Are these Caps or Resistors?

octopus · 14th July 2003, 12:27 PM

I'm working on a commercial speaker but having trouble with the components. The image below shows a 2-way crossover, but I can't figure out what the yellow components are. The little one has 395J and the other has 106J on there bodies. There is already a capacitor there so are these yellow things resistors?

I have a schematic of the circuit (that I made) if that helps.

Brett D. · 14th July 2003, 08:27 PM

The yellow items are non polar capacitors, the capactitor sticking
up off the board is a polar capacitor, the white rectangle is a
ceramic resistor and the two round pieces of ferrite with wire
wound on them are inductors.

MarcelvdG · 14th July 2003, 08:40 PM

I agree with Brett. The yellow thing with 395J written on it is a foil capacitor with a value of 39*10^5pF=3.9uF +/- 5%. The one with 106J written on it is a foil capacitor with a value of 10*10^6pF=10uF +/- 5%. (J is a tolerance code for +/- 5%.) The white thing with 2R2 J on it is a 2.2 ohm +/- 5% wirewound power resistor in a ceramic package.

octopus · 14th July 2003, 09:07 PM

Thanks very much guys.

LaMa · 15th July 2003, 09:12 AM

Quote:

Originally posted by MarcelvdG
I agree with Brett. The yellow thing with 395J written on it is a foil capacitor with a value of 39*10^5pF=3.9uF +/- 5%. The one with 106J written on it is a foil capacitor with a value of 10*10^6pF=10uF +/- 5%. (J is a tolerance code for +/- 5%.) The white thing with 2R2 J on it is a 2.2 ohm +/- 5% wirewound power resistor in a ceramic package.

Do you have a complete list of the tolerance codes?

MarcelvdG · 15th July 2003, 11:41 AM

LaMa,

I used to have a list, but I don't know if I still have it somewhere. A few that I know by heart are:

F +/- 1%
G +/- 2%
H +/- 2.5%
J +/- 5%
K +/- 10%
M +/- 20%
P +100/-0 %
Z +80/-20 % (I'm not completely sure about this one).

octopus · 16th July 2003, 03:35 PM

OKay, here comes the reason why I needed to know this...

I wanted to add a zobel network (experimentally) to the crossover and make the circuit path shorter. The result?

A tiny crossover for the tweeter - unaltered except the inductor goes after the two caps.

The woofer and tweeter crossover in the enclosure - the blue capacitor and white resistor are the zobel section.

I've written up the entire proceedure from start to beginning on another forum - http://forum.hifichoice.co.uk/viewtopic.php?t=6055

The result is very positive - I hear more that I did before and it sounds so much more natural.
I also upgraded the cable wire - thick for bass and thin for treble which is much better

Thanks again

Brett D. · 17th July 2003, 01:59 AM

What OEM speaker are those XO's out of?

I was going to spend some money and upgrade my XO's (shown
below) with AudioCap Theta's, Mills Resistors and Jantzen Foil
Inductors but ultimately I just decided to leave them alone and
build new speakers. I did rewire everything with 12Awg though.

planet10 · 17th July 2003, 07:08 AM

Quote:

Originally posted by Brett D.
the capactitor sticking up off the board is a polar capacitor

Much more likely is is a bi-polar electrolytic, likely in the bass circuit.

dave

octopus · 17th July 2003, 12:24 PM

"What OEM speaker are those XO's out of?"

Eltax Linear Response 6.5 circa 1998, discontinued now.

"Much more likely is is a bi-polar electrolytic, likely in the bass circuit."

I think it is bi-polar, it has "BP" labelled on the side. The electrolytic capacitor I used for the zobel is also BP.

For the second speaker I left out the black capacitor (10microfarad), will this effect the sound much? I haven't actually done some real listening yet.

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14th July 2003, 08:27 PM	#2
Brett D. diyAudio Member Join Date: Apr 2003 Location: Greensburg, PA	The yellow items are non polar capacitors, the capactitor sticking up off the board is a polar capacitor, the white rectangle is a ceramic resistor and the two round pieces of ferrite with wire wound on them are inductors.

14th July 2003, 08:40 PM	#3
MarcelvdG diyAudio Member Join Date: Mar 2003 Location: Haarlem, the Netherlands	I agree with Brett. The yellow thing with 395J written on it is a foil capacitor with a value of 3910^5pF=3.9uF +/- 5%. The one with 106J written on it is a foil capacitor with a value of 1010^6pF=10uF +/- 5%. (J is a tolerance code for +/- 5%.) The white thing with 2R2 J on it is a 2.2 ohm +/- 5% wirewound power resistor in a ceramic package.

14th July 2003, 09:07 PM	#4
octopus diyAudio Member Join Date: Jul 2003 Location: Darlington	Thanks very much guys.

15th July 2003, 11:41 AM	#6
MarcelvdG diyAudio Member Join Date: Mar 2003 Location: Haarlem, the Netherlands	LaMa, I used to have a list, but I don't know if I still have it somewhere. A few that I know by heart are: F +/- 1% G +/- 2% H +/- 2.5% J +/- 5% K +/- 10% M +/- 20% P +100/-0 % Z +80/-20 % (I'm not completely sure about this one).

16th July 2003, 03:35 PM	#7
octopus diyAudio Member Join Date: Jul 2003 Location: Darlington	OKay, here comes the reason why I needed to know this... I wanted to add a zobel network (experimentally) to the crossover and make the circuit path shorter. The result? A tiny crossover for the tweeter - unaltered except the inductor goes after the two caps. The woofer and tweeter crossover in the enclosure - the blue capacitor and white resistor are the zobel section. I've written up the entire proceedure from start to beginning on another forum - http://forum.hifichoice.co.uk/viewtopic.php?t=6055 The result is very positive - I hear more that I did before and it sounds so much more natural. I also upgraded the cable wire - thick for bass and thin for treble which is much better Thanks again

17th July 2003, 01:59 AM	#8
Brett D. diyAudio Member Join Date: Apr 2003 Location: Greensburg, PA	What OEM speaker are those XO's out of? I was going to spend some money and upgrade my XO's (shown below) with AudioCap Theta's, Mills Resistors and Jantzen Foil Inductors but ultimately I just decided to leave them alone and build new speakers. I did rewire everything with 12Awg though.

17th July 2003, 12:24 PM	#10
octopus diyAudio Member Join Date: Jul 2003 Location: Darlington	"What OEM speaker are those XO's out of?" Eltax Linear Response 6.5 circa 1998, discontinued now. "Much more likely is is a bi-polar electrolytic, likely in the bass circuit." I think it is bi-polar, it has "BP" labelled on the side. The electrolytic capacitor I used for the zobel is also BP. For the second speaker I left out the black capacitor (10microfarad), will this effect the sound much? I haven't actually done some real listening yet.

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