RFI and EMI help A few months ago I moved from Raleigh, NC to São Paulo, Brasil. I was living at my grandmother's for a few moved and finally found an apartment on Avenida Paulista. Great location except for one MAJOR problem. Avenida Paulista sits along a ridge, making it one of the...

I've decided to put together a Quail Power cord group buy. The Quail Power Cord is the exact same power cord as the Iron Lung Jellyfish that is commonly available for $39 each. This is a 300% mark-up on the price direct from Quail electronics. For quantities 1-49 the price I was quoted is...

how important is it to shield speaker wires and maybe put a "drain wire"?

I have a Consonance Opera 2.0 turntable and PM-1 phono amp I have rewired the tonearm and shielded the cable with metal braiding.... however today i was playing a record and after it finished i noticed a radio station was being picked up and playing in the background.... i checked to see...

where can i buy cmoy pcbs? i want to buy like 5-10 of them to make as gifts to go with a pair of grado sr-60s.... i don't want to go through all the trouble of the breadboard if possible. if no one sells one, does anyone have a layout for one that accepts regular parts or smd parts? and...

if the k1000 has such high requirements compared to other headphones and it often is used with amplifiers used for speakers can i hook up my stereo poweramps to a k1000 safely? i have a Consonance Cyber 222 and Cyber 800 http://www.operaudio.com/products/cyber222.htm...

besides building a CMoy, what's the best head-amp for about $40..... i want to find a cheap head-amp that i can bundle with some SR-60s and give as a gift to some people

This has to be the most difficult DIY thing I've ever done with wire. 33 guage wire is so hard to work with..... Then when I thought I had it all done with and put together, the arm was binding and pulling to the outside of the disc. finally got it all fixed.... the noise floor is...

I'm interested in maybe embarking on DIYing some speakers. I currently have a commercial set of speakers that go down to 42Hz but I would love to have something that goes down to the 20-30Hz range with good soundstage and imaging... i know there are literally dozens and dozens of DIY...

What kind of stores carry techflex locally? i live in raleigh, NC which is a pretty big city.... i tried lowes, but they don't have it..... any suggestions? I'm also trying to find copper braiding to make cable shielding

A long time ago I had planned on making several Dynahis, but I graduated from college, my plans changed and I moved out of the country for 1.5 years. Now I am back and I still want at least one Dynahi for myself, but I simply don't have the time to finish building and casing what I started...

This Friday I should be receiving all my new Opera Audio equipment.... However, I do not have a cartridge for the turntable yet. Can anyone recommend an MM cartridge for the following turntable: http://www.opera-consonance.com/products/reflp20.htm This is the rest of the system...

hey guys... i haven't been around and i know this isnt hi-fi related but it is a DIY electronics problem i need help with i bought a 4 bay HD enclosure from cooldrives.com I bought the firewire icebox and moved to china today. I went to plug it in without switching the 110-220clip and...

ok... i got some problems with the PPA battery board if anyone can help me out... i have 18 AAA cells at 650mAh each R1 - 650ohms R2 - 5 ohms R3 - 120 ohms R4 - 120k ohms R5 - 8.2k ohms R6 - jumpered R7 - jumpered R8 open i hooked it up and C1 fried (looks black) and i know i...

I am moving to Handan City, Hebei province after the 24th of February and was wondering if any of the Chinese head-fiers on here happen to be from around that area?

i searched the forums and couldn't find a thread on this topic what alternatives are there to the locking cable mount Neutrik Jack? I was hoping vampire made one since I really like their 1/4" plug, but they don't

how did you all fit the PPA and battery board together in the same case..... i can't seem to figure out how they can both fit i don't have anything on the PPA higher than 25mm and i am using the AAA holders

exactly how much of an impact does making a PPA class A impact the battery life of the amp when used portably?

anyone know of any free software to do PCB layouts for OS X....

ok... i built my TEPS and it was working fine.... had an output of 31.5 V and i accidentally shorted the output and now the TEPS is not working anymore.... it is still reading 39V at test points 1 and 2 and it is reading 54V at Test Points 3 and 5 but at test points 4 and 5 it is 0V and the...

i got a LaRocco Dynobias and it is a different size than the regular diamond buffer module and doesn't seem to fit on my PPA i am building. the old module sat between C1 and the trimpots..... the dynobias doesn't seem to fit unless i was to remove the three trimpots and replace them with...

I want to make something like this: http://www.soundprofessionals.com/cg...item/ISI-RLM-1

QUESTION 1 i want to make a switch for my steps that would allow me to switch from 110V to 220V kind of like the switch on the back of computer PSUs i figure it needs to be a a relatively stiff switch that cannot be easily accidently moved. just to make sure i got this right... on the...

i think i've mentioned some of these artists before on here, but after recieving a new order of CDs from Ze Records i really think i need to make a thread about this label..... After first hearing the artist Cristina (Cristina Monet) on track two of Ladytron's "Softcore Jukebox" compilation...

I am trying to finalize some part numbers for the PPA and battery board and have some questions i haven't been able to find an answer to 1) For those of you who used the CRD with the ZNR diode, what part number did you order for the CRD and from where? 2) I have my battery board with 18...