Using two load resistors, say two 47K, and taking the signal off between them, gives you more gain, but less signal to the next stage? Could I just put a 100K in there and control signal with a 1M vol pot? Is split loading done to just fix the gain and signal out, when adjustment is not desired? I'm looking at all the Marshall 18W clones out there, deciding how flexible my first build should be. Thanks!
It's a simple voltage divider, depending on the resistor ratio of the divider you get some % of the gain available at the plate.
I assume this is for a guitar amplifier application, such an approach would rarely if ever be used for a hifi amplifier.
I assume this is for a guitar amplifier application, such an approach would rarely if ever be used for a hifi amplifier.
It's no different to have a normal volume control from chassis to grid, with the anode feed connected via a capacitor - as far as signal is concerned chassis and HT rails are the exact same thing.
The reason for the two resistors is simply as an attenuator, nothing else - by doing it in this way it saves a resistor.
Thanks, just wanted to be sure I understood what is was doing. Now, to figure out a master volume mod I found, that adds pots to the LTP. Can an MV really give you good tone and breakup at a reduced output?
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