Hey, you all. It's been say ... 2-3 years? But now my needs changed, I need to forgo my YAHA amp and Szekeres amp. Also my souped up CMOY amp is too high gain for my new CDP and Computer output. So this give me excuse to build a new one. I was thinking going uber is a nice change as I can...

Hey, I am currently working on recabling PX100. I am thinking about using a hot knife to surgically remove the plastic over the cable fixture, but I found something. Lookie this. http://www.audiofil.net/forum/forum_posts.asp?TID=8209 I don't have a clue which language it is written...

Hehe, It's a time for volume knob show off. Shabby plastic knob users need not post. Come people. Let me show you my new knob! From local vender in Tokyo. I think it's remaining stock of factory floor. Kinda shady, but it's totally possible around here. Now show me yours. T

Hey, Just yesterday, ... I was tracking down buzz on my amp. I had my "real" work on my desk, so I was working on my amp on the floor. So by 3AM, my neck was stiff and my back was hurting. And, apparently, my brain was a doodoo. I knew it was coming from AC, but didn't know where. I...

Ay, I built myself a new buzzing amp. Did star grounding and all the fun stuff. I even threw in a line filter. I kinda worked down to two possibilities. One, there is some odd current flow on the chasis. I grounded everything electronically, but I am still getting...

Hey, I just repairing my poor Web Radio. This thing is done on dual layer board. When I turn it on CPU/Memory etc were all down; occasionally it turns on normally to upset me. It took me 1 month to figure this out, but sometimes through-hole conduction doesn't work. So I soldered one...

Hey, Lookie this. http://bb-shout.tristate.ne.jp/ Too bad the site is completely in Japanese. But it works pretty well. You all should keep an eye on stuff like this one. You can package this with an amp and you would finally be free of computer noise. ciao! T

Hey all, Some of us have experienced nice results bypassing the voltage gain stages of our amplifiers. (Some of us never build the voltage gain stages. ME!) Some of us have experienced nice results from single opamp and not using a buffer. (I did this too.) You all throw in some...

Hey, I am very comfortable using linear regulators, in fact, I can probably build a single linear PSU with my eyes closed. But I am fed up with having a big "iron ore" around. (I m fed up with recycling it from proj to proj, too) Is a switching PSU truly bad as we say? I have been one to...

Hi, I think I started to build the very first amp I have ever built again 2 months ago. Well ... I just finished today. So here you go. This is a simple as you can get Szekeres Amp. This amp is built in the belief that voltage gain is not necessay for low impedance can. Recent few...

Hey, I just got A first AUDIOPHILE speaker in my whole life for my office. Note the "A". I got ONE. Anyways, according to what I hear, if my space is mediocre having stereo isn't much greater than having mono. So I thought I would just build myself a mono amp or preamp (they are lending me...

Hello, I just attended an exposition for soldering/processing ... (well this expo got fibre-optics to lithography machines) I took this opportunity to ask around about Lead-Free Solders. Good many people told me "gray-looking-soldering contact make no difference so who cares." I am sure...

Hey, I have been asking around among industry bunch. They told me they no longer use lead in any of their products. This bothers me, because I am a fan of normal solder with lead in them. I like it because it melts at lower temperature. Lead-Free types melt at higher temp and if I am not...

Hi, [This is for UNBALANCED amps] I have been fiddling my amps. (because I am a bit fed up with work. ...) Anyways, I have been getting noise problems with newly wired passive preamp. The stepper switch is HUGE so I had to give it it's own chasis. Anyways, this thing work for some...

Hi, Good long time ago, I posted about using CMOS logic chip for analogue-fun. I was hoping someone else will do the testing so save me troubles. Anyways, I finally got my sorta-job. So I took a day off and built me a 74HCU04 amp. The schematics is here in this application note...

Hey, Guys it ain't a pair of headphones, but it is an excellent surround sound in a mini package. You guys should audition it. http://www.niro1.com/en/products/moviemouse.html Cheerios, Tomo

Hi, I am thinking about launching another adventure. This time with some power opamps like LM1875 or LM675. I believe if driving at low power, these chips will operate at Class-A. The subject will only drive low impedance headphones. Thus, the gain can be very low. (Input offset...

Hello, One of fellow members has requested this good old combination for use with his amps. I am posting publicly because others might benefit as well. Please note this picture has been extracted from BUF634 specs (last page) Tomo P.S. Currently I don't use Wide Band Mode. I...

Hey, I just picked up a soldering station called: Weller TC202 Power Unite (60W 120V 60Hz) with TC202 iron unit (24V) I need specs for this iron. Thanks, T

Hi, http://www.ndh.net/home/kboehm/SE-2x1w.htm I think it is very usable. I found it long ago, but I lost the link. Now I have it. So I am posting. T

Hello, Before anything please forgive me for keeping your soldering fingers warm and itchy. I really did not mean to leave you in wonders. Our FTP server went down and I could not upload to our website server. Anyways, it's fixed. (And, I was working my butt off at office. ...) So here it...

Hey, I am posting the pic of my Szkeres amp. Sorry for Super Low Rez Note I did a doodoo and completely forgotten about input coupling cap. Hehe. That is why they are mounted on the side wall. But all in all, looks fine. Sound pretty good too. Well suited for my low impedance cans. (I...

Hey, I have refitted my Szkeres amp. I made two great assumptions: "Low impedance headphones ONLY" "AD HOC!!" This means the amp does not have to swing a lot. So CCS offer negligiable benefit. The amp should stay linear within 0.7V margin. I paralleled 1000uF, 4.7uF, and 0.47uF for...

Hey, I found a large quantity of 5kohm RN55 resistors. About 50 of them. And first thing that came to mind was ... Stepped Attenuator. I have 24-step rotating switches too. And I remembered Rick's schematics he posted few days ago. He paralleled a linear potentiometer with a resistor to...

Hey, After been inspired with countless people, I decided it might be time for me to upgrade. I never really use my secondary system because I rarely listen outside of my own home these days. (My apology for the lateness.) In fact, it was so dusty I had to replace the rubber things for the...