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Old 28th September 2012, 02:29 PM   #61
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Quote:
Originally Posted by zakman35 View Post
I have recently found 5 x NEC 2sb248 transistors, new unused, but i cant find any datasheet about them.

Do you have any idea if they worth the trouble to build an amp with them?
Can you point me any suitable circuit?

Thanks in advance
ask there:
Toragi.com
2SB248 - Toragi.com

or there:
NEC EMEA
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Old 28th September 2012, 11:49 PM   #62
GopherT is offline GopherT  United States
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Parameters are listed here. Not exactly a DATASHEET but enough to get started.
2SB248 Datasheet. 2SB248 Equivalent, PDF Data Sheets - Parameters and Characteristics. Electronic Component Catalog.
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Old 30th September 2012, 06:24 PM   #63
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Thank you both.
Do you think they worth the trouble to build and amp based on them?
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Old 30th September 2012, 06:36 PM   #64
GopherT is offline GopherT  United States
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The old PNP germaniums a were used as Class A amplifiers in the late 1950s transistor AM radios in automobiles. Not because the were great or because Class A was great but, instead, because it was cheap, and a lot easier and more reliable than the tube amps they replaced (imagine how long a filament in a tube would last in an old-time car with bad roads and low-tech suspension and plenty of engine vibration.

They are not going to sound amazing, but they might make a unique sound for a low wattage guitar amp. I would at least set up a breadboard to see how it sounds - or if it even works after all these years.
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Old 2nd October 2012, 11:22 AM   #65
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Thanks Gopher, i would follow your advise to see how the sound.
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Old 19th November 2012, 05:21 PM   #66
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Default Young guys may think old things had crappy sound

Not real.... we had beautifull sound in the past...now a days we have a lot of bad sound devices around.... so much or more than we had in the past.

Human ears are the same.... 50 years ago or today...live music also the same..so...old folks knows what is a good sound...maybe young folks have never listened to a live orchestra...some of them do not know what is this.

Listen a recording made with a cheap digital camera.... a Germanium amplifier playing from 1968....old thing, old capacitors (young guys goes replacing all them and fast) and with wonderfull sound.

how audio (could have) sounded on 14 may 1968 - YouTube

regards,

Carlos
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