Author Topic: Legato "Lite" is happening!  (Read 3222 times)

Offline AR-T

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Legato "Lite" is happening!
« on: April 05, 2019, 12:05:50 AM »
Yes, we are making a smaller, lighter version of the Legato. Mainly for the export market, as shipping costs of that last thing we made was a disaster. Of course, you don't have to live somewhere where the gubbament gouges everyone with import taxes.

More details later (as usual), but here is a photo of what it will look like.



(Yeah, maybe the photo could be better, but guess who did it!) (If CSB #2 was here, we could get here to do it. She has turned into a decent photographer, but if you saw the expensive cameras she gets to work with, even I could do a halfway decent job.)
« Last Edit: June 27, 2019, 12:08:32 AM by AR-T »

Offline AR-T

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Re: Legato "Lite" is happening!
« Reply #1 on: April 05, 2019, 12:31:17 AM »
Ok, now that you have seen a photo of it, most of the changes should be obvious.

Powered by a SMPS wall wart. Trying to keep the cost down. (Making linear PSUs is getting to be a pain. Especially wrt getting the parts we would like to use.)

Everything is about 1/2 of the Legato: half as tall, half as deep, half as wide.

Half as expensive.

With no compromise to what goes inside.

Yes, it is essentially a Legato, scaled down, with the only big change is the power source. Same clocks, and same performance level. (Ok, someone may get one that is 2 dB or so from what the big Legato would be. Maybe. Still better than anything under a few grand.)

The first run does not have a "test spigot" for the clock, and we have already found that to be a problem. So, starting with Build #2, there will be one. Not that it matters to any of you, but it takes some of the guess work out of how we do the final test, to assure it meets our level of performance.

And, as always, it comes with the free BNC cable (aka, The U-Byte 1). Unless you would like to buy a U-Byte 2, at a $50 discount. (Only valid if you buy them together, at the same time.) (And if you do not need a cable, please let us know. Thanks.)

Also, since it does not use the USB power pin, we can also offer a USB cable, if you desire one.  No promises on how much better it will sound, compared to what you are now using, but we found that pretty much any cable sounds better, when the power pin is not connected.

"Does this mean you learned your lesson, from that silly Legato II?"

Well, the problem with that was everyone killed the batteries. And yes, some folks felt that using the power pin mucked things up. Even though all it did was to tell a NMOS to turn on, which in turn turned on something else that turned on the Legato. (Some may recall we made that because the above mention of "how hard it is to make a linear PSU" rant.)

Anyway, since some folks would like to have a system that has cables that we "designed", we can now offer the USB one, at a nominal price. (I forget how much we charged. It wasn't all that much. Mostly to cover the cost of parts and some time to make one.) So, if you want one, let us know, and we will figure out a price that is fair to both of us. (Translation: we see no reason to try  to get rich, selling cables, because....................they are all just wire. Wire that we have to buy. And put connectors on. Outside of the U-Byte 2, the wire is not expensive.) (Yes, cables can be a high-margin sale, but I guess we are just too stupid to be willing to gouge folks for a piece of wire. The others can do that.)

Stay tuned for further developments!

Offline AR-T

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Re: Legato "Lite" is happening!
« Reply #2 on: April 14, 2019, 03:14:14 PM »
Here are some interesting plots.

The brave soul who has purchased the first one of the line decided to also  try one of our fancy cables. Here is what its return loss looks like:



And when you hook the cable up to it:



So, to translate....................

The cable is definitely 75 ohms. The dip, between 50 & 60 MHz is normal. Cables have a "comb filter" effect, on return loss. (Trust me, ok?) So, that is normal.

As you can see, once we connect the Lite, the return loss doesn't change much. Which means it is easily better than 30 dB. (Most units struggle to achieve a return loss of 20 dB.) To put it another way: we have previously (back in the 90s) concluded there is a certain level of return loss that needs to be reached in order for things to "sound right". We are well below that level. (Maybe I should put one of those silly smiley things here. I see where they have not been disabled here.................................hmmm.................need to look into that.)