Original effects with schematics, layouts and instructions, freely contributed by members or found in publications. Cannot be used for commercial purposes without the consent of the owners of the copyright.
Hmz I'd love to try something like this, been looking for a good reason to get into tube circuit designs. Problem is, I'm a bass player, and I still haven't found a decent sounding tube OD that works on a bass .
Got Samples?
Not really a good design for bass guitar
It could be adapted to be suitable - It would need some form of blend to mix the clean fundamental notes with the distorted sound - maybe a low pass filter on the clean sound as well to avoid conflict with the distorted high end response. I may work on something in the future if sufficient interest is shown
I never do samples
But it sounds similar to the B K Butler or Chandler Tube Driver - just has a simple tone filter though instead of the treble and bass passive ladder circuit.
cheers
bajaman
been looking for a good reason to get into tube circuit designs
Let me emphasise - this is not really a tube circuit design in as much as the tube is being operated off 24vDC and not 240 - 350vDC as in normal tube design practice.
The starved plate voltages coupled with the high gain Tubescreamer type op amp drive circuit, gives a completely different overdrive characteristic to the full voltage all tube design as shown in the link below
cheers
bajaman https://i197.photobucket.com/albums/aa2 ... 1small.jpg
Important: I have found that there is a difference in metal thickness between the Hammond and NSC equivalent cases ( available from Pedal Parts Plus).
Originally i took measurements from the cheaper NSC case which has a much thinner walled and top panel thickness than the Hammond.
When i tried to fit the assembly in a Hammond case, I found that i could not fit the bottom panel. So, after a wee bit of cursin' I dismantled and trimmed the tube and control boards ( I had to remove at least 1.5mm) i refitted the boards and this time as you can see the case lid was able to fit properly.
I will redraw these boards for those who wish to use Hammond cases, but i would strongly suggest usingf the cheaper thinner NSC cases if you want to use the existing board layouts.
Sorry for any inconvenience.
cheers
bajaman
bajaman wrote:Important: I have found that there is a difference in metal thickness between the Hammond and NSC equivalent cases ( available from Pedal Parts Plus).
..
Sorry for any inconvenience.
cheers
bajaman
I'm sure we can let you off this time, bajaman!
I guess the question is what is the 'void size' for these current layouts, as some of us round these places use other brands which are nearly-but-not-quite-the-same.
Hey - very nice bool - many thanks
BUT - you should repost this in it's own thread - perhaps in the classic stompbox section etc.
It would be a shame if others miss seing this one, because it is in a tube overdrive thread - I am sure Stephen Giles will be most interested
bajaman
Looks cool Baja! How did you cut the tube hole in the large board?
I drilled a couple of holes and fitted a smallhobby hacksaw blade through then carefully cut it out ( the tube board). i use a 3/8 round file to smooth the rough edges off the opening - just one way of doing it
cheers
bajaman
Bajaman, can you perhaps also post the schematics or were they already posted and I missed them?
Thanks for sharing your PCBs. An interesting project, added to my already too large ToDo list.
Bajaman, I'm on the launch pad to build. I've re-read the thread a couple of times, perused the pictures, and I can't find the answer to one question, and it's a showstopper. Even then, I can't guarantee I haven't overlooked it.
- I will give it a try - it looks very interesting 
![[smilie=a_hrm.gif]](./images/smilies/a_hrm.gif "a_hrm"){kind=small}
![[smilie=vibes.gif]](./images/smilies/vibes.gif "vibes"){kind=small}
, without the chorus/delay, just the juicy part, with simple toggle-switches 
