What is this

jnb · 4th June 2007, 06:15 AM

It is from the mains side of a smps.

Frank Berry · 4th June 2007, 06:16 AM

It looks like a fuse. The ultimate flameproof fuse.

impsick · 4th June 2007, 06:18 AM

it does look like a fuse but i had some glass resisters that looked like fuses similar to that.

peranders · 4th June 2007, 06:35 AM

It could possibly be a neon lamp. Is there any gap between the "resistor" and the wire in the bulb?

jnb · 4th June 2007, 12:57 PM

No, under the heatshrink it is connected as for the other side. It measures an open and is marked as follows:

D668
DSA
302H

ernesto1 · 4th June 2007, 01:33 PM

It may be a resistor which can handle lots of power without burning out. Like a bulb or lamp which is under a vacuum. When the output power increases going through it, its resistance goes up, but can handle lots of power, because the air will not get to it and burn it up as quickly as if it was exposed to the air. Like a safeguard for a output stage to allow compression when the output stage reaches critical output level.

jacco vermeulen · 4th June 2007, 02:04 PM

How about thermal stability.

jnb · 5th June 2007, 07:46 AM

Oh, like a filament that acts like a quasi CCS you mean, like Pass' en-lightenment? Interesting. I wonder if it would be of any use in an amp?

jacco vermeulen · 5th June 2007, 09:28 AM

I haven't read someone mentioning the sleeve.
Odd sleeve for a resistor lead, no ?

impsick · 5th June 2007, 10:49 AM

not really. i always see heat shrink on the leads of resisters and diodes, in older gear.

4th June 2007, 06:16 AM	#2
Frank Berry diyAudio Member Join Date: Sep 2003 Location: Midland, Michigan	It looks like a fuse. The ultimate flameproof fuse. __________________ Frank

4th June 2007, 06:18 AM	#3
impsick diyAudio Member Join Date: Dec 2006	it does look like a fuse but i had some glass resisters that looked like fuses similar to that. __________________ "Nothing happens for a reason. There are just reasons why things happen." Quote me on that. http://stores.ebay.com/AudioGrade?_rdc=1

4th June 2007, 06:35 AM	#4
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	It could possibly be a neon lamp. Is there any gap between the "resistor" and the wire in the bulb? __________________ /Per-Anders (my first name) or P-A as my friends call me

5th June 2007, 09:28 AM	#9
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	I haven't read someone mentioning the sleeve. Odd sleeve for a resistor lead, no ? __________________ Looks like Sponge Bob has killed another thread.

5th June 2007, 10:49 AM	#10
impsick diyAudio Member Join Date: Dec 2006	not really. i always see heat shrink on the leads of resisters and diodes, in older gear. __________________ "Nothing happens for a reason. There are just reasons why things happen." Quote me on that. http://stores.ebay.com/AudioGrade?_rdc=1


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4th June 2007, 12:57 PM	#5
jnb diyAudio Member Join Date: Dec 2006	No, under the heatshrink it is connected as for the other side. It measures an open and is marked as follows: D668 DSA 302H

4th June 2007, 01:33 PM	#6
ernesto1 diyAudio Member Join Date: Jun 2007	It may be a resistor which can handle lots of power without burning out. Like a bulb or lamp which is under a vacuum. When the output power increases going through it, its resistance goes up, but can handle lots of power, because the air will not get to it and burn it up as quickly as if it was exposed to the air. Like a safeguard for a output stage to allow compression when the output stage reaches critical output level.

5th June 2007, 07:46 AM	#8
jnb diyAudio Member Join Date: Dec 2006	Oh, like a filament that acts like a quasi CCS you mean, like Pass' en-lightenment? Interesting. I wonder if it would be of any use in an amp?

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