My friend pulled a bunch of parts out of a 2x 6L6 organ. I want to help him build his amp. My question is:
I'll leave the preamp section intact but, are there any changes I need to make to the power section of a standard JCM800 schematic.
I'll be leaving the fixed Bias. I checked and 6l6 should be biased at 23Watt (El34 - 20watts) ... so depending on the plate volatege I get I'll have to figure the current.
Are there any unforseen obstacles with this setup?
6L6 2204
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miguel
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Re: 6L6 2204
If my math is correct, 20 watts dissipation on an EL34 is 80%. A little on the hot side?chubs wrote:I checked and 6l6 should be biased at 23Watt (El34 - 20watts) ... so depending on the plate volatege I get I'll have to figure the current.
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chubs
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That is beside my point...
Appart from not needing to connect pins 1 & 8 then to ground
and
the fact that the Trannies were used with 6L6's and a 5u4 Rectifier
Do you see any other issues with having a 2204 preamp with 6l6 power amp?
Other question
50uf filter caps or 40uf ... for 6l6? Assuming I run SS rect.
Appart from not needing to connect pins 1 & 8 then to ground
and
the fact that the Trannies were used with 6L6's and a 5u4 Rectifier
Do you see any other issues with having a 2204 preamp with 6l6 power amp?
Other question
50uf filter caps or 40uf ... for 6l6? Assuming I run SS rect.
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jerrydyer
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I have that right now. 2204 with 6l6 power section. love it.
vids.
http://www.youtube.com/user/jerrydyer?feature=mhw4" onclick="window.open(this.href);return false;
http://www.dui-specialist.com" onclick="window.open(this.href);return false;
http://www.youtube.com/user/jerrydyer?feature=mhw4" onclick="window.open(this.href);return false;
http://www.dui-specialist.com" onclick="window.open(this.href);return false;
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jerrydyer
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you have to switch the 1k5watt for a 470ohm 5watt on the tubes those white ceramic guys (or brown tubular) I think I have a 47k bias res. I think I have them at 37ma not sure. Stock jmp 50 power trans and stock jmp 50 watt output trans. I havent really taken any time to do the correct math. I just get in the ballpark and go by ear.
vids.
http://www.youtube.com/user/jerrydyer?feature=mhw4" onclick="window.open(this.href);return false;
http://www.dui-specialist.com" onclick="window.open(this.href);return false;
http://www.youtube.com/user/jerrydyer?feature=mhw4" onclick="window.open(this.href);return false;
http://www.dui-specialist.com" onclick="window.open(this.href);return false;