opened up an old amp with glass caps(?)

impsick · 21st December 2006, 08:43 AM

i raped an old sansui( spelling ?) today and found a bunch of Elna caps which is cool cuz i needed the ratings it had inside.

but i came across some glass caps. low ratings mostly. small in size. whats the deal with these? any body familiar with glass caps?

pinkmouse · 21st December 2006, 09:03 AM

Pics?

impsick · 22nd December 2006, 03:20 AM

ok ill put some pics up once i get home. im not 100% sure they're caps but on the pcb they are in the spots labled w/ a C####

bobgroger · 22nd December 2006, 04:20 AM

Might be Polystyrene. Clear plastic body with silver foil inside. Stable, decent tolerances, prone to short IIRC.

Bob G.

impsick · 22nd December 2006, 07:28 PM

yes bob those are them.
sorry havent made it home yet to put pics up but ill do that anyways cuz there were some big elna caps in there too.

I_Forgot · 22nd December 2006, 07:35 PM

Those caps are quite reliable, and very high performance. The reason you don't see more of them is that for a while no one was making them. I think there is at least one company that does now, but the others that stopped, stopped because there was no way to make them in chip form. The problem is that the dielectric melts at very low temperatures, so soldering them is tricky. With a leaded part you can clamp a heat sink on the lead being soldered to keep the heat from going up into the part and melting the dilectric. With chip caps there is no way to do it.

Keep those caps, and be careful with them when you solder them.

I_F

impsick · 23rd December 2006, 12:49 AM

i forgot,

thanks alot for that info. very useful. i would have melted them all. haha. good looking out.

impsick · 23rd December 2006, 04:42 AM

ok got some pics now...

these transistors are glass. whats the deal with these guys?

also inside was some other caps...

oh and check out these guys with the heat sinks on them. one has a diode on top of it

djQUAN · 23rd December 2006, 04:47 AM

I have come across "real" glass caps.

they look like the diode in the second pic but you can see an SMD chip capacitor inside it.

impsick · 23rd December 2006, 04:58 AM

the first pic is a real glass cap. the reflection just made it look as though its not see through. and in the 2nd pic if you look to the left, thats a glass cap. a "real" one

21st December 2006, 08:43 AM	#1
impsick diyAudio Member Join Date: Dec 2006 Location: Huntington Beach, Ca	opened up an old amp with glass caps(?) i raped an old sansui( spelling ?) today and found a bunch of Elna caps which is cool cuz i needed the ratings it had inside. but i came across some glass caps. low ratings mostly. small in size. whats the deal with these? any body familiar with glass caps? __________________ "Nothing happens for a reason. There are just reasons why things happen." Quote me on that. http://stores.ebay.com/AudioGrade?_rdc=1

21st December 2006, 09:03 AM	#2
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	Pics? __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

22nd December 2006, 03:20 AM	#3
impsick diyAudio Member Join Date: Dec 2006 Location: Huntington Beach, Ca	ok ill put some pics up once i get home. im not 100% sure they're caps but on the pcb they are in the spots labled w/ a C#### __________________ "Nothing happens for a reason. There are just reasons why things happen." Quote me on that. http://stores.ebay.com/AudioGrade?_rdc=1

22nd December 2006, 07:28 PM	#5
impsick diyAudio Member Join Date: Dec 2006 Location: Huntington Beach, Ca	yes bob those are them. sorry havent made it home yet to put pics up but ill do that anyways cuz there were some big elna caps in there too. __________________ "Nothing happens for a reason. There are just reasons why things happen." Quote me on that. http://stores.ebay.com/AudioGrade?_rdc=1

23rd December 2006, 12:49 AM	#7
impsick diyAudio Member Join Date: Dec 2006 Location: Huntington Beach, Ca	i forgot, thanks alot for that info. very useful. i would have melted them all. haha. good looking out. __________________ "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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22nd December 2006, 07:35 PM	#6
I_Forgot diyAudio Member Join Date: Jan 2005 Location: Phoenix, Az.	Those caps are quite reliable, and very high performance. The reason you don't see more of them is that for a while no one was making them. I think there is at least one company that does now, but the others that stopped, stopped because there was no way to make them in chip form. The problem is that the dielectric melts at very low temperatures, so soldering them is tricky. With a leaded part you can clamp a heat sink on the lead being soldered to keep the heat from going up into the part and melting the dilectric. With chip caps there is no way to do it. Keep those caps, and be careful with them when you solder them. I_F

23rd December 2006, 04:42 AM	#8
impsick diyAudio Member Join Date: Dec 2006 Location: Huntington Beach, Ca	ok got some pics now... these transistors are glass. whats the deal with these guys? also inside was some other caps... oh and check out these guys with the heat sinks on them. one has a diode on top of it __________________ "Nothing happens for a reason. There are just reasons why things happen." Quote me on that. http://stores.ebay.com/AudioGrade?_rdc=1

23rd December 2006, 04:47 AM	#9
djQUAN diyAudio Member Join Date: May 2004 Location: manila	I have come across "real" glass caps. they look like the diode in the second pic but you can see an SMD chip capacitor inside it.

23rd December 2006, 04:58 AM	#10
impsick diyAudio Member Join Date: Dec 2006 Location: Huntington Beach, Ca	the first pic is a real glass cap. the reflection just made it look as though its not see through. and in the 2nd pic if you look to the left, thats a glass cap. a "real" one __________________ "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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