livewire
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Posts posted by livewire
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Thanks Reks, thanks grawk!
I'm looking into it, seems like just what I need.
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Airplay?
Please excuse my ignorance but,
How would this get pumped into my USB/optical DAC?
Would I need some type of wireless adapter or
<cringe> need to buy an Airplay enabled DAC? (if they even exist)
I've seen Airplay enabled speaker setups and a few Sony and Denon amps that support this.
I'm also seeking something that outputs music at least on par with flac files.
Or is the realistic alternative a MacBook with optical out or a PC server like I have now?
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Does anyone have the inside scoop on if the iPad 2 will be a decent streaming music server?
Using what interface?
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They are Headamp boards, maybe Justin or one those
who have bought these boards from him could answer that.
Once upon a time I tried to procure these, but never received an answer to my request.
Gee, how odd...
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Green solder mask over black pcb substrate maybe?
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Got any pix of the underside(s)?
Gerbers would be better!
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Happy Happy Birfday to one of my favorite DIY'ers!
Think I'll hoist one in yer honor.
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m c escher would be proud.
Love the alien(s)pic!
I think I found my new desktop background.
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That's what I am attempting to do.
Then it might give you a good reason to go to our nascent meet
and make the two hour drive down from LaLaLand.
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You guys need to get your feet wet and build something. There are plenty of cost effective, easy to implement, and surprisingly effective DIY designs out there if you dig a little. Make a ton of mistakes, go through a learning curve, and get something successful under your belt before attempting anything as complex as the T2. Got to learn how to crawl before you can run. Consider it the start of a journey.
I aint no engineer.
My abilities fall under the "tech" level.
I built a MSSH. No problems. It works wonderful.
Admittedly a beginner's project.
I am now tackling a KGSSHV.
Due to a couple of fuck-ups i am going through DIY hell.
I am making a ton of mistakes. Aint done with the learning curve yet.
No T2 for me, thanks.
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It's back to Mouser again.
I think I need another 2SC4686A...
I'm ordering a box-full of them as insurance.
(the amp boards have a boatload of them too...)
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Actually, what I would really like is a T2 for dummies...if that's even possible.
Me too!
From what I see, you better have all of your technical ducks in a row
if you gonna attempt that build. Definitely not a beginner DIY project.
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(long version)
About a month ago while testing I slipped with the probe
and shorted the two pass regulators. (fqpf8n80c)
They were toasted along with the 10m90s and 2SC4686A sand
in the positive rail. The 24 volt zener popped too.
I had replaced them all yesterday and started to test again today.
After noting the bar graph on my Fluke shooting past 600 volts
and blanking the display, I shut it down.
I went back to cold comparitive testing using the resistance scale.
It was then noted that one of the devices that I had changed was
shorted. (the 10m90s) The new one on the negative rail had an in-circuit
reading of ~3K ohms between the gate and the other terminals,
the new one on the positive rail was ~28 ohms.
So, I guess it was a bad part or that the soldering did a number on it.
This time around I bought extra sand.
I replaced it a second time and everything is now working fine again on the +450VDC side.
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Yippee!
I got the +450VDC psu rail working again.
No more over-voltage issues to deal with.
Now with one side good, I can revert to comparitive live testing
between the good side and the bad side.
Hopefully, I'll get the negative rail back up soon.
That is if another parts order to Mouser isnt necessary.
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Got the repair parts in from Mouser, so troubleshooting the psu continues.
Things still aint right, the negative 450 volt rail is still outputting only 15 volts.
The positive rail which was completely dead, now has voltage, but it is off the charts.
(at least as far as my 600 volt limited Fluke DMM is concerned.)
This much higher than normal voltage is also backfeeding into the filter capacitors.
o_O! That's not good!
I am not able to read it, so I guess it is time to dust off my old Simpson 260
that is in storage in the garage, which is capable of reading up to 1000 volts.
The only (high) voltage that is still normal on the psu board is the 580 volt bias output.
At least I didnt blow that up. The 15 volt supply is also working again.
What would be nice would be knowing some nominal testpoint voltages so I could test for those.
I'm too stupid to figure out what the base/gate voltages should be that are fed in from the
rather complex (to me) sub-circuits. (such as the "battery" circuit)
Blub, blub, blub. (i'm trying to tread water here!)
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I got a bad case of Shpongleitis
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Lenovo Y560 Notebook.
It has optical out, gonna see how it fares as a music server.
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No I didnt call them. I guess I could, got nothing more to lose.
Mouser does have a disclaimer on their website trying to discourage
customers from using the USPS for their shipments due to this type of crap.
I wish that they would use "signature confirmation" instead of the "delivery confirmation" option.
With the former, they must deliver it to someone and have them sign.
With the latter method any mailman can misdeliver it and sign off on it.
(what I suspect happened here - my mailman is a demented old puke)
UPS or Fedex aint much better, if I'm not home they will leave the parcel on my doorstep
in plain view of any dirtbag walking by on the street, ripe for the pickin.
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Well this really sucks and blows.
It seems the Post Office has lost my Mouser repair parts order.
It had a tracking number, they say that they delivered it.
It sure wasnt delivered to my address unless there is someone
in the neighborhood stealing packages out of mailboxes.
Am gonna place another duplicate order, this time shipped using another carrier.
We'll see. Wait, wait, wait.
Just curious. There are at least four other people out there with kgsshv board sets.
It would be nice to hear of your progress in building this thing.
Seems that I am going nowhere fast, maybe someday I'll hear music from it.
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10,000 Maniacs - "What's The Matter Here?"
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I can't claim that long bush idea was mine - Inu tracked those down as part of his T2 build. He used plastic screws as well, but the fact that the bush goes almost all the way through the alumina insulator means that steel fasteners work perfectly.
Only thing to watch is that although the outer diameter of the bush *should* fit in a TO220 hole, tolerance stack up sometimes means that it is a very tight interference fit. Feel the force, kgsshv buider, feel the force. Believe it will go in and it will.
They are going in alright, my dremel with a drill rasp saw to that.
The interference fit was a bit too tight, no problem chasing the TO-220 mounting holes
about ~.002" with a dremel. The extended length shoulder washers* plopped right in the last time around.
*Mouser p/n: 532-7721-3PPS
Gonna do it again this time, using the ceramic oxide tombstones as Nattonrice suggested.
Mouser does not carry the all plastic fqpf80n80c sand. (26 week lead time)
So I'll be using the TO-220 sand I have with the exposed metal mounting tab.
I've never used future electronics, Mouser is my friend.
Apple Tablet
in GoRedwings19's Computer Help Hotline
Posted
Monkey, I'm not sure that I understand "73", but thanks anyway.
blessingx thanks for your input as well.
Your mention of quality and bit perfect has me wondering.
Might there be delays or drop-outs on this type of device versus a caable connection?
Here again, I'm a total apple n00b so exscuze my estupidness.