Monthly Archives: March, 2009
Gibson Echoplex
Roland Space Echo
WEM copycat
Binson Echorec
Blue coconut echoverb
The absolute beauty of tape based echo units lies in the fact that tape itself is analogue – moving the tape across a tape head polarizes the magnetic domains in the tape in proportion to the fluctuations in the audio signal. The granular nature of the magnetic material adds noise to the signal and because the magnetic characteristics of tape are not linear tape exhibits a characteristic hysteresis curve, which causes unwanted distortion of the signal. Any analog signal must theoretically have noise and a finite slew rate. It`s the imperfection in tape that makes the sound so delicious.
Whilst having a jam outside in the hot sun one year the copycat tape began to melt, decay and whither and this lead to some pretty crazy sounds coming through the p.a. and across the Surrey Hills. If you want to hear some Space Echo then maybe have a look at Adam Ants Table Talk from his unbelievably mind blowing 1979 release Dirk Wears White Sox. If you haven`t heard it buy it. It`s incredible IMHO.
Vacuum tubes?
…from outer space ?
NO, this is not a post about replacing the corrugated suction hose on your vacuum cleaner or hoover. If you have a valve (vacuum tube) guitar amplifier consider yourself lucky because according to conventional guitar wisdom your tone will be rocking !!!!!!!!

Paul has written in asking about the best practices in replacing the vacuum tubes in his amp.
Try and replace old tubes with the same models from a new manufacturer simply because these tubes were more than likely built into your amp in the first place and from a part of the amplifiers response, although experts can probably help with using different tubes to gain differing tone characteristics.

Here are two great places to buy replacement vacuum tubes and find out more, including how they work. The tube store have a really handy page that can help you choose your pre-amp gain factor through using differing tubes.
Best regards,
I`d like to post a video here in which Eric Clapton talks about Robert Johnson and plays “Stones in the Passway”. It`s a great place to start exploring what Robert Johnson has to offer and why he is who he is. It also illuminates the sheer technique, the impact of the unusual, that is often confused with something arcane, mythical, metaphysical, divine and otherworldly and more specifically in the blues with superstition, an encounter with the Devil. It`s also interesting to note that the cross tempo section Eric Clapton discusses is a technique that Johnny Winter has used in varying degrees throughout his career. Johnny Winter`s Progressive Blues Experiment album from 1968 is chock full of blues.
A longer version of this post is available on my blog www.jakeedwards.net. it`s worth reading if you want to begin your search to play blues from within a context of initiating an understanding of the history, the language and with some interesting links.

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