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Post by svart on Jul 25, 2013 7:55:37 GMT -6
I've always been a fan of DIY, but I burnt out on it a few years ago when GroupDIY became so big and my day job became really hectic and busy. I simply prefer etching my own PCBs and trying to reuse parts and making something awesome from as little as possible. I suppose it's a lot more extreme than stuffing a kit, but I also save a bunch more money! So anyway, after a number of original "for profit" projects that I've been working on and besides the daily engineering job, I've gotten the DIY bug again and have been working on a few "not for profit" projects which almost brought me back to basics. I had almost all the parts for the SSL9k laying around and decided that I should just go ahead and make a PCB and use them. It took about 2 weeks to draw this out in my free time, thus I am only putting this up here as "not for profit". You can etch and build yourself silly but please don't use these to make money or to make commercial PCBs to sell. The 4 channel SSL9k with power supply for 6x9 single sided etch:  The trace layout for etching: SSL9k trace layoutThe overlay for stuffing: SSL9k overlayI haven't tested *this* version of PCB. I built the version before this one and found a few small errors that I fixed on this one. I'm going to leave a few of the things you need to figure out, up to you to figure out! Isn't that the fun of it? EDIT: I will say two things about this, one specifically because it could render some parts damaged. In the TL052 spot, I used TLE2052 instead. This is an improved part that can handle the +/-18v so that you don't need 15v rails as well. There are no 15v rails and if you stuff the TL052, it'll probably fry. You can also use OPA2134/OPA2604 if you choose. I think even the TL072/82 will work fine as well, but I haven't tried. The second thing is that the opamps are SOIC8 parts. Yep, that's SMD stuff. I intended to do the whole thing in SMD but decided to just use the through hole stuff I had to save money. |
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Post by tonycamphd on Jul 25, 2013 9:31:29 GMT -6
Yikes! really real is right! for real! very impressive, great contribution to say the least. I gotta wrap up a bunch of projects, this'll get tacked on now...geeez
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Post by svart on Jul 25, 2013 9:36:14 GMT -6
Here's mine being tested. I did mine a little differently, I etched the bottom layer as the top layer and stuffed it like that so I could debug it without taking it out of the chassis. It worked but it was hard soldering some of the parts.  |
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Post by Gustav on Jul 26, 2013 0:24:30 GMT -6
Very cool, Svart.
Gustav
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Post by svart on Jul 31, 2013 7:41:43 GMT -6
I'm working on another DIY project, one I've had around for a long time.. Can you guess what it is?  |
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Post by tonycamphd on Jul 31, 2013 11:12:54 GMT -6
this stuff looks amazing svart, i don't know what it is on your last post, but it looks vaguely familiar, i see it on its side on it's side, split up into 4 lol! reminds me of a dbx comp?
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Post by svart on Jul 31, 2013 11:29:07 GMT -6
I'll give you a hint.. There's 4 class A channels..
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Post by 51xAudio on Aug 1, 2013 6:34:32 GMT -6
4 x NEVE output stages ...
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Post by svart on Aug 1, 2013 7:59:47 GMT -6
Good guess. It's 4x hotrod 1272. It's an older layout so I didn't integrate the power supply, which I'll do on another revision.
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Post by b2 on Aug 2, 2013 4:52:40 GMT -6
Hi Svart,
I like this kind of "easy pcb" design ,great and nice job!! For sure it's do the job with nice transformers!
That's what I say, not doing pcd as "industrial" pcb , mine are most ...looking as 70-80's one with large traces..
all the best!
bruno.
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Post by b2 on Aug 2, 2013 5:05:40 GMT -6
Hi Svart, I like this kind of "easy pcb" design ,great and nice job!! For sure it's do the job with nice transformers! That's what I say, not doing pcd as "industrial" pcb , mine are most ...looking as 70-80's one with large traces.. all the best! bruno. Here's some pics of mine..for my tube preamplifier (Black one on the last picture) based on 12au7 /6189 tube " all the best! bruno |
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Post by svart on Aug 2, 2013 8:50:03 GMT -6
That looks really good Bruno. I always enjoy doing my own layout and etching. It's quite a puzzle to make everything fit, but then it's also rewarding when you make something very personal.
I also attempt to use as many of my parts that I currently have too. I've been trying not to buy new parts for every project and just use up the stock I've had for years from all the other builds. Good thing too. I had a big bag of BC184C that I sorted for the 1272's and apparently those are not being made anymore or something. I had just enough good ones to use. Now I need to save up for the tranformers and front panel.
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Post by b2 on Aug 2, 2013 9:26:49 GMT -6
I agree ...it's quiet the same for me with tubes..For years, I collected buy tube here in France ...one of my friends have and old electronics shop from years and when I go to see in I spend time in the back of the shop and find components..that's are not made today.So I've stocked tube and when i have an idea it's go on!
It's the same for my TubeMic...
When I start 2 years ago on working design of a TubeMic...I've search to find a nice, simple ,and not so complicated schematic to work on...my choice was.....the schematic of the u47.
People were fixing on..used a ef14...ef12...ef86...ef860....ef40...and may be a vf14.My goal was not to replicated the u47,not.Decent people do this job very well of courses!
I want to build a mic with one of my tube (one which can do the job very well..) adding nice components ,adding a decent outpu transformers and a decent capsule .
The tube inside i used is a e80f from RT 1965, for me it's one of the goal one I loved!
An it do the job very very well!
The bc184c are one of my favourite, I've used it on class A micpreamp too similar to the 1290 and on the 2520 doa in front Q1+Q2 pair.
all the best!
bruno.
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Post by wiz on Aug 2, 2013 17:25:40 GMT -6
awesome fellas
cheers
Wiz
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Post by Deleted on Aug 5, 2013 19:45:40 GMT -6
Hey bruno,
E80F is a very excellent follower product of the late low profile housing EF12k, which is developed further for even lower microphonics, lower tolerances, and extreme longevity, an excellent tube.
I have read somewhere, that the biggest (only?) producer of these was Philips, and they were re-badged under all possible brand names (Siemens, Telefunken, Lorenz...) and if they still have an intact vacuum, when measured they are nearly all as good as new still today, not only the NOS, but the used ones!!!
Excellent choice for a cool tube mic!
Best regards,
Martin
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Post by b2 on Aug 6, 2013 0:53:59 GMT -6
Hi martin,
For sure you're right,I've post pics of it in the thread "Handmade Tube Mic" He..he!!
This tube is one of my favourite , when you take a look at the building ,the e80f is great building.
The e80f I've got were made by RT here's in France on the Plant named "La Radiotechnique" near Paris.
I've tested them with my B-K 707 tube tester for Gm and all are still in great condition from 1965...thoses babes are older than me!!
Cheers,bruno.
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Post by Gustav on Aug 16, 2013 13:28:37 GMT -6
An attempt from me at real DIY - Hope to finish it up tomorrow. Gustav  |
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Post by svart on Aug 16, 2013 14:57:03 GMT -6
Looks good! It's upside down though.. What are the preamps?
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Post by tonycamphd on Aug 16, 2013 15:03:44 GMT -6
real nice Gustav!!
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Post by Gustav on Aug 16, 2013 16:00:21 GMT -6
Looks good! It's upside down though.. What are the preamps? I have to access it from that bottom to finish up wiring the power strips. Its a simple THAT1512 design..no wait - its an unobtanium preamp clone! Gustav |
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Post by Deleted on Aug 16, 2013 16:34:46 GMT -6
Looks good! It's upside down though.. What are the preamps? I have to access it from that bottom to finish up wiring the power strips. Its a simple THAT1512 design..no wait - its an unobtanium preamp clone! Gustav Aaaah, i see. Full of NOS denmarkium transistors, right? Sounds like nothing else, i guess? Yeah, cool. Best regards, Martin |
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Post by b2 on Aug 17, 2013 3:11:38 GMT -6
Hi Gustav! Great and nice job ! I see on picture ..you've fix lots of red "caps" wima. Your preamp will be a usefull preamplifier for sure ...8 channel it's nice. For me I've never build a THAT's design .... Here's the work ,I've finished on this week....some will recognised ...the transformers... He He! See pics (hope thoses are not too bad...) Just to said....I'm very happy with the sound of this one! As people said "Sound is in the iron..." The result I've got is a big big part of the nice build transformers from Classicapi! The combination of the EA2622 and 2503 with the 2520 doa is the proof of that's sound. I've done a mods on the doa 2520...the Firt pair of bipolar is bc184c (cause they've got a nice Hfe more than 600..) All the best ,bruno. |
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Post by b2 on Aug 17, 2013 3:15:38 GMT -6
Here's some pics of my pcb preamp (just finish to drill the holes for components......) and doa 2520 I've build on Classicapi pcb. All the best Bruno. Attachments:
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Post by Gustav on Aug 17, 2013 3:40:18 GMT -6
I have to access it from that bottom to finish up wiring the power strips. Its a simple THAT1512 design..no wait - its an unobtanium preamp clone! Gustav Aaaah, i see. Full of NOS denmarkium transistors, right? Sounds like nothing else, i guess? Yeah, cool. Best regards, Martin Yep - the invisible ones! Finished and fired up - and a grounding issues to sort out. Oh, the joys of DIY. Gustav |
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Post by tonycamphd on Aug 18, 2013 0:24:29 GMT -6
Here's some pics of my pcb preamp (just finish to drill the holes for components......) and doa 2520 I've build on Classicapi pcb. All the best Bruno. Killer b2, real diy for sure! those are gar 2520's w/styrene's in em?? what's the madness behind that mod? I've got 10 of those built right here, I would love to not leave them as is lol! |
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