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3rd March 2008, 11:12 AM
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#1 |
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diyAudio Member
Join Date: Jan 2005
Location: Philippines
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diodes before plate load
I have seen some circuits of tube amp and preamps, mostly from Japanese sites that uses a diode in between the PSU and the plate load.
Can somebody please explain to this tube newbie the purpose of the diode in that part of the circuit? |
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3rd March 2008, 01:21 PM
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#2 |
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R.I.P.
Join Date: Dec 2001
Location: Schaffhausen Switzerland
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There is absolutely NO reason to do this - unless there is a decoupling cap on the powersupply line that is after the diode - the diode then is acting as a "decoupler" so that ripple on the main supply from heavy load current demands doesn't affect the circuit being isolated.
Make sense? Regards, Allen |
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