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I blew two transistors on my Minelab Explorer and was able, through one of the members of this forum, to find out the part numbers for these componenes. What I need are C33740 and 32740 transistors. I have been able to find these on the intrnet, but do not need 10000. If anyone could direct me to a site where I can buy these retail it would be greatly appreciated. I also might take on one of the projects in the pi section so a few good ploaces to get hard to get parts would be great.
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Blown Transistors
The C33740 and C23740 are also known as BC337-40 and BC237-40. They are 45V 500mA (npn and pnp respectively) general purpose transistors. The BC237-40 appears to be available from mouser.com for $0.07 each, but the BC237-40 is more illusive. It might be better to replace these with more readily available equivalents. My guess is that they're being used in a push-pull configuration to drive the audio output, so almost any npn/pnp audio driver combination will do the job. I very much doubt that they need to be spec'd to 40V anyway.Originally posted by jhettel -
transistors
I am a bit confused as to the transistors needed for my Minelab Explorer. I did receive an e-mail from someone in upstate New York telling me that the transistors that I needed are as follows: 503 is C32740 and 504 being C33740. My recent reply by Qiaozhe in this thread states 503 as being 23740 rather than 32740. I am not sure if this is a typographical or a substitute. any help would be greatly appreciated.Comment
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Confused
Hmmm.... now I'm also confused. :oOriginally posted by jhettel
Having a second look, it appears that both transistors are of the npn variety, so I'm not sure where that came from. Maybe I shouldn't be trawling this forum late at night.
However, as far as I'm aware, I never referred to either a 503 or 504 transistor.
Anyway, the datasheets for the BC237 and BC337 are attached. Hope this helps.Comment
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transistors
thank you again for your reply. My problem was that in my original posting I had written that the one transistor was 32740, and your reply was for transistor 23740. So I was not sure if the transistor started with the numbers 23, or 32. Please do not be offended because of this question. About all that I know of this subject is what I can read and I do need the transistors and your help has been gratefully received. Thanks againComment
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OK - I can see my stupid mistake. :oOriginally posted by jhettel
This should have been the BC327-40 and BC337-40. Datasheet for the BC327 is attached.
This is a link to mouser for the BC337 ->
http://www.mouser.com/index.cfm?&han...d&N=0&crc=true
But the BC327 appears to be discontinued ->
http://www.mouser.com/index.cfm?&han...d&N=0&crc=true
Since these transistors are used in the audio output stage, I really cannot see why they are rated at 40V. Presumably one of the lower voltage versions would be ok.
In which country do you live?
I know a supplier in the UK who has these in stock, but I think they're the 16V version. They cost the grand total of 12 pence each. It would worth a try.Comment
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thank you for the help. I am in the U.S. but it may be worthwhile to purchase from the UK becasue that my be the easiest way to go about it. If you will send me the data I will get in touch with the company. Thanks again and I will be away from the computer from 10 through 18 June.Comment
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Transistors
Here is the link -> http://www.maplin.co.uk/Originally posted by jhettel
Use the Search box in the top right. Just enter BC327 and BC337.
If they cannot send to U.S., then I have a Maplin shop in a nearby town and can post these to you.
Good luck.Comment
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