Half a bee Philosophically. . . Er sorry Its actually about ECC83 amps - diyAudio
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Old 12th May 2004, 06:37 PM   #1
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Default Half a bee Philosophically. . . Er sorry Its actually about ECC83 amps

OK! I'm making my own guitar amp, Using ECC83 Valves in the Pre-amp and a TDA7294V Power amp chip (100w 8 ohms.) I've been using marshall JTM45 and 1959 Schematics from http://www.marshallschematics.com so I know basically how to make a simple 2 channel pre-amp with gain. . . Well. . . Distortion. . . Or something. . . 3 band EQ, volume, etc on each channel. Basically, I found out that the ratings for the ECC83 heaters are 6.3v or 12.6v. Well, What i want to know is if I actually HAVE to feed 300v into the amp or whether I can run it as a lower voltage pre-amp. I'm not looking to beat the JCM800, Just make a decent sounding 100watt hybrid head. And dont tell me what I want to do is stupid, or to use all valve, or a diiferent chip, I know what I want to do ok? So just leave that lot alone ok
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Old 12th May 2004, 07:52 PM   #2
EC8010 is offline EC8010  United Kingdom
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Yes, you will need 300V, or so, for the HT. Bear in mind, though, that you don't need much current for ECC83, so it's not a major issue to duplicate the entire pre-amplifier from a classic guitar amplifer, and feed that to your chip.
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
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