What's an SBL capacitor?

bobbyrae · 26th June 2010, 03:05 AM

I ran across this on my schematic. SBL capacitor - what is that? Can't find anything online about it. It seems to be in the FM section of my 70's receiver. Another service manual from the same manufacturer has "BL ceramic capacitor" and I think they are probably the same thing, just different terminology.

Attached are three figures: Two from the schematic and one is the actual cap on the board. (And yes, it's the green thing next to the silver box). I couldn't get a pic of it, but here's what it says on it:

Code:

   V
682 K

Anyone have a clue? What can I replace it with?

bobbyrae · 26th June 2010, 03:30 AM

a closeup showing the lettering on it.

T in AZ · 26th June 2010, 03:54 AM

Looks like a NPO .0068uF

stratus46 · 26th June 2010, 04:18 AM

Quote:

Originally Posted by bobbyrae

I ran across this on my schematic. SBL capacitor - what is that? Can't find anything online about it. It seems to be in the FM section of my 70's receiver. Another service manual from the same manufacturer has "BL ceramic capacitor" and I think they are probably the same thing, just different terminology.

Attached are three figures: Two from the schematic and one is the actual cap on the board. (And yes, it's the green thing next to the silver box). I couldn't get a pic of it, but here's what it says on it:

Code:

   V
682 K

Anyone have a clue? What can I replace it with?

Why do you want to replace it? Do you have the test gear to re-align it?

G²

Elvee · 26th June 2010, 07:38 AM

It is a ceramic, but certainly not a NPO: with traditionnal disc technology, values in excess of 1nF are unreachable. It must be a class II, like Y5something.

bobbyrae · 27th June 2010, 03:53 AM

Why do you want to replace it? Do you have the test gear to re-align it?

G²

I was mainly looking to replace caps on the amp section, but the strange type in the table caused me to stop and wonder. So far, it's the only one, but in case I find one in the amp section, then I need to know what to do with it. And I am sure I need to have the FM section looked at by a tech anyway.

bobbyrae · 29th June 2010, 10:59 AM

I found yet another schematic from this manufacturer (Yamaha). This is from an early 80's tuner. Now they use the black dot to mean "semiconductive ceramic capacitor". So I would now suggest that the S in "SBL" is for semiconductive.

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26th June 2010, 03:54 AM	#3
T in AZ diyAudio Member Join Date: Jul 2009	Looks like a NPO .0068uF

26th June 2010, 07:38 AM	#5
Elvee diyAudio Member Join Date: Sep 2006	It is a ceramic, but certainly not a NPO: with traditionnal disc technology, values in excess of 1nF are unreachable. It must be a class II, like Y5something.

27th June 2010, 03:53 AM	#6
bobbyrae diyAudio Member Join Date: Oct 2009	Why do you want to replace it? Do you have the test gear to re-align it? G² I was mainly looking to replace caps on the amp section, but the strange type in the table caused me to stop and wonder. So far, it's the only one, but in case I find one in the amp section, then I need to know what to do with it. And I am sure I need to have the FM section looked at by a tech anyway.

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