Happy New Year to one and all!
I finished Tubenit’s 5879 Blues Amp, and it sounds great, I love it....very nice clean sounds and very nice distortion at max gain. The only negatives are that the pentode preamp is noisier at max volume and gain than a triode (to be expected I suppose), and the 5879 goes microphonic and sometimes into feedback with all controls maxed w/o NFB (putting a finger on the tube will cease it). These are fairly inconsequential problems however.
Anyways, I was thinking of doing the “muchle$$ lite-n revibe” next (schematic attached), with a fender tone stack and an effects loop, and had a couple questions...
Has anyone built this amp, and does anyone have any suggestions about implementing it before I dive in?
Second, it looks like the “C” power node has five triodes on it...the PI, the paralleled reverb driver, and the tremolo...should I at least decouple the tremolo with another power node? Decouple both the reverb driver and tremolo? Also seems like there will be a lot of voltage drop across the 22k resistor with three 12AX7’s and the two 12AT7’s...should I reduce the resistor value and increase the cap value to increase headroom? would I be better off reconfiguring this filtering to a series arrangement with smaller intermediary resistor values?
I also have a generic question, the answer to which I have searched to no avail, and I know this is a very simple question...in this schematic (and many others) the plates of the first gain stage go into the grid of the following gain stage, then from that plate into the grid of the CF. I have read that the intervening volume control is -20DbV at 50%, but at max volume isn’t the first gain stage feeding the grid with many tens of AC volt swing, way beyond the 4 or so volts of headroom of a 12AX7? Seems like it would be way beyond distortion.
I know this is a simple question so apologies for being tedious.
Thank you for any help or opinions you can provide!
Topic: Muchle$$ Lite-N revibe power node questions (Read 1466 times)