Should I toss out these old transistors?

Captn Dave · 18th April 2010, 07:41 AM

I picked up a nice hoard of useful parts at an estate sale the other day. It included a cigar box full of old transistors. I'm inclined to toss them out but since I'm not particularly interested in or knowledgeable about solid state, I thought I'd first inquire.

They are all TO-204 and TO-3 cases, I think. Mostly Motorola and TI. Here are a few typical numbers:
1n2810a
1n2820a
2234-1
2n5876
hep230
5201-1
mp1545
2n5878

Also a bunch of herky looking diodes. 1N2990 etc.

What do you think? Toss them in the trash or the swap board?

Thanks

Rembrant · 18th April 2010, 07:55 AM

2n5876 I would keep those. The rest I would have to look up to find out.

Captn Dave · 18th April 2010, 03:23 PM

Quote:

Originally Posted by Rembrant

2n5876 I would keep those. The rest I would have to look up to find out.

What would be a typical application?

godfrey · 18th April 2010, 04:56 PM

Some interesting stuff you got there...

HEP230 and MP1545 are Germanium power transistors.
1N2810 and 1N2820 are 50W power zeners (12V and 24V respectively).

2n5876 and 2n5878 are silicon power transistors (boring but useful).

According to Google, a 5201-1 is an adjustable voltage regulator whereas "2234-1" could have something to do with dwarfs, reptiles, antibodies or glue.

indianajo · 20th April 2010, 12:44 PM

datasheetcatalog.com is useful for looking stuff up. There is a commercial section of this forum for selling off stuff you don't need. organforum.com and music-electronics-forum.com have people on them that need obsolete stuff from time to time. There was a guy recently looking for germanium transistors to rebuild a Farfisa organ with. Apparently the salt air of Italy or the acid core flux possibly used had rusted all the leads off his transistors.

Captn Dave · 20th April 2010, 02:10 PM

Thanks. I posted a complete list in the swap section. I had to locate some old transistors for a guitar amp repair last year so I can appreciate the need for obsolete solid state stuff.

18th April 2010, 07:41 AM	#1
Captn Dave diyAudio Member Join Date: Jun 2008	Should I toss out these old transistors? I picked up a nice hoard of useful parts at an estate sale the other day. It included a cigar box full of old transistors. I'm inclined to toss them out but since I'm not particularly interested in or knowledgeable about solid state, I thought I'd first inquire. They are all TO-204 and TO-3 cases, I think. Mostly Motorola and TI. Here are a few typical numbers: 1n2810a 1n2820a 2234-1 2n5876 hep230 5201-1 mp1545 2n5878 Also a bunch of herky looking diodes. 1N2990 etc. What do you think? Toss them in the trash or the swap board? Thanks

20th April 2010, 12:44 PM	#5
indianajo diyAudio Member Join Date: Jan 2010 Location: Jeffersonville, Indiana USA	lookup datasheetcatalog.com is useful for looking stuff up. There is a commercial section of this forum for selling off stuff you don't need. organforum.com and music-electronics-forum.com have people on them that need obsolete stuff from time to time. There was a guy recently looking for germanium transistors to rebuild a Farfisa organ with. Apparently the salt air of Italy or the acid core flux possibly used had rusted all the leads off his transistors. __________________ Dynakit ST70, ST120, PAS2,Hammond H182(2 ea),H112,A100,10-82TC,Peavey CS800S,SP2-XT's, T-300 HF Projs, Steinway console, Herald RA88a mixer, Wurlitzer 4500

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18th April 2010, 07:55 AM	#2
Rembrant diyAudio Member Join Date: Mar 2007	2n5876 I would keep those. The rest I would have to look up to find out.

18th April 2010, 04:56 PM	#4
godfrey diyAudio Member Join Date: Nov 2009 Location: Cape Town	Some interesting stuff you got there... HEP230 and MP1545 are Germanium power transistors. 1N2810 and 1N2820 are 50W power zeners (12V and 24V respectively). 2n5876 and 2n5878 are silicon power transistors (boring but useful). According to Google, a 5201-1 is an adjustable voltage regulator whereas "2234-1" could have something to do with dwarfs, reptiles, antibodies or glue.

20th April 2010, 02:10 PM	#6
Captn Dave diyAudio Member Join Date: Jun 2008	Thanks. I posted a complete list in the swap section. I had to locate some old transistors for a guitar amp repair last year so I can appreciate the need for obsolete solid state stuff.

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