Author |
Message |
seaweedfactory
Joined: Apr 12, 2006 Posts: 61 Location: Earth
|
Posted: Sat Jun 07, 2008 5:54 pm Post subject:
. |
|
|
. Last edited by seaweedfactory on Sun Jul 06, 2014 7:29 pm; edited 2 times in total |
|
Back to top
|
|
|
blue hell
Site Admin
Joined: Apr 03, 2004 Posts: 24075 Location: The Netherlands, Enschede
Audio files: 277
G2 patch files: 320
|
Posted: Sat Jun 07, 2008 5:59 pm Post subject:
|
|
|
Moved your message to the new CGS section (in the hope that the question will get better attention there ) _________________ Jan
also .. could someone please turn down the thermostat a bit.
|
|
Back to top
|
|
|
andrewF
Joined: Dec 29, 2006 Posts: 1176 Location: australia
Audio files: 4
|
Posted: Sat Jun 07, 2008 7:13 pm Post subject:
|
|
|
For the psu, I did it the way Paia does it for the Fatman and Tubehead pre-amp (although theirs is for 12V).
One output of the transformer is the power rail, the other to ground. Here's a very basic diagram, of course don't forgot all the caps, fuses and whatall.
Really it is worth trying to get your hands on a transformer that puts out 100-180V, a lot simpler. plenty on ebay.
It doesn't need to be big, tubes use very little 'high voltage' current .
The tube heaters are another story - expect 300mA per tube, so for say 10 tubes, you want a 6.3V 3A supply.(edit - crappy pre-coffee maths)
Keep in mind the caps will retain voltage for a long time after the PSU is turned off. originally mine still held 100V an hour after it was unplugged. You need to include bleeder resistors across the caps so they drain more quickly.
Keep one hand in your pocket.
Have a good look at Rene's neon VCO, very easy to build and sounds great...plus its V/Oct.
There are a lot of schematics in yahoo group - tubesynthdiy
that may or may not be useful
Description: |
|
Filesize: |
8.42 KB |
Viewed: |
10295 Time(s) |
|
|
|
Back to top
|
|
|
otherunicorn
Joined: May 11, 2008 Posts: 136 Location: Australia
|
Posted: Sun Jun 08, 2008 2:48 am Post subject:
|
|
|
Basically What I did was to duplicate the positive section of the PSU, but with the diodes and capacitors reversed. _________________ http://www.cgs.synth.net/ |
|
Back to top
|
|
|
seaweedfactory
Joined: Apr 12, 2006 Posts: 61 Location: Earth
|
Posted: Sun Jun 08, 2008 9:19 am Post subject:
. |
|
|
. Last edited by seaweedfactory on Sun Jul 06, 2014 7:29 pm; edited 2 times in total |
|
Back to top
|
|
|
otherunicorn
Joined: May 11, 2008 Posts: 136 Location: Australia
|
Posted: Wed Jun 11, 2008 1:18 am Post subject:
Re: Something like this? |
|
|
charles.brodeur wrote: | Otherunicorn, some thing like this? Or will I need another transformer? |
The one transformer is all you need. Yes, this is the way to go about it. Note that I have NOT thoroughly checked your diagram. _________________ http://www.cgs.synth.net/ |
|
Back to top
|
|
|
otherunicorn
Joined: May 11, 2008 Posts: 136 Location: Australia
|
|
Back to top
|
|
|
|