| Author |
Message |
J3RK
Joined: Jun 05, 2006
Posts: 90
Location: Seattle
|
 Posted: Tue Mar 08, 2011 11:05 am Post subject:
|
  |
|
| I admire board etchery. That was purely a diagnostic comment/question. I very nearly bought all the items to do it, but I currently have a time-deficit, so I just get small proto-batches done of things usually. |
|
|
Back to top
|
|
 |
L-1
Joined: Dec 11, 2010
Posts: 39
Location: Belarus
Audio files: 4
|
|
|
Back to top
|
|
|
beautyofdecay_
Joined: Aug 14, 2009
Posts: 38
Location: Netherlands
|
| Posted: Mon Mar 21, 2011 12:22 pm Post subject:
|
|
|
That looks OK to me.
Good idea BTW!
.
_________________
www.ecalpemos.nl |
|
|
Back to top
|
|
|
L-1
Joined: Dec 11, 2010
Posts: 39
Location: Belarus
Audio files: 4
|
| Posted: Mon Mar 21, 2011 1:47 pm Post subject:
|
|
|
It pleases. Will try.
I'm going to build a block of six VCO's with common 10-turn frequency pot and a mixer.
I think to draw own layout and use BC857BS/BC847BS transistors pairs similar to Bergfotron VCO's. It will much cheaper.
Will post the results... |
|
|
Back to top
|
|
|
Peake
Joined: Jun 29, 2007
Posts: 1095
Location: Loss Angeles
Audio files: 3
|
| Posted: Tue May 24, 2011 1:59 pm Post subject:
|
|
|
I have had a clone designed of the 258B (not the "C") and can confirm that L-1's 3PDT switch concept works just fine. Thank you! You posted it at the perfect time for my project. A very, very clever observation! I've stared at the 258 schemos for years and never noticed that.
Note that my "clone" is not approved by Don Buchla for public release. He just didn't want anyone to use original artwork, so I had someone CAD up the old schemo plus a few new bits. Not, unfortunately 1V/Octave, but I'm considering it. Could just get a few Plan B Model 15s...
_________________
We are selling emotions, there are no emotions in a grid. -mwagener
"IC 741. Sometimes you don't want fidelity." -Small Bear Electronics Catalog |
|
|
Back to top
|
|
|
L-1
Joined: Dec 11, 2010
Posts: 39
Location: Belarus
Audio files: 4
|
|
|
Back to top
|
|
|
Peake
Joined: Jun 29, 2007
Posts: 1095
Location: Loss Angeles
Audio files: 3
|
| Posted: Wed May 25, 2011 12:21 pm Post subject:
|
|
|
Wow...Outstanding. I look forward to hearing your finished boards!
I have hundreds of 49K9 resistors if you want me to mail you some (from America, could take a while). I bought a huge batch of them because they are so weird and show up in Buchla designs...
_________________
We are selling emotions, there are no emotions in a grid. -mwagener
"IC 741. Sometimes you don't want fidelity." -Small Bear Electronics Catalog |
|
|
Back to top
|
|
|
L-1
Joined: Dec 11, 2010
Posts: 39
Location: Belarus
Audio files: 4
|
| Posted: Wed May 25, 2011 5:11 pm Post subject:
|
|
|
Thank you Peake but I wait for my parcel this week with 49K9 and other parts for my builds.   |
|
|
Back to top
|
|
|
L-1
Joined: Dec 11, 2010
Posts: 39
Location: Belarus
Audio files: 4
|
| Posted: Sat Jun 11, 2011 7:38 am Post subject:
|
|
|
I have finished 3 oscillators. Everything works as excepted. I post docs and photos. Maybe it will be interesting to someone.
| Description: |
|
| Filesize: |
17.22 KB |
| Viewed: |
8499 Time(s) |
|
| Description: |
|
| Filesize: |
11.61 KB |
| Viewed: |
8499 Time(s) |
|
| Description: |
|
| Filesize: |
58.99 KB |
| Viewed: |
88 Time(s) |
| This image has been reduced to fit the page. Click on it to enlarge. |
|
| Description: |
|
| Filesize: |
54.46 KB |
| Viewed: |
96 Time(s) |
| This image has been reduced to fit the page. Click on it to enlarge. |
|
| Description: |
|
| Filesize: |
52.27 KB |
| Viewed: |
108 Time(s) |
| This image has been reduced to fit the page. Click on it to enlarge. |
|
|
|
|
Back to top
|
|
|
L-1
Joined: Dec 11, 2010
Posts: 39
Location: Belarus
Audio files: 4
|
| Posted: Sat Jun 11, 2011 7:44 am Post subject:
|
|
|
Waveforms, v/octaves and finally pcb design.
| Description: |
| waveforms from saw to sine |
|
| Filesize: |
43.54 KB |
| Viewed: |
8494 Time(s) |
|
| Description: |
| waveforms from square to sine |
|
| Filesize: |
42.07 KB |
| Viewed: |
8494 Time(s) |
|
| Description: |
| v/octaves are perfect for 5 octaves |
|
| Filesize: |
100.23 KB |
| Viewed: |
91 Time(s) |
| This image has been reduced to fit the page. Click on it to enlarge. |
|
| Description: |
|
Download |
| Filename: |
L-1 258.pdf |
| Filesize: |
94.71 KB |
| Downloaded: |
143 Time(s) |
|
|
|
Back to top
|
|
|
L-1
Joined: Dec 11, 2010
Posts: 39
Location: Belarus
Audio files: 4
|
|
|
Back to top
|
|
|
ericcoleridge
Joined: Jan 16, 2007
Posts: 883
Location: NYC
|
| Posted: Sat Jun 11, 2011 10:17 am Post subject:
|
|
|
| L-1 wrote: | | Waveforms, v/octaves and finally pcb design. |
This is truly inspiring work L-1, thanks for posting all of this info. Will you post the PCB etch layout also (without the parts overlay)? |
|
|
Back to top
|
|
|
L-1
Joined: Dec 11, 2010
Posts: 39
Location: Belarus
Audio files: 4
|
| Posted: Sat Jun 11, 2011 10:41 am Post subject:
|
|
|
| PDF file contains 3 pages, second is etch layout, third is etch layout for transistor pairs 'IC'. |
|
|
Back to top
|
|
|
Sebo
Joined: Apr 27, 2007
Posts: 517
Location: Argentina
|
| Posted: Sun Jun 12, 2011 9:24 am Post subject:
|
|
|
Hi:
I etched the Mark Verbos layout, but never build it, I want to see what differences have with your layout, but I can't open the PDF (the archive is damaged error).
Thank you.
_________________
Sebo
---------------------------------------
My Music:
www.cosaquitosenglobo.com.ar
www.myspace.com/cosaquitosenglobo |
|
|
Back to top
|
|
|
L-1
Joined: Dec 11, 2010
Posts: 39
Location: Belarus
Audio files: 4
|
|
|
Back to top
|
|
|
LFLab
Joined: Dec 17, 2009
Posts: 142
Location: Rosmalen, Netherlands
|
| Posted: Mon Jun 13, 2011 6:14 am Post subject:
|
|
|
| Like the idea of the daughterboard solution for the double transistors, but those BC847/857BS aren't exactly abundant, where did you buy them? |
|
|
Back to top
|
|
|
Sebo
Joined: Apr 27, 2007
Posts: 517
Location: Argentina
|
|
|
Back to top
|
|
|
L-1
Joined: Dec 11, 2010
Posts: 39
Location: Belarus
Audio files: 4
|
|
|
Back to top
|
|
|
L-1
Joined: Dec 11, 2010
Posts: 39
Location: Belarus
Audio files: 4
|
| Posted: Tue Jun 14, 2011 8:49 am Post subject:
SOUNDS |
|
|
Device is ready. Here is some photos and sound, it is dry oscillators without effects, eq and compression. 1,2,3 osc left, 4,5,6 right channels, I play some notes from keyboard, saw wave, first 2 osc then 4 then 6 together.
| Description: |
|
| Filesize: |
74.75 KB |
| Viewed: |
81 Time(s) |
| This image has been reduced to fit the page. Click on it to enlarge. |
|
| Description: |
|
| Filesize: |
69.46 KB |
| Viewed: |
80 Time(s) |
| This image has been reduced to fit the page. Click on it to enlarge. |
|
| Description: |
|
| Filesize: |
67.9 KB |
| Viewed: |
104 Time(s) |
| This image has been reduced to fit the page. Click on it to enlarge. |
|
| Description: |
|
Download |
| Filename: |
258 osc test.mp3 |
| Filesize: |
3.74 MB |
| Downloaded: |
213 Time(s) |
|
|
|
Back to top
|
|
|
Peake
Joined: Jun 29, 2007
Posts: 1095
Location: Loss Angeles
Audio files: 3
|
| Posted: Wed Jun 15, 2011 10:54 am Post subject:
|
|
|
WOW
Beautiful build, beautiful panel, can't wait to hear more mp3s!
_________________
We are selling emotions, there are no emotions in a grid. -mwagener
"IC 741. Sometimes you don't want fidelity." -Small Bear Electronics Catalog |
|
|
Back to top
|
|
|
L-1
Joined: Dec 11, 2010
Posts: 39
Location: Belarus
Audio files: 4
|
|
|
Back to top
|
|
|
LFLab
Joined: Dec 17, 2009
Posts: 142
Location: Rosmalen, Netherlands
|
| Posted: Wed Jun 15, 2011 1:04 pm Post subject:
|
|
|
| Looks and sounds great L-1! Superb idea with the BC double bjt's as well, saves a bundle! |
|
|
Back to top
|
|
|
shawn
Joined: Dec 13, 2005
Posts: 208
Location: savannah
|
| Posted: Thu Jun 16, 2011 8:58 am Post subject:
|
|
|
| Great work!!! |
|
|
Back to top
|
|
|
|
Forum index » DIY Hardware and Software
FAQ
Calendar
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
Chat Room
