Ga-40 Clippage
Douglas as Guitars and Amps
Jun|16|2008
Here is a clip montage of different settings on the GA-40 amp. All recorded with my Reverend Roundhouse (LP copy) straight in and miked with an SM-57. No EQ or compression used.
Mountain Dew addicts unite!
Douglas as Uncategorized
Jun|12|2008
OK, I admit, I’m slightly addicted to mountain dew. They are trying out three new flavors all with Ginseng so I am excited. Having tried them all back to back, (That was a long night) I have concluded that my favorite is the strawberry-melon mashup called Supernova. I still prefer the original favor best but this one comes a close second, easily beating Code Red, and Livewire and other pretenders. All hail the dew…
UPDATE: Supernova is getting creamed in the voting except in California. Click the link to vote for it.
Gibson GA-40
Douglas as Guitars and Amps
Jun|12|2008
So I set out to find what all the fuss was over these amps. They are supposed Tweed Deluxe killers but the circuit seems unlike any fender I’ve seen. Instead of a 12AY7 pre tube on the Deluxe, the GA-40 uses a 5879 pentode, much like an EF86. The tremolo is unlike anything Fender had, using a 6SQ7 as the oscillator.
Fixing the Leslie’s passive crossover
Douglas as Guitars and Amps
Jun|12|2008
I did an overhaul of my leslie amp and thought that replacing the motor capacitor in the crossover would improve the sound as well has saving the upper driver from failure. The problem was the crossover used some very specific values to reach it’s 800hz crossover point. One side of the cap was 7.8uf and the other was 12.5uf. This was a primitive device. Could I restore it using modern parts. Read the rest of this entry »
Leslie pedal part II
Douglas as Guitars and Amps
Jun|12|2008
Sorry for the delay, I’ve been really busy now that summer has arrived. Here are the final shots of the DIY Leslie preamp pedal.
Here are all the parts in. This is before I blew up the transformer by connecting the center-tap while using a bridge rectifier.