hammer Phaser to Phasefilter mod for Small Stone 1/13/103 4:34 am
This shows where to modify Francisco Pena's Piedrita layout (Small Stone Clone with CA3080s instead of CA3094) to turn it from a Small Stone Clone to a phasefilter clone.

Two mods are shown. One is forlifting the straight signal, which will provide a phaser/vibrato option for the Small Stone. The other turns the 3rd and 4th stage into lowpass filters instead of allpass.

(JUNE 02 - I have just found out that I put the X for where to cut at the wrong spot on the layout. The GIF file will be repaired and replaced, but has been removed for now. If you did this mod and found it absolutely useless, my humble apologies. Cutting where I indicated actually cancels the phase-shift signal, not the straight signal.)

hammer Chaos Fuzz 1/29/103 6:54 am
A simple, cheap over the top metal kind of fuzz. Very broad range of tones. Very simple perfboard build. Worth trying out if you have an evening to kill.

hammer Super Octaver 2/11/103 8:41 pm
This is a rarity - a single unit that provides octave up AND down.

As an octaver, it is decidedly a step or two up in terms of complexity, compared to most octave boxes. Although the schematic only indicates the three pitches (fundamental, octave up, octave down), it is potentially expandable to other intervals, though you need a bit of knowhow.

Some of the components may seem unfamiliar, but they are easily substituted for. The 1N60 diodes can be subbed with 1N34 or 1N270. The other diodes are easily replaced with 1N914/4148.

You will note the presence of a DC-to-DC converter, and FET-based switching.

The document is in Japanese, but the technical information is straightforward enough if your Kanji/Kana skills are not up to par.

As with anything on this site, by the time scans are cropped, tweaked, and printed out again, the scaling of the PCB layouts may not be precise. You may have to rescale to produce a Press-N-Peel layout.

The zip-file with all pages is 1.2meg in size, and scanned at 200dpi.

hammer T-tone mini-amp 3/27/103 11:23 pm
This is a mini-amp so unbelievably cute and coy, I couldn't resist posting it. You know how you're shopping for other things and you stumble across a potential enclosure and you think "This would be so cool"? Well, this is one of those times. The box was 59 cents, AND it came with teabags so I could relax with a "cuppa" once I was done.

hammer Nashville Tele mod 5/5/103 4:49 am
A closeup of a "Nashville Tele" mod that I did on a recently purchased Jay Turser Tele clone from their "Vintage Series." I suspect the "vintage" part consists of using a 3-barrel, rather than 6-barrel bridge, a skunk stripe on the neck, and a kind of more butterscotch colouring on the neck.
This one set me back $180 Canadian, has just about the worst fret finishing I've ever seen, and uses what is obviously garbage wood, but it is delightfully light and resonant.

I modded it by installing a homemade Strat pickup in the middle position, and cutting a pickguard to suit it. The pickup cutout on the pickguard is a little wider than I needed it but it isn't too ugly. I used some plastic sheeting I picked up at a model train store for $5. Machines very easily and buffs up nice too.

If you are pondering doing this yourself, note that middle pickup is straight rather than tilted and is centred between bridge and neck pickups at the treble side.

I wired it up to a 5-way switch that gives me neck, neck+bridge, bridge, bridge+middle, and middle pickups. So I get all the Tele settings, plus 2 of the Strat settings. It is a simple wiring trick that involves wiring up a 5-way switch as you normally would for a Strat, but reversing the leads for the bridge and middle pickups, so that the one gets soldered to where the other one usually goes. Takesd a little getting used to your "lead" pickup being in the middle switch position, but worth it to get Tele sparkle and twang and Strat cluck on the same guitar.

hammer Synthespin 5/5/103 8:50 pm
This is taken out of an older book on synthesizers and features primarily projects and modules from PAiA electronics in Oklahoma.

The Synthespin was one of their first effects projects and attempts to simulate a Leslie Speaker effect by modulating the centre frequency of a bandpass filter with an LFO. For whatever reasons, the designer John Simonton, was fond of using LM3900 quad Norton amplifiers where many would use op-amps nowadays. The 3900 is still available. It just throws people off when they see that diode stradding the inputs.

Note the use of voltage-control inputs. Quite advanced for its time, but typical of PAiA style.

hammer 5/9/103 8:44 pm