Peter Aczel: The man that destroyed audio snake oil
https://lemmy.world/post/44252359
Peter Aczel: The man that destroyed audio snake oil - Lemmy.World
Vintage Audio Addict is a great YT channel that I recommend for all Budget
Audiophiles to subscribe to. This video is a dissertation on the work of Peter
Aczel. An engineer that lays it out in plain language how audio really works and
why “Audiophiles” are wasting their money. I’ve known about Peter for quite some
time and his perspective went a long way in shaping my own in regards to audio
equipment.
Budget doesn't need to mean cheap junk, with a little knowledge and work.
https://lemmy.world/post/24195950
Budget doesn't need to mean cheap junk, with a little knowledge and work. - Lemmy.World
WARNING: In this post I talk about working on HIGH POWER electrical circuits. DO
NOT DO THIS UNLESS YOU HAVE BEEN TRAINED… PERIOD! The capacitor in the final
photo is quite easily capable of KILLING YOU if you discharge it through
yourself. The amp uses TWO of those in its power supply. As a hobby, I pick up
distressed amplifiers, receivers, and other audio equipment and attempt to bring
them back to life. This has netted me some spectacularly great pieces for
pennies on the dollar, to outright free.
This photo is a receiver I picked up locally for free. Both main channels were
“out”. It wasn’t the internal amplifier that was the problem though, rather the
input board had some dry solder joints. About 3 hours of soldering netted me a
perfectly working receiver, which has been in my living room for the past two
years working perfectly. If you want photos of when I took it apart, just let me
know.
[https://lemmy.world/pictrs/image/42efd258-1417-4e91-bdd0-dda01a815873.jpeg]
Below is an 8 channel McIntosh MC7108 that I bought off of eBay listed “for
parts”. While what I paid for it probably doesn’t fit the definition for
“budget”, it was less than a quarter what the amp is worth… So maybe budgetish?
It’s works great, but I ended up not really fixing it. It actually worked for
about a week after I bought it. I thought I had really scored, until it started
up with a horrendous buzzing noise that came from inside the cabinet. The
protection circuits also kicked in and the amplifier would not power up. Some
investigation, again photos are available if you want to see them, revealed that
buzzing came from a bad capacitor and relay in the on/off switch circuit. As I
didn’t care about the on/off switch, I simply bypassed it. Now, if the amp is
plugged in, it turns on. I control it using a Zwave outlet (look at the power
outlet and you’ll see it) and that is what I use to turn on and off the entire
stack you see. Below the McIntosh is a Carver TFM-15B that needed the input pots
cleaned and new meter lights. It’s not a well built amp, but I’ve always loved
Bob Carver’s work and it sounds very warm. Bob was known for is ability to copy
the sound of much more expensive amplifiers in his design, which he called
“Transfer Function.” In the case of the TFM-15B is copies the sound of a Classe
amp, although I don’t remember which one. Below that is my wife’s old
Soundcraftsman amplifier that I put new power supply capacitors in. The caps in
that thing are the size of coke cans… Don’t believe me? See the last photo… At
the very bottom is an old HTPC I built many years ago. It is retired as an HTPC
and is currently serving as a low power server for my house.
[https://lemmy.world/pictrs/image/fe0b1fd0-0147-4034-9d9f-c7d3a307f4fd.jpeg] Big
honking Capacitor:
[https://lemmy.world/pictrs/image/8691b917-ed9d-4b7b-a036-a7dbbc7061b2.jpeg]
School Shooting: Abundant Life Christian School
https://lemmy.world/post/23213384
School Shooting: Abundant Life Christian School - Lemmy.World
Channel 3000 Coverage
[https://www.channel3000.com/news/three-dead-including-suspect-in-shooting-at-abundant-life-christian-school/article_207c213c-bbd1-11ef-8bd0-db64a8c48a39.html]
As of 1:50pm CST: 5 are dead, 5 more injured and the shooter is dead (not
counted in the fatality count) Absolutely unbelievable that this crap has come
to Madison.
Is it as bad as I think it is? - Lemmy.World
Sorry for the bad image quality. The image is of the top of piston 4 and the
cylinder wall in a Toyota 2AR-FE with 162,000 miles. All Toyota recommended
maintenance was performed throughout the engine’s life. I have the feeling those
recommendations were written by marketing people and not the engineers. Based on
what the image shows, the engine needs a short block. Am I correct?
