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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.
"captainvideo462...@yahoo.com" (captainvideo462...@yahoo.com) writes: > 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.
captainvideo462...@yahoo.com wrote: > 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.
In article <1158091513.605989.127...@i3g2000cwc.googlegroups.com>, "captainvideo462...@yahoo.com" <captainvideo462...@yahoo.com> wrote:
>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.
captainvideo462...@yahoo.com wrote: > 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.
In article <ee8ttk$d6...@usenet01.srv.cis.pitt.edu>, szeke...@pitt.edu (GregS) wrote: >In article <1158091513.605989.127...@i3g2000cwc.googlegroups.com>, > "captainvideo462...@yahoo.com" <captainvideo462...@yahoo.com> wrote: >>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.
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
On 2006-09-12 13:05:13 -0700, "captainvideo462...@yahoo.com" <captainvideo462...@yahoo.com> said:
> 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.
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