I need to proto a opamp buffer but never bought a proto board in my life (well i had the radio shack ones that lifted pads).  Any recommendations for strip boards (i think thats what  solder style are called) for mounting a dip socket and some regulators with caps?

Should i even worry about them? Low-Pass Filters High-Pass Filters Input Capacitors for Headphone Amps Most of the time here we use input/output cap values that have cut off frequencies well above or below the human hearing range (2hz and 100khz for example) to reduce phase...

Anyone have a circuit for converting stereo to mono for a small desk radio amp? Only requirements are its passive and only costs a few bucks from mouser or digikey. Just twisting the left and right together doesnt sound like a good idea

Ive noticed alot of new style volume attenuators out there and kinda wanted to make a discussion on the pro's/con's of each. Heres my quicky list. 1. AMB δ1 The δ1 relay-based R-2R stereo attenuator 2. Gold Point stepped attenuators Prices 3. DACT DACT audio attenuators 4. The ebay...

Im venturing into power amps and had an idea for the shop. My original intention was to build a 2-3 watt tube amp for my desk speaker. However i already have a mini3/gamma2 combo box at the shop. I was thinking if i could some how build a power buffer (unity gain) to supply current it would...

So I saw this while looking for other things. LM4780 Olympic Edition Amplifier Kit [LM4780TDA] - $99.00 : hifidiy.net I know that the tube is a china junk and was wondering what to replace it with. Also does anyone know what powers it? It seems to have +-18v and +-25v in.

Ok i have a old 1960's analog meter that i want to use. it is a 20ua unit with a dc coil of 1.5k. Since i just want eye candy i wanted to hook it up before the pot so i could tune it for full output at the dacs full output. By my calc thats 30mv in if im assuming i just need 20ua into a 1.5k...

Is there a simple way to limit inrush current without resorting to 10-20 components on a protoboard? Lets say i wanted to limit inrush power to 300 watts. at 120vac i would need a 48ohm thermistor thats rated at 2.5 amps correct? I could then bypass the mains with a relay. I could put the...

Ok i would like some eye candy for my next case. I have an old school mil spec meter thats 20ua. What I would like to do is have a simple circuit that progressively dampen the response as the signal gets louder. aka first half of the dial represents 20mw, then the 2nd half might represent 200mw...

So i inherited a huge transformer from an amp. the problem is i have no idea on how to ohm it out to find primaries and secondaries. It just has 5 wires coming out of it. I assume that means 1 set of secondaries with a center tap?

Does such an animal exist? I just want tube sound from my normal amp. I really dont want caps in the audio path. Most of the tube buffers ive seen are high gain. I just wanted unity gain tube buffer to plug in line before my preamp. So far i havent found a tube preamp that i like that doesnt...

Due to size constraints i cant fit a large enough transformer in my case. However i can fit 2 smaller transformers in the case to get the needed va. Would it be a problem to parallel 2 transformers and stack them either side my side or on top of each other for a single voltage source?

Are there any reasonable alum cases out there other then hammond that i can buy on the internet? Once the project needs like a 6x6x6 box or bigger the options are limited if you dont want it to look like a pull box.

I gotta case i want to use, but it has metal end panels. Im having a hard time finding decent banana binding posts and rca connectors that are isolated, that dont cost $40 shipped for 2 pair. It seems your choices are cheap plastic nut posts, or ubber expensive ones. If no one knows of a good...

Title says it all. I have 4 large bookshelf speakers, dedicated sub, and onkyo 696 receiver for a pc setup. This is abit much so i would like to switch to cans. Right now i have some grado 60's (very clear, no bass) and some maudio Q40's (nice over all, closed though) a mini3 amp, and various...

Im going to start my recable using the ebay special 24 gauge 19 strand stuff. I was wondering how to make the cable since its 4 wires and no jacket. Should I do 2 twisted pair, then twisted together. Should i do 4 wires and the electric drill twist method. Should i try my hand at braiding(I sux...

Im looking for a 12-14v 3amp min power supply for a power amp, but it seems they are all switching types. is there a cheap way to denoise these? When amb usb stuff gets power, they use beads and a cap, could i do something similar? Or maybe get a 14v supply and make a 12v regulator out of...

Ok so the old lady has this horrible horrible mono speaker thingy that is the size of a soft ball that runs unpowered from her ipod touch. She uses it while studying, gardening,annoying. Is there something simple i can make thats about the same size That would sound decent other then the...

Well its time to recable ye ole q40's. Im also making a mini3 in a custom case at the same time. Im using Mogami W3106 dual wire due to the unique q40 wiring scheme. Should i stick with a normal TRS connector or should i go for a XLR connector or something? Im still including 1 TRS in the front...

Well avguide.com just finished up their six month review of usb audio. TAS 194: The State of USB Audio | AVguide I normally hang out in the diy forum but i was wondering what other people thought of this crap. He thinks a $500 6 foot usb cable sounds better then a $50 usb cable (guess...

Does anyone have a BOM for the mini3 that contains the most amount of surface mount parts you can replace? After the Ckkkiii or what ever build, my work says i cant use thru hole for side projects anymore. If i can replace the resistors with 1206's or something that only leaves like a half dozen...

Ok we happened to break one of these: Internal dimensions are 2.50" wide 2.25" tall and 5" long. I was wondering what would fit in it and sound good with a usb dac and some M-audio q40 50ohms? I think i can fit a mini3 but i was wondering if a cmoy or ra1 clone would be better.

I work in a small electronics lab and we are encouraged to have side projects as long as they are related to the tech we are building. Well after a SS a gamma dac and a cKKIII they said no more thru hole stuff. So what are my options for a new project for a small desktop amp? I can make a Bantam...

Just got this in the emails: Quote: Dear hohodiy.com's members... -- English version -- [hohodiy.com] will close at July 1st, 2009. The order deadline is at June 30, 2009 pm. 11:59 The bbs.hohodiy.com and hohodiy - Login will also closed at July 1st, 2009 About order status and...

If you leave your computer on 24/7 the only damage is the fans and the bearings. If you leave your tv on 24/7 you wear out the tube, and the super hot spots on the horizontal and vertical transistor solder joints. So if i have a cool running non tube headphone amp with a regulated powersupply...