diyAudio

diyAudio http://www.diyaudio.com/forums/ A community dedicated to helping everyone learn the art of audio. Projects by fanatics, for fanatics! en Sun, 26 May 2013 08:09:29 GMT vBulletin 60 http://cdn1.dastatic.com/forums/images/diy/misc/rss.jpg diyAudio http://www.diyaudio.com/forums/ <![CDATA[For Sale:Large selection of audio IC's and other componenents for DIY]]> http://www.diyaudio.com/forums/vendors-bazaar/236600-sale-large-selection-audio-ics-other-componenents-diy.html Sun, 26 May 2013 06:29:59 GMT We have a large selection of integrated circuits from National Semiconductor,Burr Brown,TI,On semiconductor,Maxim and Analog devices.We stock the... We have a large selection of integrated circuits from National Semiconductor,Burr Brown,TI,On semiconductor,Maxim and Analog devices.We stock the latest generation of audio IC's as well as older devices like the OPA2134 and OPA2604.We carry these in dip package as well as soic.Also check out the newest parts from National semiconductor like the lm4562,lme49710,lme49720,lme49740,lme49860.
Also TI has the OPA1652,OPA1654,OPA1662 and OPA1664.All of these parts are the latest generation with ultra low noise and distortion.The specs on these are amazing.You can link directly from our store pages to the manufacturers data sheets.We also have bi-polar as well as other type capacitors.Check out our store at the link below.
integrated circuits, semiconductors items in magneticnorthelectronics store on eBay!

You can also contact us thru this forum, diyelectronics2012@gmail.com or thru the ebay email system with any questions,suggestions or make a request for parts we do not stock

We have a large selection of integrated circuits from National Semiconductor,Burr Brown,TI,On semiconductor,Maxim and Analog devices.We stock the latest generation of audio IC's as well as older devices like the OPA2134 and OPA2604.We carry these in dip package as well as soic.Also check out the newest parts from National semiconductor like the lm4562,lme49710,lme49720,lme49740,lme49860.
Also TI has the OPA1652,OPA1654,OPA1662 and OPA1664.All of these parts are the latest generation with ultra low noise and distortion.The specs on these are amazing.This week we are getting in some AD746 and AD827 so look for that around 5/29/13...You can link directly from our store pages to the manufacturers data sheets.We also have bi-polar as well as other type capacitors.Check out our store at the link below.
integrated circuits, semiconductors items in magneticnorthelectronics store on eBay!
You can also contact us thru this forum, diyelectronics2012@gmail.com or thru the ebay email system with any questions,suggestions or make a request for parts we do not stock ]]> diyelectronics2012 http://www.diyaudio.com/forums/vendors-bazaar/236600-sale-large-selection-audio-ics-other-componenents-diy.html Wanted! TOS 2SD844-Y http://www.diyaudio.com/forums/parts/236599-wanted-tos-2sd844-y.html Sun, 26 May 2013 05:51:30 GMT I will pay the price for authentic ones! Thanks a lot. I will pay the price for authentic ones! Thanks a lot. ]]> Parts jeepy http://www.diyaudio.com/forums/parts/236599-wanted-tos-2sd844-y.html LOOKING FOR OLD SCHOOL HI END AMPS THAT NEED REPAIR http://www.diyaudio.com/forums/swap-meet/236598-looking-old-school-hi-end-amps-need-repair.html Sun, 26 May 2013 05:40:59 GMT if YOU HAVE ANY OLD SCHOOL HIGH END Amps like fosgate, PPI. Lenier Power ,ADS Proton Old Soundstream they need to be made before the year 2000 oh... if YOU HAVE ANY OLD SCHOOL HIGH END Amps like fosgate, PPI. Lenier Power ,ADS Proton Old Soundstream they need to be made before the year 2000 oh yes Orion and US Amps . I will buy them from you at a reasonable price.

Kip 6013250464 ]]> Swap Meet Kip McGee http://www.diyaudio.com/forums/swap-meet/236598-looking-old-school-hi-end-amps-need-repair.html Orion 225 HCCA for sale http://www.diyaudio.com/forums/swap-meet/236597-orion-225-hcca-sale.html Sun, 26 May 2013 05:33:51 GMT I have a Orion 225 HCCA that has hardly been used .I bought it in the 1990s for about $600.00 I hooked it up on my test bench yesterday it runs... I have a Orion 225 HCCA that has hardly been used .I bought it in the 1990s for about $600.00
I hooked it up on my test bench yesterday it runs great. I want $250.00
For the amp I guarantee it to be in working order.
You can call me at 601 325 0464 if you may be interested
Thanks kip ]]> Swap Meet Kip McGee http://www.diyaudio.com/forums/swap-meet/236597-orion-225-hcca-sale.html Mosfet reg vs Mosfet shunt reg http://www.diyaudio.com/forums/power-supplies/236596-mosfet-reg-vs-mosfet-shunt-reg.html Sun, 26 May 2013 03:57:30 GMT Could someone offer an explanation of the differences, technical and real-world, between Mosfet regulators, such as these on eBay - High Speed LOW... Could someone offer an explanation of the differences, technical and real-world, between Mosfet regulators, such as these on eBay -
High Speed LOW Noise Mosfet Power Supply Regulator KIT | eBay
High Quality Mosfet DC Regulated Power Supply PCB | eBay

versus Mosfet shunt regulators, such as the Salas regs.

Technically, the eBay regs have no CCS front end, correct?
Is the CCS/shunt aspect the key to keeping noise as low as possible?
I'm particularly interested in a mains power supply solution for the SEN I/V converter, where power supply noise is critical.
Thanks ]]> Power Supplies linuxfan http://www.diyaudio.com/forums/power-supplies/236596-mosfet-reg-vs-mosfet-shunt-reg.html LD25X tweeter testing matched every driver http://www.diyaudio.com/forums/css/236595-ld25x-tweeter-testing-matched-every-driver.html Sun, 26 May 2013 03:02:36 GMT Image: http://farm9.staticflickr.com/8385/8621091786_0519ce37a8_z.jpg Spent a few days matching all the LD25X tweeters:D Now all the drivers are...

Spent a few days matching all the LD25X tweeters:D
Now all the drivers are matched pairs :D ]]> CSS RAW http://www.diyaudio.com/forums/css/236595-ld25x-tweeter-testing-matched-every-driver.html What is the advantage of a snubberized power supply http://www.diyaudio.com/forums/power-supplies/236594-what-advantage-snubberized-power-supply.html Sun, 26 May 2013 02:07:24 GMT What does a snubberized power supply do, and can I use something like this to get it - Sharp S202S12 Zip 4 SIP Type SSR with Snubber Circuit And... What does a snubberized power supply do, and can I use something like this to get it -

Sharp S202S12 Zip 4 SIP Type SSR with Snubber Circuit And | eBay

A snubber in the rectifier bridge ?

Thanks.
Srinath. ]]> Power Supplies srinath http://www.diyaudio.com/forums/power-supplies/236594-what-advantage-snubberized-power-supply.html Reversed adjust pin cap on LT1085 - damaged? http://www.diyaudio.com/forums/power-supplies/236593-reversed-adjust-pin-cap-lt1085-damaged.html Sun, 26 May 2013 01:51:01 GMT I'm building a Vicol Shigaclone (anyone interested can see the thread under Digital Source). The PS boards are built to support either a L7808 or LT1085/86 style regulator in a standard layout. I was building mine with a LT1085 and discovered only too late that the adjust pin cap (used to improve ripple rejection) was installed backwards. When I powered things up I noticed immediately the output voltage started at near the expected value, but then gradually started dropping.

It was only after pulling the power and going over the installation again that I found the reversed cap. I gave that one up as possibly damaged. I pulled it and replaced it with another (oriented correctly this time) and on power up things look nice and stable from a Vout POV - but I haven't scoped it yet. Would this cap reversal have damaged any aspect of operation for the regulator? ]]> Power Supplies tonyptony http://www.diyaudio.com/forums/power-supplies/236593-reversed-adjust-pin-cap-lt1085-damaged.html puzzled about Vas http://www.diyaudio.com/forums/multi-way/236592-puzzled-about-vas.html Sun, 26 May 2013 01:02:22 GMT Without giving it much thought, I've always assumed that Vas is directly proportional to Sd or surface area of the driver cone. Not!-

Vas = po*c^2*Cas

where
po= air density
c = speed of sound
Cas = acoustic compliance of driver suspension

I don't see Sd in that equation.

Another equation that I ran across is

Vas = (1.4 X 10^5)*Cms*Sd^2

but that is the same thing as

Cms = Cas/ Sd^2

So the equation is saying that Vas is directly proportional to the compliance of the driver's suspension (spider and surround) no matter what diameter size the driver is.

Am I missing something or is this something that isn't generally understood?

Sorry if you are more interested in the practical side, but I think that some of you like to discuss this kind of thing, at least I hope so.

-Pete ]]> Multi-Way cT equals piD http://www.diyaudio.com/forums/multi-way/236592-puzzled-about-vas.html FS: Adcom 5503 200 watt x 3 channel amp http://www.diyaudio.com/forums/swap-meet/236591-fs-adcom-5503-200-watt-x-3-channel-amp.html Sat, 25 May 2013 23:55:04 GMT Nice Beastly Adcom 5503 High current power amp. just removed from a home theater downsizing. three channels at 200 watts @ 8 ohms each. 350 watts @ 4... Nice Beastly Adcom 5503 High current power amp. just removed from a home theater downsizing. three channels at 200 watts @ 8 ohms each. 350 watts @ 4 ohms each, all channels driven.

On the bench, I got 287 watts into 8 ohms with just one channel driven so this thing is pretty beefy!

I would give it a 6 out of 10 for cosmetics. the top and face seem to be ok for the most part but the right side the installer slid along the cement and left some nasty looking scrapes on the heatsink and side. But if you put it in a rack or in a cabinet, no one would ever know!

This is going up on audiogon an eBay quickly! but DIY'ers get first shot so jump on it!!

$575 obo shipped within the USA

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]]> Swap Meet Zero Cool http://www.diyaudio.com/forums/swap-meet/236591-fs-adcom-5503-200-watt-x-3-channel-amp.html Suggestions for Live Audio DAC IC http://www.diyaudio.com/forums/digital-line-level/236590-suggestions-live-audio-dac-ic.html Sat, 25 May 2013 23:05:09 GMT Hi all -- long time lurker, first time poster. I am looking to design a DAC that will be used for live audio (along with an ADC shortly after). A... Hi all -- long time lurker, first time poster.

I am looking to design a DAC that will be used for live audio (along with an ADC shortly after). A friend of mine at my local hackerspace wants to do a project that does audio over gigabit ethernet on linux. I've offered to do the hardware side, because I'm interested in learning digital audio design. Maybe I'm a geek or just masochistic, but it seems like you guys have a lot of fun and I want in!

Anyway, I'm looking for some suggestions on what to pick. There are a lot of DACs to pick from, but clearly some are better than others for live audio. I'd think that some kind of low latency DAC is ideal for this application, but many DACs have ~32/fs filters which still seem pretty good if I can sample at 192k. Am I wrong to think that this would be the main concern for live audio applications? Are there other things I should be looking at?

I'm also a little concerned about kernel jitter and sampling at 192k... I think Ubuntu Studio 12 uses a "soft realtime" kernel, which might have a few microseconds of jitter.. this could effectively limit me to 96k sampling, probably doubling my filter latencies. I'm also not really looking for top-of-the-line right now, since this will be my first foray into audio design. I don't expect to be approaching the rated SNR of a 120dB chip any time soon. :)

Anyway, thanks for reading. Any advice is appreciated! ]]> Digital Line Level dleemiller http://www.diyaudio.com/forums/digital-line-level/236590-suggestions-live-audio-dac-ic.html PA AMP? http://www.diyaudio.com/forums/pa-systems/236589-pa-amp.html Sat, 25 May 2013 22:55:04 GMT Just picked this up and am wondering the best way to use it... is it just an xlr in, mini in and mini out with speaker? Seems like a pretty heavy... Just picked this up and am wondering the best way to use it... is it just an xlr in, mini in and mini out with speaker? Seems like a pretty heavy duty amp, am I right?

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]]> PA Systems cybr http://www.diyaudio.com/forums/pa-systems/236589-pa-amp.html FS- Elma 2x24 switches http://www.diyaudio.com/forums/swap-meet/236588-fs-elma-2x24-switches.html Sat, 25 May 2013 22:50:59 GMT hi folks, new to diyaudio but have been a member over at groupdiy for a while. Bought these for a project i never finished Selling 3 pairs of... hi folks, new to diyaudio but have been a member over at groupdiy for a while.

Bought these for a project i never finished

Selling 3 pairs of Elma 2x24 switches

ELMA 04-2130 -24pole-2 deck switches- NEW, never soldered

$110 includes shipping for a pair

thanks

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]]> Swap Meet DRGKDX http://www.diyaudio.com/forums/swap-meet/236588-fs-elma-2x24-switches.html Tubes4HiFi preamp questions http://www.diyaudio.com/forums/tubes-valves/236587-tubes4hifi-preamp-questions.html Sat, 25 May 2013 21:49:35 GMT As perhaps a few of you will notice I'm the guy that's asking about Akido preamps. I have a few questions about a preamp I already have.

Can some tell me if the preamp shown in this picture should sound and perform better than the second photo. The preamp section is the PCB to the left of course.

Here is the preamp I received. I was told the only differences between the two was supposed to be cost of the chassis and labor but you can obviously see it has a difference power supply and the caps on the board are different. I'm talking about the orange caps on both sides of the tubes as opposed to the black and white ones in the first photo.

I understand that from the photos you really perhaps can't tell their specs but I was hoping someone could tell just from maybe their appearance.

Again ...I'm curious if the components in the second photo would affect the sonic performance or quality of the preamp.

As soon as I get another job I do plan on buying and building an Akido preamp to use with the tube amp I already have that performs flawlessly.

Thank you...Blake ]]> Tubes / Valves Sprags http://www.diyaudio.com/forums/tubes-valves/236587-tubes4hifi-preamp-questions.html Amplifier SoundStream DTR1.900D http://www.diyaudio.com/forums/class-d/236585-amplifier-soundstream-dtr1-900d.html Sat, 25 May 2013 21:14:49 GMT Hi all, I do not know English well, surely you'll notice it xD, I have a Soundstream amplifier DTR1.900D, problems with supply to the area .. practically glows red, but does not pass on blue .. remains steady red ... all this after 6 mosfet power burst, the driver mosfet, and the toroid ... now replacing these components not part of the same .. the integrated TL494C, has 2 outputs, ranging pilot to control the finals, which the tester are 0V, then rightly does not turn on, because there is some problem ... but I can not identify which, the finals are new, the pilot end also, the TL494C also .. the toroid work, I noticed that the tl494c sends 5V to pin 16 via the 3 when tripping occurs, then disables the outputs .. maybe the problem is given by the pin 15, that instead of having 5V, it has 1.4. then recognizes it as a low signal and take the protection, but the pin 15, is connected to the 5V Ref, through a resistor, it seems everything is in order .. help! ]]> Class D davpet92 http://www.diyaudio.com/forums/class-d/236585-amplifier-soundstream-dtr1-900d.html