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    The preamp board wired up. This is the original preamp board. The circuit was adding a simple reverb circuit that totally ruined the sound of the amp so later we bypassed and removed this part of the circuit. The third socket from the left and its associated circuitry were removed.

    The preamp board wired up. This is the original preamp board. The circuit was adding a simple reverb circuit that totally ruined the sound of the amp so later we bypassed and removed this part of the circuit. The third socket from the left and its associated circuitry were removed.

Supro Amplifiers Are Back

I was browsing doing some research today when I stumbled upon a site claiming that Supro Amplifiers are back under construction again! Those who lust after that huge sound on the first two Led Zeppelin albums and some of Jimi Hendrixes studio stuff will be delighted to know that yes indeed they ARE back! Based out of NYC under the Absara Audio name it appears as though they have a few of the more popular amplifiers back in construction. I am excited to find one now and have been looking around online to find a distributor. Then of course I decided instead to see if they have a website up yet and of course they do! They have a pretty decent website too. It lists a lot of distributors here in the states.

Please go check them out at:
http://suprousa.com/

They have a Facebook presence as well at:
https://www.facebook.com/suprousa

THE CHAMP CBA-20807 1000 Watt AMPLIFIER by John Chambers

THE CHAMP CBA-20807 1000 Watt AMPLIFIER

I found this article on Hack-A-Day website. Some of you may recall my 100 watt custom monster amp post but even it in all its awesome glory is super small potatoes to this creation!

Johns work is exquisite and simple in design with thoughtful approaches to a variety of aspect to his amp. We are all anxiously awaiting part 3 of Johns missive into his marvelous amplifier containing schemtaics, results, and notes.

Johns website has a host of other useful information and ideas as well as how to’s and other designs both by him and other third party amp companies. Be sure to follow Johns progress as he seems to be a serious and well aged contender in the tube amp market and certainly better versed and more experienced than I!

The 1000 all tube Beastial Amplifier!

The 1000 all tube Beastial Amplifier!

Novachord 555 Project Begins With Baby Steps!

I found this article quite some time ago.
I wanted to share this again because I have been
considering how to emulate it accurately just using
555 and 556 timer chips along with various support
circuitry needed to recreate this behometh synth
from 1937! I am going to be using opamps and or
transconductance opamps and various transistors
and amplifier chips. All of the tonal generation
circuits and octave dividers and so on will be
from 556 and 555 chips! I have been thinking about
this project for almost 2 years but specifically
when Jeri Ellsworth and Chris Gammel held
The 555 Timer contest. Given the short time
frame of the project and slow shipping from
china I was not able to participate. But now I
have my chips and hopefully soon will find the
time to actually begin construction. I have been
doodling circuits on paper but have not had the
time to test board a few circuits together. It
certainly has been bugging me though and I need
to accomplish this monstrosity of a synth.

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

NOVACHORD RESTORATION PROJECT

by Phil Cirocco of CMS

Welcome to the NRP site. This site may drastically revise your perception of electronic music history.

The first commercially available synthesizer was designed by the Hammond Organ Company in 1938 and put into full production from 1938 to 1942. The Novachord is a gargantuan, all tube, 72 note polyphonic synthesizer with oscillators, filters, VCAs, envelope generators and even frequency dividers.

If you are skeptical about the Novachord being a true synthesizer, check out the sound clips near the bottom of the page.

I bought my Hammond Novachord around 10/2004 in Connecticut. After chatting with the few brave souls who tried to repair these beasts, I soon realized that replacement of all the passive components was necessary for reliable and stable operation of any Novachord. However, the sheer number of components and it’s complexity, make properly restoring a Novachord

a Herculean task.

Please don’t let this site lead you to believe that restoring one of these 500 pound monstrosities is anything close to easy. You will need tons of: time, resistors, capacitors, muscle, money, test equipment, patience, family members with patience, etc.

via Novachord Restoration Project.

The Plumber’s Pipe (Making PVC Flutes, Make a Flute)

In continuing on with my acoustic instruments creation thread I found this article about making flutes from commonly available PVC piping. Good luck, be careful and good flauting around!

Plastic plumbing pipe is nearly ideal for simple flutes. There’s no easier material to work with. Sanded clean and smooth, it’s attractive, requiring no finish. It’s waterproof, crack-proof, and nearly unbreakable. It’s fine acoustically, if you use the right dimensions. And once you develop a pattern, the pipe’s regularity allows a perfect flute every time.

via The Plumber’s Pipe (Making PVC Flutes, Make a Flute).

Here is another link to a different website with more great info about making your very own PVC flute!
via Make A PVC Flute

The Didgeridoo – How To Make A Didgeridoo

You might want to try making your own didgeridoo if you’re on a tight budget, if you want an inexpensive practice instrument, or if you just have fun making things. Figure 6-1 shows three didgeridoos made by the author — made of plastic pipe, copper pipe, and bamboo.

You can easily make a didgeridoo of your own, tuned to any key you want, with a few basic hand-tools and some inexpensive materials. For example, you can make a plastic pipe didgeridoo in a couple of hours for a total materials cost of less than $10 (US#, and without any tools more complex than a hacksaw. By the way, if you scoff completely at the idea of playing a plastic pipe, the Bloodwood CD by Alan Dargin & Michael Atherton #see the Discography page) contains a track of Mr. Dargin doing some rather amazing things with a 2 meter (6 foot) length of plastic electrical conduit. This track clearly demonstrates the playability of plastic pipe and other non-traditional didgeridoos, although that probably wasn’t what Mr. Dargin specifically had in mind.

via The Didgeridoo – How To Make A Didgeridoo.

Univibing the Electro-Harmonix Small-Stone (’97)

Sometime in the late 70’s Rick Onslow – Frank Marino’s tech at the time – said to me that you could modify pretty much any four stage phase-shifter to make it sound somewhat like a Univibe … the key word here is “somewhat” for I haven’t set them to lie exactly where a Vibe has them set, rather I’m playing with the 10:1 decade ratio in two parts … I decided to first try this idea out that concept on the Small-Stone OTA-based circuitry though I’ve more recently done it on Op-amp based circuits, and those are matched to the Vibe response … recall that well-behaved “studio” phase shifters have their all-pass filter stages set to an identical shift frequency by using the same shifter cap value throughout …

via Univibing the Electro-Harmonix Small-Stone (’97).

Make: Online | Krs – Hackerspace Electronics: From Nub to Ninja in Under a Year

Krs who learned electronics and went on to design electronic conference badges (and teaching others). She has the maker bug! “Krs – Hackerspace Electronics: From Nub to Ninja in Under a Year”….

via Make: Online | Krs – Hackerspace Electronics: From Nub to Ninja in Under a Year.

LM386 Altoids tin amp – Hack a Day

Hacker friend and cohort Dino Segovis is back again with the fifth installment in his “Hack a Week” series. This time around he has put together a 1/2 watt audio amplifier that would make for a great weekend project. He’s a big fan of the LM386 amplifier chip because it does so much in such a small package. Since it is so versatile, he used it as the centerpiece of his Altoids tin amplifier.

via LM386 Altoids tin amp – Hack a Day.

What it’s worth: Tube testers – Electronic Products

Here is a great article a friend turned me on to about the worth of ancient electric items…
This appears to be part of a series.
It covers Tube Testers in depth.
Catch the link here:
What it’s worth: Tube testers – Electronic Products.

555 Contest Winners Announced!

Last night @ChrisGammell and @JeriEllsworth announced the 555 contest winners… Somehow I missed the live announcements but HERE is the link to the contests homepage where the recorded video announcement and the prize winners list may be found.

My congrats to all the winners but especially to everyone involved. There were lots of great entries. The judges were:

The top prize “The Mims/Camenzind Prize” is a painting of a 555 chip donated by artist GnomeNCandle and it went to:

Tom Jenner for his – 555 Servo Controller

I personally did not have an entry due to month-long chinese parts shipment schedules combined with having to move 30 miles and a broken wrist. I was planning on entering a replica of the 1937 Hammond Novachord made completely and accurately out of 555 timer chips. I still am going to build this but at a much more leasurely pace than the month-long time limit of the contest. I will not profess that it will have near the depth and beauty of sounds and tones as the original but it should approximate it fairly closely with all of the same features. You may find details of this glorious instrument and its tale of reconstruction here!

100 Watt Custom Amplifier!

Marshall DSL 2000 gutted and rebuilt into a fiery ground shaking monster of an amplifier by Doug of Duo.Glassix. This amp combines charachteristics and circuts of a couple different well known amps. The resulting sound is that of Neal Youngs amplifier meets Zakk Wyldes amp and when the master volume is unleashed does not just thump your chest but rips your heart out and stomps on it! It has been called the meanest sounding amplifier on the face of the planet! I constructed an A/B/Y footpedal to take advantage of the parallel interactive channels (why is this feature not utilized more often). When channel 1 turned up all the way you get this sweet natural amp distortion while channel 2 if turned up 2/3rds of the way yeilds a deliciously warm woody clean jazzy sound that is to die for! The volume difference between the 2 channels is perfect for hitting that stinging solo tone while backing off the guitars volume cleans it up very nicely indeed. Some one asked for the schematics so here ya go! Enjoy!

————————————

From Marshall DSL 2000 ripped out by the guts!

This is the rectifier and power filtering circuitry.
It is pretty standard faire.
It uses a typical bridge rectifier with a 10H choke.
There are a pair of totem pole filters and a pair of Pi filters.
Also a negative bias supply circuit.
Also a 6.3 VAC heater circuit rated at 7 amps.

————————————

From Marshall DSL 2000 ripped out by the guts!

This is the power amplifier and phase splitter.
The output stage includes a pair of parallel speaker jacks.
There is a 4,8,16 ohm impedance selector swith.
Also a line out jack to connect straight to the board.
The Presence knob attenuates the high end sizzle.
This is a long tailed pair phase splitter.
It drives this quad of EL34’s into fire-breat​hing mode!

————————————

From Marshall DSL 2000 ripped out by the guts!

Here is where the magic is made.
This preamp has a pair of parallel triodes.
There is a bridge switch on the cathodes.
It induces interactiv​e vvolume controls on the channels.
Next is a cathode follower tone drive stage.
It and the tone stack are the same circuit used it a JTM45.
The master volume circuit is that of a typical JCM800 2203.
These two circuits together provide for some really amazing tones.

——————————-

Marshall DSL 2000 ripped out by the guts!

BC Rich

I owned this beautiful guitar for 8 days last summer. It was a very dark sounding guitar which does not suit my ears well. It was beautiful however and had 7 laminations of different exotic tonewoods for a beautiful sustaining tone. The electronics however left a lot to be desired. Definitely a heavy thrash metal guitar!

BC Rich

Danelectro BLT Slap Delay Possibilities Unlocked!

 I heavily modded this $25.00 pedal to add features available on much more expensive pedals. I increased the range of the mix knob only slightly to allow more clean iinto the mix to acheive a whole new color pallette. I brightened the tone of the delayed feed into the mix. I replaced an infernal little SMD resistor with a potetiometer to change the delay time. This BLT pedal provides a stock fixed delay to produce a slapback reverb effect. I can now manually sweep the delay time for some outrageously cool echoplex like effects with the delay knob being played with. This pedal is really cool and is cheap to mod. Most bang for the buck project I have done. May get a wah pedal housing in the future! Jimmy Page in a pedal anyone?

Danelectro BLT Slap Delay Possibilities Unlocked!

Marshall DSL 2000 gutted and turned into a firebreathing dragon!

Marshall DSL 2000 gutted and rebuilt into a fiery ground shaking monster of an amplifier by Doug of Duo.Glassix. This amp combines charachteristics and circuts of a couple different well known amps. The resulting sound is that of Neal Youngs amplifier meets Zakk Wyldes amp and when the master volume is unleashed does not just thump your chest but rips your heart out and stomps on it! It has been called the meanest sounding amplifier on the face of the planet! I constructed an A/B/Y footpedal to take advantage of the parallel interactive channels (why is this feature not utilized more often). When channel 1 turned up all the way you get this sweet natural amp distortion while channel 2 if turned up 2/3rds of the way yeilds a deliciously warm woody clean jazzy sound tat is to die for! The volume difference between the 2 channels is perfect for hitting that stinging solo tone while backing off the guitars volume cleans it up very nicely indeed.

 

Marshall DSL 2000 ripped out by the guts!

1959 Fender Tweed Deluxe 5E3 Build Gallery!

From 1959 Tweed Fender Deluxe 5E3

1959 Fender Tweed Deluxe 5E3 Head Clone I completed in February of 2008. Sounded Amazing. Created a custom A/B/Y footpedal for it and released the magic of interactive channels.

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