Are these Caps or Resistors?

[octopus]

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.]

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]

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]

Thanks very much guys.

 

[LaMa]

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]

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]

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?

An externally hosted image should be here but it was not working when we last tested it.

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

An externally hosted image should be here but it was not working when we last tested it.

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.]

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.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

 

[planet10]

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]

"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.

An externally hosted image should be here but it was not working when we last tested it.

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.