Anyone know what these are?

planet10 · 28th August 2003, 02:14 AM

I ran across some of these shiny semi-conductors... i figured it would be quicker to ask here than try to figure out where to look on the net.

dave
planet10/lost when it comes to SS

SY · 28th August 2003, 02:47 AM

Wow, that '441 is even older than me. PNP, germanium, 40V Vces, 150W dissipation.

Duo · 28th August 2003, 02:54 AM

I have a whole bunch of those big round Ge transistors.
I'm going to make some sort of quasi complimentary amp with them when I get time.

planet10 · 28th August 2003, 02:59 AM

Quote:

Originally posted by Duo
I have a whole bunch of those big round Ge transistors.
I'm going to make some sort of quasi complimentary amp with them when I get time.

This example came from Nanaimo...

dave

Duo · 28th August 2003, 04:03 AM

Interesting... Mine actually came out of a power supply that I believe was originally for a UNIVAC computer. I've used the old chassis for my next project, the 900W per channel amp.

The transistors must have been the very best of their time, especially with their current and power ratings. Mine will to 30A but they are a slightly different type from yours.

JOE DIRT® · 28th August 2003, 06:41 AM

oohhhhh..those are older than the DIRT

Pjotr · 28th August 2003, 11:55 AM

Hi, here is another 2N441:

My dad fiddled an “electronic ignition” together with these for his 2 stroke DKW long time ago. He also used a Siemens AD3 for it. But for nowadays audio

maybe if your audio bandwidth is limited to old AM standards

Cheers

peranders · 28th August 2003, 12:00 PM

Anyone who want to see my AD161/162? I have tears in my eyes

My childhood is passing by.

paulb · 28th August 2003, 12:00 PM

Those big Ge transistors were used as the output stage of car radios, even when the rest of the radio used vacuum tubes. Thus the Delco / GM brand.

Duo · 28th August 2003, 03:12 PM

Yeah, I have a few 441's actually. I've never seen them used in a radio with tubes. But I've seen many radios with just solid state using a 441 for the output... Lol, it was at least class A, you have to give it that.

I think if they're pushed hard enough one could get respectable bandwidth out of them. I've seen some circuits that get amazing bandwidth out of some really slow old transistors. Transistors that could almost pass as 3pin caps!

28th August 2003, 02:47 AM	#2
SY diyAudio Moderator Join Date: Oct 2002 Location: Chicagoland Blog Entries: 1	Wow, that '441 is even older than me. PNP, germanium, 40V Vces, 150W dissipation. __________________ If there's a sucker born every minute, where do the rest of them come from?

28th August 2003, 02:54 AM	#3
Duo diyAudio Member Join Date: Jun 2002 Location: Victoria, BC, Canada	I have a whole bunch of those big round Ge transistors. I'm going to make some sort of quasi complimentary amp with them when I get time. __________________ -- Duo, W1ngs, VA7MON, and lesser known handles. -- -- http://www.w1ngselectronics.com -- My Work and Projects --

28th August 2003, 04:03 AM	#5
Duo diyAudio Member Join Date: Jun 2002 Location: Victoria, BC, Canada	Interesting... Mine actually came out of a power supply that I believe was originally for a UNIVAC computer. I've used the old chassis for my next project, the 900W per channel amp. The transistors must have been the very best of their time, especially with their current and power ratings. Mine will to 30A but they are a slightly different type from yours. __________________ -- Duo, W1ngs, VA7MON, and lesser known handles. -- -- http://www.w1ngselectronics.com -- My Work and Projects --

28th August 2003, 12:00 PM	#8
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Anyone who want to see my AD161/162? I have tears in my eyes My childhood is passing by. __________________ /Per-Anders (my first name) or P-A as my friends call me Tube Buffered Gainclone in work \|Thread

28th August 2003, 03:12 PM	#10
Duo diyAudio Member Join Date: Jun 2002 Location: Victoria, BC, Canada	Yeah, I have a few 441's actually. I've never seen them used in a radio with tubes. But I've seen many radios with just solid state using a 441 for the output... Lol, it was at least class A, you have to give it that. I think if they're pushed hard enough one could get respectable bandwidth out of them. I've seen some circuits that get amazing bandwidth out of some really slow old transistors. Transistors that could almost pass as 3pin caps! __________________ -- Duo, W1ngs, VA7MON, and lesser known handles. -- -- http://www.w1ngselectronics.com -- My Work and Projects --


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28th August 2003, 06:41 AM	#6
JOE DIRT® diyAudio Member Join Date: Apr 2003 Location: Brantford, ON	oohhhhh..those are older than the DIRT

28th August 2003, 11:55 AM	#7
Pjotr diyAudio Member Join Date: Nov 2002 Location: Netherlands	Hi, here is another 2N441: My dad fiddled an “electronic ignition” together with these for his 2 stroke DKW long time ago. He also used a Siemens AD3 for it. But for nowadays audio maybe if your audio bandwidth is limited to old AM standards Cheers

28th August 2003, 12:00 PM	#9
paulb diyAudio Member Join Date: Jun 2001 Location: Calgary	Those big Ge transistors were used as the output stage of car radios, even when the rest of the radio used vacuum tubes. Thus the Delco / GM brand.

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