O hi :). This was the only good thing in my job today..... Just imagine every electronic device had a tiny man inside, buzzing about and fixing things. Greeting you with a smile when you open the box. O hi :) This was the only good thing in my job today Just imagine every electronic device had a tiny man inside buzzing about and fixing things Greeting you with smile when open box
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> hey anon, wanna give your opinion?
asd
#5 - acksl
Reply +9 123456789123345869
(01/15/2014) [-]
Just imagine every electronic device had a tiny man inside, buzzing about and fixing things. Greeting you with a smile when you open the box.
Just imagine every electronic device had a tiny man inside, buzzing about and fixing things. Greeting you with a smile when you open the box.
#7 - antoniospaghettio
Reply +1 123456789123345869
(01/15/2014) [-]
If anyone wonders why the face is there - this is normally where an electrolytic capacitor should be, but for some reason they didn't bother actually using one.
Eyes are for the leads, and the smile is just a speck of dust or a hair.
#11 to #7 - copyhat
Reply 0 123456789123345869
(01/15/2014) [-]
Could be that the capacitor would only be installed for a certain number of markets for some reason, or just that they figured that the circuit could do fine without it and would not waste money on making a new layout.

2200 uF 10 v? That's a small buggar - have some ultracapacitor madness.
#15 to #11 - antoniospaghettio
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(01/15/2014) [-]
2200uF 10v will do for most low voltage PSUs.

You have seen nothing. 10 ultra capacitors in parallel, 2.7V 3000F each - enough to melt or even vaporize metals in a fraction of a second.
#16 to #15 - copyhat
Reply 0 123456789123345869
(01/15/2014) [-]
I know, but I typically work with two rails for audio opamps and such - 50v 6800 uF takes the worst ripple there lol.

Nice one, how much did you pay for them?

pic of the workshop with a couple of studio open reel tape decks for recapping and service - do you have any projects going on?
#17 to #16 - antoniospaghettio
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(01/15/2014) [-]
Yes, this is from my melta cannon.

No, I was just bluffin, they are not mine - the strongest I have are 4700uF 35V. I use them for symmetrical PSUs.

Currently, I'm working on an analog modular synthesizer.
On the picture you can see unfinished circuit boards for voltage controlled filter, amplifier and envelope generator. Still trying to source all the necessary parts, which is pain in the ass, since there are a lot of obsolete parts needed.

Building it from scratch (etching my own PCBs). Designed by Yves Usson - I might add my own designs, like some IC based VCAs, adaptations of vintage filters (like MS-20).
I designed my own symmetrical regulated PSU.

Studio analog recorders are pretty awesome. Which are these?
I have an old Akai GX-625 reel-to-reel machine (consumer, maybe I'll try modifying it someday) and also a vintage Nagra 4.2, which is probably the best portable reel-to-reel ever made.
#18 to #17 - copyhat
Reply 0 123456789123345869
(01/15/2014) [-]
Looks good; developed laserjet prints in acid? Two LFO's?

The two electrolytic caps in your pic looks like Nichicon high grade ones, nice choice. I have a rather large stock with all sorts of vintage components (including 70's mustard film caps, optocouplers, valves, germanium transistors and 60's silicon NPN's) - what do you need to source?

The MS-20 is a cool synth indeed, though I'm more of a Hammond guy.

They're Revox B77 mkII's, high speed half track units bought from a studio. Nice little reliable decks with good specs and easy-to-get parts. Have been through a Studer B67, Sony TC-378, Tandberg 3300X and a Fostex MSR-16 in little over a year as electromechanical stuff is a fun challenge to do.

The GX-625 is no slouch and records very well (have been through some quarter track 10 inch reels recorded by a 625 in 1981...) What tape do you feed it with? The new RMGI tapestock runs very well, as do anything from the old professional BASF series. You own a ******* Nagra?! Damn, is it a stereo model?

I notice we have the same pair of pliers.
#19 to #18 - antoniospaghettio
Reply 0 123456789123345869
(01/16/2014) [-]
Yes, I'm using cheap anti-sticky paper with laser jet, then etching in ferric chloride. I tried UV exposure - pain in the ass. Toner transfer master race.
These are just 22uF for power buffering, nothing critical. I usually use Panasonic caps.

Some of the obsolete/rare parts: LM394 transistor pair, CA3046/CA3080 transistor arrays, Styroflex caps 270p 1%, 3300ppm tempo 1k resistors. A digital analog converter MAX525, for the MIDI-CV interface. Also I need a lot of Dupont connectors. Finding a lot of good potentiometers at an affordable price is also not so easy.
Ebay is a great source - slow delivery though. Fortunately all these components are still available in China.

Sturder is really nice. Basically any professional reel-to-reel is.
I had a chance of playing with 2" studio Otari machines - I wish I had one at home I think a recording studio is never complete without a real analog tape multi-tracker.

Unfortunately, I have the mono version of Nagra (took a picture). I use RMGI tapes - probably the only manufacturer in Europe that still makes analog tape.
Yes, audio electronics is a pretty awesome thing. No matter how good DAWs will get, there will be demand for high-end analog gear.

My dream is to build my own recording studio, self made analog gear and maybe even a big mixing desk.
It will probably take decades of hard work, research and a lot of money - but that makes it very interesting and it can quickly become overwhelming. I'm mostly self taught at electronics.

#20 to #19 - copyhat
Reply 0 123456789123345869
(01/16/2014) [-]
I helped a friend with building a studio just over a year ago - threading hundreds of meters of low capacitance double shielded cable, making proprietary 8 channel headphone bus mixers in the main studio room with Tascam standard 25 pin plugs, replacing 1200 caps in an old Soundcraft Series 800 desk and redesigning the 32 input channelstrips to use high quality Burr Brown opamps and high precision pots. The Studer and Fostex were imported and modified accordingly to handle the +4 dB levels with low impedance.

The next stage is a rackmounted 8-channel valve mic preamp that can be used as a valve buffered DI; the design is ready to be printed, with valve buffered EQ section and some pretty neat pre/post monitoring functions included. We just need a few more interested in the project to make it pay itself - until then we need to put some 1176-style comps together and get a 2 inch 24 track tape deck; an Otari MTR-15 is on the wishlist at the moment.

Ahh, I can't help ya there - just too far out of what I normally have; can maybe help with the LM394's.

Still a nice Nagra. You feed it with LPR35? Keep in mind that a +6 dB tape has a lower bias point than what the Nagra is set up for
#12 to #7 - blablawat [OP]
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(01/15/2014) [-]
Actually the original one was ****** up by the heat from the transformer and I was relacing it with a new one, when I saw this
#13 - anon id: d87647e8
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(01/15/2014) [-]
**anonymous rolled a random image posted in comment #5 at Twerking is not for everyone... ** electrolytic capacitors' face when
**anonymous rolled a random image posted in comment #5 at Twerking is not for everyone... ** electrolytic capacitors' face when
User avatar #10 - megamolester
Reply 0 123456789123345869
(01/15/2014) [-]
reminds me of adventure time! it's like finn and jake went into another dimension, where the world is a giant computer, and they meet that guy in that very computer. that little dude is the computers care taker, like wall-e.
#8 - captainhobnob
Reply -2 123456789123345869
(01/15/2014) [-]
#14 to #8 - sirbrentcoe
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(01/15/2014) [-]
i can't. you don't have the capacity to comprehend your request.
User avatar #1 - glimfarg
Reply 0 123456789123345869
(01/14/2014) [-]
My guess would be power supply for a tv or neon sign ? Definetly high voltage something. What is it ?
#2 to #1 - blablawat [OP]
Reply 0 123456789123345869
(01/14/2014) [-]
You were close - PS for the industial computer on a textile winding machine.
User avatar #3 to #2 - glimfarg
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(01/14/2014) [-]
Ah I should have known from the number and variety of captacitors and the at least 2 watt diodes. Carefully filtered dc power supply.
#6 to #3 - antoniospaghettio
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(01/15/2014) [-]
Don't know man, PSU's are always pretty similar.   
   
This is clearly something with a reasonable amount of juice - big transformer, passive cooling with a heatsink (probably for the regulators), fat caps and resistors. Looks like a linear, mains AC to DC PSU.    
   
It wouldn't be enough to power heavy machinery.     
The single sided printed circuit indicates that it is pretty old.   
   
I would have said some kind of old big precision electronic device, but it's impossible to tell which kind precisely.
Don't know man, PSU's are always pretty similar.

This is clearly something with a reasonable amount of juice - big transformer, passive cooling with a heatsink (probably for the regulators), fat caps and resistors. Looks like a linear, mains AC to DC PSU.

It wouldn't be enough to power heavy machinery.
The single sided printed circuit indicates that it is pretty old.

I would have said some kind of old big precision electronic device, but it's impossible to tell which kind precisely.
#9 - toyroom
Reply -1 123456789123345869
(01/15/2014) [-]
**toyroom rolled a random image posted in comment #320313 at Shin Anime Social Board **
#4 - swordmasterredman
Reply -3 123456789123345869
(01/15/2014) [-]