New build ultimate dumble-based amp (1)
Moderators: pompeiisneaks, Colossal
New build ultimate dumble-based amp (1)
Last month I finished my new amp based on a lot of research on Dumble amps and especially this wonderful forum. I used several parts of my first build (based on ideas from the AX84 site) as trafos and tubes. My objective was to build the ultimate amp for me and document it a lot better then I was used to. After a few weeks testing and tweaking everything works fine now so it’s ready for reproduction.
My objectives were:
• Build on a real point-to-point base to achieve maximum flexibility.
• 40 watts output.
• An integrated dumble-ator.
• An integrated reverb based on one tube.
• An integrated tremolo based on one tube.
• A 3-way footswitch for PAB, OD and mid-boost.
• Easy operating without footswitch (it means also switches on the front-panel).
Because this forum was a great help I want to share my documentation in the following attachments.
In another second topic a will attach some photographs.
My objectives were:
• Build on a real point-to-point base to achieve maximum flexibility.
• 40 watts output.
• An integrated dumble-ator.
• An integrated reverb based on one tube.
• An integrated tremolo based on one tube.
• A 3-way footswitch for PAB, OD and mid-boost.
• Easy operating without footswitch (it means also switches on the front-panel).
Because this forum was a great help I want to share my documentation in the following attachments.
In another second topic a will attach some photographs.
You do not have the required permissions to view the files attached to this post.
- LeftyStrat
- Posts: 3114
- Joined: Fri Jan 14, 2005 6:58 pm
- Location: Marietta, SC, but my heart and two of my kids are in Seattle, WA
Re: New build ultimate dumble-based amp (1)
Wow. Thanks for taking the time to document this. This looks fantastic.
It's never too late to have a happy childhood.
Re: New build ultimate dumble-based amp (1)
I'm not sure which is better, the artwork or the amp!!
I Think I Think Too Much !
Re: New build ultimate dumble-based amp (1)
Holy crap!
That layout is amazing!
You have a lot of patience!
That layout is amazing!
You have a lot of patience!
Tom
Don't let that smoke out!
Don't let that smoke out!
-
- Posts: 556
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- Location: Great Southland
Re: New build ultimate dumble-based amp (1)
Thats some serious ocd!
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- Posts: 1377
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Re: New build ultimate dumble-based amp (1)
Congrats on a great looking build
Thanks so much for sharing your work
Darin
Thanks so much for sharing your work
Darin
Re: New build ultimate dumble-based amp (1)
Wow.
Thank you for sharing.
Wow again.
Thank you for sharing.
Wow again.
Re: New build ultimate dumble-based amp (1)
Wow! That's amazing work and great attention to detail!
Thanks for sharing these!
Thanks for sharing these!
- Paul-in-KC
- Posts: 197
- Joined: Tue Jan 24, 2012 8:57 pm
- Location: Kansas City (metro area)
Re: New build ultimate dumble-based amp (1)
WOW - this is very nice work.
Can you record and post some audio clips?
I was planning to build a TW Express tribute, but this makes me give it a second thought.
The Express would be very cool to build and play - but I think I'd get a lot more use out of this design (after the build).
Very, very nice.
-Paul
Can you record and post some audio clips?
I was planning to build a TW Express tribute, but this makes me give it a second thought.
The Express would be very cool to build and play - but I think I'd get a lot more use out of this design (after the build).
Very, very nice.
-Paul
Re: New build ultimate dumble-based amp (1)
That's a very ambitious build... wow... Nice.
Music is an expression of the inexpressable ~ Vernon Reid, Musician.
Re: New build ultimate dumble-based amp (1)
Wow, I missed this when you posted. Thanks for sharing....very meticulous!
I may have to visit this one day.
I may have to visit this one day.
Chris
Cap Values on this scheme
fjonkman's schematic has me questioning the values.
Everywhere else I see the caps are in uFs and here they are in nanoFarads.
Is this a convention of the Netherlands to use nF instead of uF?
Checking my conversion math, if there is a 50nF cap and I want it in uF, I multiply by 0.001 to get a 0.05uF cap. Correct?
Thanks
Gh
Everywhere else I see the caps are in uFs and here they are in nanoFarads.
Is this a convention of the Netherlands to use nF instead of uF?
Checking my conversion math, if there is a 50nF cap and I want it in uF, I multiply by 0.001 to get a 0.05uF cap. Correct?
Thanks
Gh
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- Posts: 2629
- Joined: Wed Dec 30, 2009 7:32 am
- Location: Austin
- Contact:
Re: New build ultimate dumble-based amp (1)
Damn I never saw this either. The OP must have had a lot of free time to come up with this. Super ambitious and super cool!
To answer the question above:
1nF = 0.001uF
10nF = 0.01uF
100nF = 0.1uF
etc..
To answer the question above:
1nF = 0.001uF
10nF = 0.01uF
100nF = 0.1uF
etc..
Cliff Schecht - Circuit P.I.
Re: New build ultimate dumble-based amp (1)
The Europeans tend to like using the nano prefix.
It used to be used here more but for the last 20 years or so seems to be fading in favor of decimal points and the uF nomenclature.
It used to be used here more but for the last 20 years or so seems to be fading in favor of decimal points and the uF nomenclature.
Tom
Don't let that smoke out!
Don't let that smoke out!
Re: New build ultimate dumble-based amp (1)
I find this site helpful for keeping me on track with micro-pico-nano:
http://www.electronics2000.co.uk/calc/c ... ulator.php
http://www.electronics2000.co.uk/calc/c ... ulator.php