Tube Amps / Music Electronics
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|11/6/2002 7:02 AM|
|manos||somebody said that....|
"""Leo used a Maestro Fuzztone on his steel, but it wouldn't work on cold concrete floors. When the transistors got too cold, they would shut down and refuse to pass any signal (if you don't believe that, try spraying the inside of one with freeze- spray while playing through it). """
|11/6/2002 2:39 PM|
Hard to believe.
Commercial grade transistors are typically spec'd to operate at 0 degrees C and lower (as low as -65 degrees C). Typical storage temperatures can be much lower.
Since we can expect that the pedal would be isolated from the floor by rubber feet, a cover plate, stand-offs and some FR4, the primary cold path would be by convection rather than conduction.
(The ambient air temperature).
Leo must have been playing outdoors in January - in Winnipeg!!
|11/6/2002 4:39 PM|
We're talking 'bout germanium transistors, first of all, the gain of which is highly temperature sensitive. Secondly, the fuzztone effect has a very primitive gate built in (which is basically an extra, unbiased ge transistor that the signal has to pass through); it's either on or off. And they're famously difficult to fix/tweek/build even in ideal conditions. Not hard to imagine the above story at all.
|11/6/2002 5:12 PM|
Your an idiot - read a data sheet.
|11/6/2002 8:33 PM|
I just want to solve the Maestro fuzz mystery.
And anonymous, if you want to abuse tell us your name.
|11/6/2002 11:44 PM|
1) The sensitivity of germanium fuzzes to temperature is well known, especially to the builders on this list who have been building fuzzes for many years now. Fuzz Faces have similar problems. The Maestro Fuzz really gates the signal, so a small amount of temperature change could make a difference. The issues germanium has with temperature is one of the reasons that the Moog synthesizer was made possible by the introduction of cheap silicon transistors, as silicon has a very predicable response to temperature that could be cancelled out with tempco resistors.
2) The proper phrase is "You're an idiot." Not "your."
|11/7/2002 12:09 AM|
"I think a good gift for the President would be a chocolate revolver. And since he is so busy, you'd probably have to run up to him real quick and give it to him." --Jack Handy
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