Quote: Very nice! Where did you get that case? Is it from vt4c? Was the front completely blank when you got it?  

I designed and made this PGA2310 module. It uses an Arduino to control it :) Some details here: http://nospecifictopic.blogspot.com/2011/01/controlling-pga2310-with-arduino.html    

Wow excellent results for your first PCB! I've had the drilling problem before too. You can make the pads larger so that there is less chance of lifting the trace but if you want to make an SMD version, look for the SOT-223 packaged LM317:     The schematic would be the same, just...

With a simple regulator design it might be easier and cheaper to just get one off eBay?   http://cgi.ebay.co.uk/LM317-DC-5-24V-Out-2-5-12V-Volt-Regulator-Converter-/230586703745?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item35b009df81#ht_6415wt_957    ...

Quote: Yep it all works, I'm just waiting to finish some case work. Yes I have PCBs if you would like some or parts, just PM me. I ordered the boards from seeedstudio.  

Quote:   Thanks for the reply jcx.   Well its a line stage so the load would be small compared to headphones, like 10-50k, that of a power amp.   Can you show me a schematic or a link to a "ring of two bjt feedback ccs" example?

Hi, I'm designing an LME49860 based linestage which I'd like to biased in to class A. I think I'll use the cascode JFET method, ala the PPA. I just want to be sure I've selected the right transistors for Q1 and Q2. I want to use SMD components, I've read Tangents documentation and think...

Well for what its worth here is my design, still waiting for some DIP switches to arrive (for setting the I2C addresses) but I've tested it and it works really well! I'll have a few spare PCBs if anyone is interested.        

Sorry to bump an old thread but did anything become of this? Just curious as I've designed pretty much the same thing, got PCBs and just waiting for some components to test it out....I'll use an Arduino too.

Aahh, cheers for the link, some interesting discussion.

I searched and found nothing! National is really talking it up: http://www.national.com/pf/LM/LM4562.html Easily drives 600 loads Optimized for superior audio signal fidelity Output short circuit protection PSRR and CMRR exceed 120dB (typ) THD+N of 0.00003% I'm waiting for mine to...

Quote: Originally Posted by GregVDS I posted some pics of my M³ and STEPS finished in the M³ discussion on Headwize DIY workshop. Here my files are too large, sorry. Go there, and give me your comments, Sorry about the pics quality, poor camera, poor photograph, poor resolution...

Quote: Originally Posted by grasshpr I was worried whether I could get an alps pot in that thing, but luckily it worked out! Anyway, I'm looking for a nice 9V battery holder for this build. Anybody have suggestions?

Great work Nisbeth You should put some clear coating on the copper if you havn't already as it will tarnish very quickly

Quote: Originally Posted by dsavitsk What's going on with the USB connection? Did they just place it there for the picture, or is the end of a UBB cord really just soldered to the board? It has a male plug that is attached to the PCB....still seems silly though: I...

I dont suppose anyone has tried this yet? I am thinking of buying a kit but cant find any oppinions on it. http://www.audioworkshop.com.hk/report/d3/d3.html

I finished my Multi-Hybrid. See here for the design: http://www.headphoneamp.co.kr/bbs/zb...sijosae&no=217 I designed my own PCB, used Panasonic FC caps bypassed with 100nF caps, 1% matched resistors, Alpha pot, IRF610s and a 6922 tube lit with a UV LED. I got it into the same hammond case my...

Quote: Originally Posted by James281 how did you guys wire the 2 led under the tubes? i plan to wire them like this, will this work?? on the pcb i don't know which side is positive for the led i guess i will have to try to figure this out. I'm not sure what voltage this...

I tried it and got a high pitch whine with my PIMETA. I'd say dont bother.

Good job Blooze. Thats an LED an a half innit?

hmmmmm, looking at my own pics....maybe I could salvage the BB PCM1702's and all those beautiful Elna duorex caps and make a more simple DAC?

Quote: Originally Posted by MisterX PICS! We want pics of busted stuff! Seriously when you have a soldering iron nothing is ever busted for long. Hehe. Well I had a fiddle but no luck. It makes a kind of eratic hiss/crackle now....and I kind of demolished the original...

Thanks for your help people but ummm nevermind.....I think I broke the DAC. You live and you learn

I am wanting to swap the dual opamps in my Nakamichi DAC (NEC 4572's) which are single supply for OPA2132s which are dual supply opamps and I was wondering if I could do it as pictured with a TLE2426......I have tried to work this out in my head but the different grounds confuses my somewhat...

Quote: Originally Posted by pho_boi Hey all!! my first time posting on this thread well this is my multi-hybrid tube amp using the 6922 tube. powering it is a regulated 24v regulated supply from a 7824 regulator and some capacitors. At max volume and nothing playing there is a...