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Recommend a strip board for a dips
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?- nightanole
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- Replies: 0
- Forum: DIY (Do-It-Yourself) Discussions
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Phase angles at cut off frequencies of RC filters
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...- nightanole
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- Replies: 1
- Forum: DIY (Do-It-Yourself) Discussions
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Passive stereo summing circuit
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- nightanole
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- Replies: 3
- Forum: DIY (Do-It-Yourself) Discussions
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Alternate volume controls
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...- nightanole
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- Replies: 8
- Forum: DIY (Do-It-Yourself) Discussions
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Power buffer for a mini3
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...- nightanole
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- Replies: 5
- Forum: DIY (Do-It-Yourself) Discussions
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Tube buffered 4870 gainclone kit
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.- nightanole
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- Replies: 12
- Forum: DIY (Do-It-Yourself) Discussions
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Happy vu meter connection
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...- nightanole
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- Replies: 1
- Forum: DIY (Do-It-Yourself) Discussions
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Simple Inrush Current Limiter for power supply
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...- nightanole
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- Replies: 15
- Forum: DIY (Do-It-Yourself) Discussions
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Logarithmic analog vu meter
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...- nightanole
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- Replies: 0
- Forum: DIY (Do-It-Yourself) Discussions
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figuring out an unknown transfomer
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?- nightanole
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- Replies: 8
- Forum: DIY (Do-It-Yourself) Discussions
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unity gain dc strait tube buffer / preamp?
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...- nightanole
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- Replies: 3
- Forum: DIY (Do-It-Yourself) Discussions
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stacking transfomers
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?- nightanole
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- Replies: 4
- Forum: DIY (Do-It-Yourself) Discussions
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Something other then hammond?
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.- nightanole
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- Replies: 19
- Forum: DIY (Do-It-Yourself) Discussions
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Connector isolation for metal panel
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...- nightanole
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- Replies: 7
- Forum: DIY (Do-It-Yourself) Discussions
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Recommendation: really open back cans for movies
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...- nightanole
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- Replies: 6
- Forum: Headphones (full-size)
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Recable with John's Silver Teflon Wire
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...- nightanole
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- Replies: 15
- Forum: DIY (Do-It-Yourself) Discussions
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Denoise a switching power supply
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...- nightanole
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- Replies: 11
- Forum: DIY (Do-It-Yourself) Discussions
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Ipod speaker
...sound decent other then the lows? I was thinking maybe this mounted on a piece of alum bent at a 45 so it looks nice to her: Parts-Express.com:*Tang Band W2-803SM 2" Driver | full range driver 2" woofer extended range driver tang band tb speakers The only problem is its 4ohm so im not...- nightanole
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- Replies: 5
- Forum: DIY (Do-It-Yourself) Discussions
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Stick with TRS? recable time
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...- nightanole
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- Replies: 14
- Forum: DIY (Do-It-Yourself) Discussions
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AVGuide hates usb
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...- nightanole
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- Replies: 76
- Forum: Computer Audio
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Mini3 SMT build?
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...- nightanole
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- Replies: 2
- Forum: DIY (Do-It-Yourself) Discussions
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stealth install
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.- nightanole
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- Replies: 0
- Forum: DIY (Do-It-Yourself) Discussions
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SMT amp?
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...- nightanole
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- Replies: 1
- Forum: DIY (Do-It-Yourself) Discussions
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No more Hohodiy sniff sniff
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...- nightanole
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- Replies: 3
- Forum: DIY (Do-It-Yourself) Discussions
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Leave your amp on till the end of time?
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...- nightanole
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- Replies: 7
- Forum: DIY (Do-It-Yourself) Discussions