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Old 3rd February 2015, 11:48 AM   #1
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Default PPP EL84 monoblocs: i knew then what i know now...

I started this project three or more years ago. I keep learning as i go along, so new problems come up all the time. i have matching Choke and PT and OT so i thought that a tube rectifier would be cool. I notice i have 5v 2 amp tap on the transformer. Well that limits my rectifiers and i also notice that my input tube
e88cc has a pretty demanding anode current. 15ma. I am really hoping that is for both triodes otherwise, by my often faulty calculations, i need 4 x 46ma for the anodes, 4 x 11ma for the grids of my EL84 (300v plate ultralinear) equals
228ma plus the 15ma for the e88cc gives me 243ma. If its 15 per triode then i am unsure what rectifier to use. I planned on GZ34, the heater currents good but with 250ma that seems to be cutting it close. I have 5AS4 but not enough heater current. I have also punched the hole and it will look stupid empty.
Can some one check my math. 4 EL84 and 1 ECC88. 300v Plate, ultralinear.
GZ34 rectifier. Gonna work???
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Old 3rd February 2015, 12:45 PM   #2
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there is no reason to tun ECC88 at 15 mA per anode, the linearity is great at 4..5 mA. Most designs use them in that area
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Old 4th February 2015, 01:35 AM   #3
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Old 4th February 2015, 01:47 AM   #4
cerrem is offline cerrem  United States
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What about a MV type 83 ....works with 5V ...
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