Heads up - 19's for sale

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Originally Posted by rontec

Exactly....Maybe I should order resistors now too! :)

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Yes get them now they are like a couple dollars a piece.The resistors go in first,actually do the ground lug bypass first then the resistors and then the caps.The caps are a lot larger than the originals and will have a hard time getting them in as John is finding out.You really only need 250v but I used 400v as well, the originals are only 100v.

Can't wait to see another satisfied customer ;) :D

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Originally Posted by J Henry

Rontec,
You need 6, 8, 16 & 21 capacitors......1 of each total value.
I used 2 x 3 for the 6's, 4.7 & 3.3 for the 8's, 16 for the 16's & a 10 & an 11 for the 21.
These were all available from PE. I used 400V Solens.

This will make the biggest difference you can make to your 19's....way above all the other usual mods.

Now to get the new resistors...& I wish I had done this before as they are now buried underneath the new caps. Ah well....the things we do for old Altecs!!!

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Just one more question then, how are they wired into the circuit when you use two to create a specific value?

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Originally Posted by magnarc

Just one more question then, how are they wired into the circuit when you use two to create a specific value?

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Not sure whether you call this series or parallel, but you just solder one to the original connections & then just solder the other one to the same connections. That is, solder both the 2 smaller values to the same original connections to get the original larger value.....hope that's clear.

Yep that's clear, I sorta figured that would be the way.

I'd call that parallel....

Thanks!

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Originally Posted by Altec Best

IMHO it is preferable to keep the values as close as possible Example: Nobody makes a 21 uF so to keep the values close I would use a 10uF and an 11uF to reach 21uF instead of using a 20uF and a 1uF i think it is best to keep them (Values) close to one another.

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Many cap fanatics would disagree with the above. Use 1 big value and 1 or 2 smaller ones. Try to keep close to 10:1 ratio or better.

No idea if it makes a bit of difference, but it's what I generally do. Often cheaper and smaller that way, too. That's what I like about it.

[quote=Panomaniac;1832481]

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Many cap fanatics would disagree with the above.

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I think that line says it all.;)


I'm very happy with the result in 19 X-over upgrade.

One other thing John in my X-over upgrade I actually used a 12uF and a 9 uF to reach the 21 uF value.See this is what happens when you get someone else to build them for you.You can't remember crap !!! :D

Mine were built by member "Dgwojo" Dave did a fantastic job on them I might add.

I'm just the guy who paid for all the parts and labor and gratuities quite Happily I might add as well !!! :)

I'm probably giving away the ranch on this but Parts Connexion has Axon True Caps on sale, 50% off. They are made by the same Mfg. that makes the Solen film caps. I have used them in crossover networks and a DIY preamp. They worked well for me:Axon true Cap Good luck with the 19 upgrades!

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Originally Posted by Panomaniac

Many cap fanatics would disagree with the above. Use 1 big value and 1 or 2 smaller ones. Try to keep close to 10:1 ratio or better.

No idea if it makes a bit of difference, but it's what I generally do. Often cheaper and smaller that way, too. That's what I like about it.

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One other thing Pano I spoke to Dave today about it as he explained to me and said this is how it was explained to him by Madisound.

Madisound said they were against large differences in values,I think they claimed that it caused different signal paths which meant the signal wasn't getting through the caps at the same time.They also advised against small value bypass caps for the same reason.Dave said he has the email at work that he can retrieve for me from work this week coming up. :) I don't know but they sure sound good to me.(19 X-over)

Yeah, who knows? I've heard the exact same argument, but in favor of large differences. Go figure.

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Originally Posted by Altec Best

I think they claimed that it caused different signal paths which meant the signal wasn't getting through the caps at the same time.

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That's either a used car salesman talking or someone is simply having fun and pulling your leg. While I don't know the answer, my gut tells me two values as close together as possible would be the right way to go. In theory it shouldn't make one spit of difference. If you wish to have a water flow of 20 lites per minute it doesn't matter whether you have two 10 litre gates or one at 19 and one at 1. Neither water molecules nor electrons care, only the human pondering it does.