can't curve trace, I try to use the same
lot number in the bank. Sometimes this requires buying a few extra
transistors.

Regards,
Tim Schwartz
Bristol Electronics
 
G

GregS

Jan 1, 1970
0
Just using the transistor cross reference, I get 2SD371
Using my Towers book, BDY20 2N3055 (HAhAhA)



Using my Japanese cross booklet for, I get 2SD716 2SC1667

I would check out the specs first on the last two.

off my page
http://www.pitt.edu/~szekeres/shopchip.htm

Just goes to show you, after checking any replacement guide, verify the specs.
That 2SD371 shows ony 6 amps. Sometimes you can up the current if the voltage
is over rated. Back referencing the 2n3055 you get

ECG130 2N3055 2N3715 2SD878 2SD492 2N3716
2N3055 2N3715 2SD878 2SD492 2N3716 ECG130
2N3234 2N3055 2N6262
2SD492 2N3055 2N3715 2SD878 2N3716 ECG130
2SD878 2N3055 ECG130
96-5397-01 2N3055 2N3716 ECG130
40251 2N3055
BD181 2N3055 ECG130
BDW51A 2N3055
BDY10 2N3055
BDY20 2N3055 ECG130
SJ2515 2N3055
 
J

John Robertson

Jan 1, 1970
0
Is there any way possible to determine which industry numbers will
cross to a particular NTE number? I need to replace a fairly large
number of 2N6254 audio output transistors and I have access to many
2SC, 2SD and some 2N numbers etc. The 2N6254 crosses to an NTE181.
Without going through and trying to look up every single one can the
NTE database be run backwards? Or perhaps is there any other way to
extrapolate this information? Thanks very much. Lenny Stein, Barlen
Electronics.

http://www.flippers.com/X-Ref-ECG.html

ECG = TCG...

John :-#)#
--
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Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call
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www.flippers.com "Old pinballers never die, they
just flip out."
 
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