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  1. Replies
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    So then, this should be correct orientation for...

    So then, this should be correct orientation for tapping the inductor at 10%?

    I've got a set of 604E that I need networks for and I used a coil winding calculator to design the needed coils.
    ...
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    That's my living room...

    Those were assembled using cabinets from a pair of 811A that I stumbled across. These are headed to a new analog studio outside of Nashville.

    Meanwhile the ferrite 604 8K/801AA duplex drivers have...
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    I got Lucky… Not too deep of a rabbit hole. ...

    I got Lucky… Not too deep of a rabbit hole.

    The Gauss 4583A T/S are pretty similar to the TAD 1601B except the Qms is quite a bit lower on the Gauss. I’m not sure how that would affect the...
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    Do you know where I could find a copy of that? ...

    Do you know where I could find a copy of that?

    eso
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    These things? 8843888439 Nothing else I've...

    These things?

    8843888439

    Nothing else I've ever heard compares to them, except the 3 other sets like this I know of.

    I've also got this thing for rebuilding old Urei monitors and making...
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    That is a handy little calculator. Off hand do...

    That is a handy little calculator.

    Off hand do you know the slopes used in the big JBL Monitors?

    eso
  7. Replies
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    Guesstimating 2-way crossover circuit...

    I need help from the brain trust here. I've combed the internet, searched the archives here and made some phone calls all without finding what I think I'm looking for.

    In the course of my work...
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    3,204

    I built a charge coupled version of Steve...

    I built a charge coupled version of Steve Schell's crossover for the 3-way Cogent system. I can say definitively that it has not degraded the sound in the least, and in fact tend to sound more...
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    I've been pondering building a 4350/55 TM-3 type...

    I've been pondering building a 4350/55 TM-3 type clone, adding a 10" mid bass and tweeter...

    Not that I need such a thing. The originals look to have always been a 2-way and the horns are oak, So...
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    The drivers appear to be in excellent condition....

    The drivers appear to be in excellent condition. I don't have any other photos of the Gauss, but these...

    eso
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    Interesting reading through this whole thread. ...

    Interesting reading through this whole thread.

    I stumbled across these and am working on saving them from the wrecking ball. With the pot gone from the baffles I'm thinking these converted to...
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    Edgewound is Upland Loudspeaker Service, isn't...

    Edgewound is Upland Loudspeaker Service, isn't he? We're connected on FB, so I sent him a message asking...

    Thanks,
    eso
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    LE-10a motor recone as midbass?

    Question for the driver experts here.

    Can LE 10A motors recone as 10" midbass like a 2122?

    Thanks

    eso
  14. Replies
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    Further Charge Coupling question: has anyone...

    Further Charge Coupling question: has anyone tried a mismatched series of caps to get a capacitance value in between standard values?

    I.E. on a tweeter 1uF is a standard, so in charge coupling we...
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    The 801A used an Altec 604 8G and had the...

    The 801A used an Altec 604 8G and had the original blue Urei radial horn, not the Mantaray.

    The mantaray horn was introduced on the 604 8K which was the platform for the 801AA, hence the tiny...
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    It's slightly confusing, but the original version...

    It's slightly confusing, but the original version of the Urei duplex was based on a 604 8G driver and was called an 801A. It was used in the 811, 813 & 815 monitors.

    The 811A, 813A and 815A...
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    I'm surprised no one here has any input. ...

    I'm surprised no one here has any input.

    Having these 801AA duplexes to study has raised more questions than they have answered.

    I can certainly clone this horn and mounting in my wood horns,...
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    Done, Thank you!

    Done, Thank you!
  19. Replies
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    Updating profile issues

    The forum platform does not seem to be allowing me to update my signature line. That system is out-of-date and I'de like to revise it, but I can't seem to find a way to do that.

    Anyone have...
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    Altec 604 8G and 604 8K throat sizes.

    It's been a while since I've been here, but I need help from some of the brains here.

    For many years I've been playing with and building Urei 801B duplex drivers and custom horns. The parts are...
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    Thanks, that is implied, but why not just draw it...

    Thanks, that is implied, but why not just draw it into the schematic?

    So like this? Or doI just need one battery charging both the mid and high filters?
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    Old thread, but it seems like I could get the...

    Old thread, but it seems like I could get the answer here.

    All of the schematics I see show the point where the 9V is applied between the caps, but where does the other end of the battery land?
    ...
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    Ha! I just came across this photo linked in the...

    Ha! I just came across this photo linked in the Chilean Audio forum.

    I made the pair of Yuichi's with the Burgundy mouth stripe. Are those Ricks? I sold them on Ebay years ago as a part of some...
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    The C series is tricky because Harmon completely...

    The C series is tricky because Harmon completely redesigned the crossovers with the Tapped inductors making them very hard to replicate.

    To stay passive and time align might require modifying the...
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    I haven't posted here in ages. I built a new pair...

    I haven't posted here in ages. I built a new pair of 840 crossovers at the beginning of the year. The parts count is very high, and as a result the cost is too. But they were worth the effort. Prior...
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