D*A*M - BUZZOTRON [traced]
- beedotman
- Diode Debunker
Information
Bam!
Here's mighty Buzzotron - new D*A*M take on Buzzaround with small changes in circuit:
- 470K bias resistor upped to 680K
- added small 220pF cap on Q1 between base and colector
- cap between darlington pair and Q3 lowered to 2.2uF instead 4.7uF
- 100nF in output section bumped to 220nF
- in some units 10K in output section was changed to 33K for better sweep
- 1nF could be also increased to something between 2n2 to 4n7 for more low end (but I cant' see cap value)
- diffrent values of resistor on Balance pot - 22K to 27K
Trannies are of course rare NKT213
I'm not sure of characteristic of pots, but usually linear could be used with good results.
Some guys recommended 100K reverse log as Sustain.
I got more versions comming - small vero that will fit 1590B and classic tagboard for sure. Will post them later.
For beggining layout using big veroboard.
Here's nice review and samples.
http://retrotonejunkie.blogspot.com/201 ... otron.html
Enjoy!
Peace!
b
Here's mighty Buzzotron - new D*A*M take on Buzzaround with small changes in circuit:
- 470K bias resistor upped to 680K
- added small 220pF cap on Q1 between base and colector
- cap between darlington pair and Q3 lowered to 2.2uF instead 4.7uF
- 100nF in output section bumped to 220nF
- in some units 10K in output section was changed to 33K for better sweep
- 1nF could be also increased to something between 2n2 to 4n7 for more low end (but I cant' see cap value)
- diffrent values of resistor on Balance pot - 22K to 27K
Trannies are of course rare NKT213
I'm not sure of characteristic of pots, but usually linear could be used with good results.
Some guys recommended 100K reverse log as Sustain.
I got more versions comming - small vero that will fit 1590B and classic tagboard for sure. Will post them later.
For beggining layout using big veroboard.
Here's nice review and samples.
http://retrotonejunkie.blogspot.com/201 ... otron.html
Enjoy!
Peace!
b
- Attachments
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- buzzotron_big_vero.pdf
- (55.81 KiB) Downloaded 124 times
Last edited by beedotman on 30 Jan 2013, 08:35, edited 2 times in total.
http://www.turretboard.org 4 life!
- beedotman
- Diode Debunker
Information
Sme pics and gut shot of first Buzzotron.
Truly beaufitul work!
Truly beaufitul work!
- Attachments
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- Buzz_01.JPG (73.92 KiB) Viewed 4465 times
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- Buzz_04.JPG (79.53 KiB) Viewed 4465 times
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- Buzz_07.JPG (66.75 KiB) Viewed 4465 times
http://www.turretboard.org 4 life!
- beedotman
- Diode Debunker
Information
And here's another gut shot of red unit (second one) with shown 33K in output section instead standard 10K.
Resistor on Balance pot increased to 27K.
Resistor on Balance pot increased to 27K.
http://www.turretboard.org 4 life!
- roseblood11
- Tube Twister
Great work!
What about a small version with negative ground and npn transistors? Would be really useful... 2n1302 work great to replace nkt213 and they are easily available.
What about a small version with negative ground and npn transistors? Would be really useful... 2n1302 work great to replace nkt213 and they are easily available.
- beedotman
- Diode Debunker
Information
No problem. Will post later today!roseblood11 wrote:Great work!
What about a small version with negative ground and npn transistors? Would be really useful... 2n1302 work great to replace nkt213 and they are easily available.
http://www.turretboard.org 4 life!
- beedotman
- Diode Debunker
Information
OK, here it is. Three varations of the same layout (based on D*A*M Fuzz Sound Jr BTW...).
One negative, and two positive layouts with few different component sizes. As filtering 47uF cap can be used radial type easily.
Trannies could be mounted using sockets, so it should be easy to find best sounding trio
Peace!
One negative, and two positive layouts with few different component sizes. As filtering 47uF cap can be used radial type easily.
Trannies could be mounted using sockets, so it should be easy to find best sounding trio
Peace!
- Attachments
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- buzzotron_small_vero_negative.pdf
- (54.33 KiB) Downloaded 91 times
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- buzzotron_small_vero_positive.pdf
- (56.09 KiB) Downloaded 90 times
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- buzzotron_small_vero_positive_2.pdf
- (56.05 KiB) Downloaded 89 times
http://www.turretboard.org 4 life!
- beedotman
- Diode Debunker
Information
Just last one. I promise!
This one is for WIMA or Panasonic film caps with 5mm raster.
This one is for WIMA or Panasonic film caps with 5mm raster.
- Attachments
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- buzzotron_small_vero_positive_3.pdf
- (55.96 KiB) Downloaded 98 times
http://www.turretboard.org 4 life!
- beedotman
- Diode Debunker
Information
Three minutes in MS Paint using Madbean's Bumblebee schemtic
Changes vs. Buzzaround/Bumblebee in red.
Changes vs. Buzzaround/Bumblebee in red.
http://www.turretboard.org 4 life!
- beedotman
- Diode Debunker
Information
- beedotman
- Diode Debunker
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- phibes
- Transistor Tuner
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Is that a pedalenclosures Prism enclosure? If so, that's the first time I've seen a finished build look smokin!
GuitarlCarl - "TGP = The Gear Polishers"
Ken
Ken
- beedotman
- Diode Debunker
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I think so, but it those bigger ones -Prism II are not made anymore unfortunatelyphibes wrote:Is that a pedalenclosures Prism enclosure? If so, that's the first time I've seen a finished build look smokin!
http://www.turretboard.org 4 life!
- mictester
- Old Solderhand
Information
Probably because they had a big stock of 2u2 capacitors. It won't make any difference to the sound!
"Why is it humming?" "Because it doesn't know the words!"