diyAudio http://www.diyaudio.com/forums/ A community dedicated to helping everyone learn the art of audio. Projects by fanatics, for fanatics! en Tue, 18 Jun 2013 07:24:58 GMT vBulletin 60 http://origin.dastatic.com/forums/images/diy/misc/rss.jpg diyAudio http://www.diyaudio.com/forums/ Soldering stations http://www.diyaudio.com/forums/equipment-tools/237815-soldering-stations.html Tue, 18 Jun 2013 06:38:28 GMT I've narrowed it down to Pace ST 50 w/ TD-100 and Weller WD1002. Which one would make economical sense in the long run? There's a bunch of accessories and replacements for both of them. ]]> Headfi Fanatic http://www.diyaudio.com/forums/equipment-tools/237815-soldering-stations.html effects powersupply http://www.diyaudio.com/forums/instruments-amps/237814-effects-powersupply.html Tue, 18 Jun 2013 05:45:07 GMT Currently I'm working on a design for a powersupply with multiple outputs to power a bunch of guitar effects. The output grounds have to be isolated from each other to prevent groundloops.

One solution is to use a transformer with separate secondary winding for every output.
But I was wondering if it is possible to create good ground isolation between the separate output circuits when using a shared transformer and rectifier.

Any tips would be highly appreciated. ]]> Instruments and Amps sevenup2278 http://www.diyaudio.com/forums/instruments-amps/237814-effects-powersupply.html re TB Subwoofer design, phase concerns http://www.diyaudio.com/forums/subwoofers/237813-re-tb-subwoofer-design-phase-concerns.html Tue, 18 Jun 2013 03:45:11 GMT Hello, I have a room with a raised floor in which I wish to use 3 sub woofer enclosures using the TB W5-11338. I have only a height of 155mm to play... Hello,
I have a room with a raised floor in which I wish to use 3 sub woofer enclosures using the TB W5-11338. I have only a height of 155mm to play with.
Each sub would have 4 x TB W5-1138 in a ported design.
Because of width restrictions on the front area, I cannot place all of the drivers in a straight line but can place them in a u shape with a port at the rear.
My concern is keeping all of the drivers in phase and with the port at the rear.
Each enclosure is approximately 48L with a tune of 37hz.

I normally use Leap but since upgrading to Windows 7, it doesn't work on it and I have not been able to test the design before I build it.
Can anyone see issues that I cannot see or if this design will work properly?

Or a better solution using different drivers? I could fit 3 LAT500 in there but I don't think they would have the same output as 12 TB's.

Thanks
Attached Images
File Type: jpg W5-1138.jpg (136.2 KB)
]]> Subwoofers Thims http://www.diyaudio.com/forums/subwoofers/237813-re-tb-subwoofer-design-phase-concerns.html Sealed MTM Crossover Question http://www.diyaudio.com/forums/multi-way/237812-sealed-mtm-crossover-question.html Tue, 18 Jun 2013 03:44:27 GMT I am planning a small mtm using hivi b3n and Dayton ND16FA
I have been exploring crossover options.
The enclosure will be 4' ceramic spheres for the b3n sealed and the nd16 mounted into the hardwood stand.

Some say run the b3n full range and just use a filter on tweeter.

Others have developed full blown crossover such as Lone Sagauro's Shtick which I know is for his enclosure.

Any thoughts or suggestions?
Attached Images
File Type: png mtm idea.png (8.9 KB)
File Type: png Shtick crossover b3n nd16fa.png (24.1 KB)
]]> Multi-Way Lefty78 http://www.diyaudio.com/forums/multi-way/237812-sealed-mtm-crossover-question.html Newb question about DIY speakers http://www.diyaudio.com/forums/multi-way/237811-newb-question-about-diy-speakers.html Tue, 18 Jun 2013 02:59:13 GMT Hello all. I'm a newb looking to get a little into a hi fi component build. My question is I'm looking at a DIY kit from Madisound for speakers or monitors or whatever the heck I'm supposed to call 'em. The kit I'm interested in is called B741 Scan Speak kit. Is anyone out there familiar with this kit and it's designated (suggested) speaker box or enclosure? I'd like to do this once and be done as to not waste money (penny wise, dollar foolish) so I'm hoping these don't suck. It looks to be somewhat expensive, yet cheap compared to high end speakers into the five or six digit arena (obviously). I'm not an audiophile but love good clean sound. I used to own Soundstream d-200's back in the day when I had car stereo's and they seemed pretty clean sounding to me. My budget was 3 to 4 G's for a whole system but my bro is giving me an upgraded Adcom Gfa-555 and a Akustyk passive preamp. This gift gives me the opportunity to spend more on the speakers and remain in budget (I know....... save the money!). I'd like to match it to some pretty good speakers (left and right). I will have to purchase a cd player as well. My room is 15.5' x 27' x 7.5'. It is also set up the wrong way (or I think it is), listening from the narrow direction and not longways. I found about a page worth of info on a search but wanted to ask directly. The Seas Excel kits also drew my gaze but I'm still unsure. Any input on this diy speaker choice compared to others in respect of my budget?? Any help appreciated.
Regards, John C. ]]> Multi-Way johnnycamp5 http://www.diyaudio.com/forums/multi-way/237811-newb-question-about-diy-speakers.html Show me your screen drive circuits http://www.diyaudio.com/forums/tubes-valves/237808-show-me-your-screen-drive-circuits.html Tue, 18 Jun 2013 02:33:35 GMT I'm tinkering with a few 6CB5s at medium to low voltage ~350V B+.

These sweeps are supposed to do very well using screen drive. Minus the Bernings, what are the better screen drive topologies out there?

Thanks,

Blair ]]> Tubes / Valves deicide67 http://www.diyaudio.com/forums/tubes-valves/237808-show-me-your-screen-drive-circuits.html Classe DR-8 Modded... http://www.diyaudio.com/forums/solid-state/237807-classe-dr-8-modded.html Tue, 18 Jun 2013 02:32:09 GMT Hi all,

Just got a Classe DR-8 that has me wondering....

First problem is that the amp's power switch doesn't do anything. When I plug the amp in, it turns on (relays click) and the amp plays. To turn it off, I have to unplug it.

So, I popped the top and looked around. Well, there's a single red wire that isn't attached to anything and the end is covered in electrical tape. It runs from the small PCB at the back of the amp right next to the IEC jack. So that's unusual.

That PCB has 3 red LEDs on it that do not come on. I don't know if that is good or bad...

The binding posts were replaced with nice hardware, but looking at another picture here (http://www.diyaudio.com/forums/solid...-topology.html), the cap and resistor across each channel are not present.

I found the service manual on the Classe website and it has a schematic but it's not complete. Does anyone know what the values of the cap and resistor are that are across the output?

So, I think my power switch might be bad (or my switch isn't properly wired)and I'm missing the RC filter on the output.

Does anyone know how this beast is supposed to look on the inside??? This is what mine looks like....
Attached Images
File Type: jpg IMG_0362.jpg (981.4 KB)
]]> Solid State willie-aspen http://www.diyaudio.com/forums/solid-state/237807-classe-dr-8-modded.html Super regulator and cable length http://www.diyaudio.com/forums/power-supplies/237806-super-regulator-cable-length.html Tue, 18 Jun 2013 01:52:57 GMT I have two of Per Anders' SSR01 super regs ready to supply power to parts of my Shiga clone. The SSR01s themselves will be situated as close as possible to the target portions of the circuit. But I was wondering about the length of the cabling from the linear feeder regulators to the SSR01s' input.

Each linear has its own transformer, so I was thinking on the one hand it might be a good idea to get that part of the supply into a separate enclosure and feed the output of the linears into the box housing the SSR01s. But that would result in pretty long cables between linears and super regs. Wasn't sure if that was not a good thing to do - excessive inductance etc. Advice appreciated. ]]> Power Supplies tonyptony http://www.diyaudio.com/forums/power-supplies/237806-super-regulator-cable-length.html Class D. How to Design up 2000W/channel? Pls explain to me.. http://www.diyaudio.com/forums/parts/237805-class-d-how-design-up-2000w-channel-pls-explain-me.html Tue, 18 Jun 2013 01:49:38 GMT Dear all. I wonder that why is the PA power amplifier can be 2000W/channel.? Could you show me detail about this problem. Tks all.! Dear all.
I wonder that why is the PA power amplifier can be 2000W/channel.?
Could you show me detail about this problem.
Tks all.! ]]> Parts KORAH http://www.diyaudio.com/forums/parts/237805-class-d-how-design-up-2000w-channel-pls-explain-me.html Read this if you are over 25 http://www.diyaudio.com/forums/lounge/237804-read-if-you-over-25-a.html Tue, 18 Jun 2013 01:15:35 GMT ...]]> Sad...Sad...Sad...I LOVE THESE Games like crazy..... Kids today have NO CLUE what good is!


Page 1 > http://web.archive.org/web/200311082...1338730,00.asp

Page 2 > http://web.archive.org/web/200311080...1343650,00.asp

Page 3 > http://web.archive.org/web/200311080...1343744,00.asp ]]> The Lounge Dude111 http://www.diyaudio.com/forums/lounge/237804-read-if-you-over-25-a.html Passive led vu meter! http://www.diyaudio.com/forums/equipment-tools/237803-passive-led-vu-meter.html Tue, 18 Jun 2013 00:21:45 GMT Has anybody build this passive led vu meter? I have been "inactive" in electronics for a while now, I need to fix or build something....I was considering to build this "passive" led vu meter, But again I will have to check if this circuit will affect the impedance seen by the amp at high volume. Six-LED Bar Power Indicator - RED - Page102 ]]> lanchile http://www.diyaudio.com/forums/equipment-tools/237803-passive-led-vu-meter.html Potting Compounds http://www.diyaudio.com/forums/tubes-valves/237802-potting-compounds.html Mon, 17 Jun 2013 23:34:30 GMT Anyone used JB Weld or other epoxy for small potting with exposed wires? I am making a couple of 5U4 solid state test replacement that fit into... Anyone used JB Weld or other epoxy for small potting with exposed wires?

I am making a couple of 5U4 solid state test replacement that fit into the octal socket and before getting a bunch of potting compound anyone use the like of JBWeld for encapsulation of the diodes in an octal socket?

Just not sure if the dried automotive style epoxy is OK for HV use?

Thanks

Sandy ]]> Tubes / Valves SandyG http://www.diyaudio.com/forums/tubes-valves/237802-potting-compounds.html 30 year audiophile signing on http://www.diyaudio.com/forums/introductions/237801-30-year-audiophile-signing.html Mon, 17 Jun 2013 23:05:46 GMT Hi DiyAudio users. I'm a 30 year audiophile and CNC machinist/programmer that has been building loudspeakers since I was around 12. I'm looking forward to many years here at DiyAudio.
:cheers:
Steve ]]> Introductions AmpUtator http://www.diyaudio.com/forums/introductions/237801-30-year-audiophile-signing.html Audio Precision for speaker measurements? http://www.diyaudio.com/forums/equipment-tools/237800-audio-precision-speaker-measurements.html Mon, 17 Jun 2013 21:33:56 GMT Hello all! I just bought myself an Audio Precision System One Dual Domain with the PCI computer interface card with interconnecting cable and got... Hello all!

I just bought myself an Audio Precision System One Dual Domain with the PCI computer interface card with interconnecting cable and got it running. This is the DSP version. Traded in my HP 8903A and some other instruments.

I started using it and found that it has a MLS Acoustic procedure, which is great! But it seems very basic. I have not found out if there is a way to do a MLSSA style cumulative spectral delay plot. Does anyone know how to do this? I imagine it could be done with some programming. Writing a script to move the start time forward in steps and making a 3D graph from that, but I don't know if the scripting environment supports 3D graphs. But I don't want spend more time programming in Basic than it would take me to write something from scratch in a real language. :D

I was also looking to do a anti-RIAA EQ to measure a phono stage. But it seems all very DIY and requiring a lot of programming in Basic to get anything done.

Perhaps there is a treasure trove out there with already programmed procedures?

Also I have read about a low noise mod - I am guessing it involves using some higher quality op-amps. Or is it something else? Any hard info on this?

Any pointers eagerly accepted!

Best regards,

P ]]> Peter Braroe http://www.diyaudio.com/forums/equipment-tools/237800-audio-precision-speaker-measurements.html Will those two inductors offer the same result? http://www.diyaudio.com/forums/parts/237799-will-those-two-inductors-offer-same-result.html Mon, 17 Jun 2013 21:25:51 GMT Hello, I recently burned an inductor in the crossover section from one of my KEF speakers. I measured/compared it with an LCR meter and other... Hello,
I recently burned an inductor in the crossover section from one of my KEF speakers. I measured/compared it with an LCR meter and other similar inductor from the working speaker, and they measured different. Then, I swap solder them and the problem swaped too, so the problem was hunted down to be the inductor.

The inductor actually looks like the one in picture 1 (iron core), while I have seen this other one as a proper substitute. Picture 2 is the Jantzen one I am planning to put in place. Will it affect in any bad way to be air core instead of iron core, keeping inductance and DC resistance the same?
Wire gauge is even thicker, so there should be no problem regarding that.
Attached Images
File Type: jpg picture 1.jpg (13.0 KB)
File Type: jpg 18AWG 1_0mH coil 1239.jpg (70.0 KB)
]]> Parts regiregi22 http://www.diyaudio.com/forums/parts/237799-will-those-two-inductors-offer-same-result.html