ZMEngrish is the best form of Englishmeans - put 220R gate resistor for output JFet
and , 33pF from tube anode to positive rail (practically across anode resistor)
or from anode to GND
that's that - sorta Papatongue translated to ZMEngrish
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means - put 220R gate resistor for output JFet
and , 33pF from tube anode to positive rail (practically across anode resistor)
or from anode to GND
that's that - sorta Papatongue translated to ZMEngrish
![]()
So to add 220 onto 1k resistor not swap?increasing value of gate stoppers is helping, not decreasing
try 33p (or more) to GND
or even to tube grid
I took the suggestion and finished the project. Board is 2.5"x1.25" and provides a 4-second delay which is ideal for my B1K board. If anyone is interested, the project is at this thread. (final design at post #3)having output cap in preamp, simplest and best way is to simply ground outputs with relay
meaning - relay simply shorting output to GND
I’d strongly recommend you consider returning that drek to the store and ask for a refund. If you made a quiet one used in the same environment, I can think of few other culprits than the Nutube itself. But of course, I may be wrong. If you can’t prove it is the tube, I imoe won’t expect much willingness to refund a dime.My board is in the garage atm, as i'm remodelling my apartment, and it's on pause trying to get rid of that hum. In the meantime, i'm trying to design a board with 2200uf caps, and mostly because i want it printed in black or purple. Here's whats done so far. If someone notices something off, it would be helpful to write up a comment. Thanks![]()