The Singing Bush Tips 'n' Tricks, so even Cheerleader Girlie can build it ...
....OK , here it is
ORIGIN THREAD : The Singing Bush
First few posts with graphical info, then I'll write separate posts for both amps, explaining few details
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however , most important thing when starting, applicable for both amps:
be sure that trimpot in buffer negative rail (lower JFet group source) is set to max position, prior to first powering up - check that measuring across parallel 39R resistor - reading must be close to 28R
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another thing - remove that silly blue collar from needle wire terminal you got from me - either use heat gun or heat it with solder or lighter ...... then pull it
all wires need to be crimped then soldered in wire terminals, then heatshrinked, to look nice
///////// ( you can see from these slashes that I spent some time recently struggling with Arduino
)
for 2SK77B - lucky bstrdz having these - all 3W resistors in Mu part of amp - they are still 1R/3W , no change ........... Iq 3A2, output node or SIT Drain (what's easier to reach for measurement) set at approx U/2
///////////
edit 27.07.2020. - SIT Singing Bush startup procedure , post #29
....OK , here it is
ORIGIN THREAD : The Singing Bush
First few posts with graphical info, then I'll write separate posts for both amps, explaining few details
////////
however , most important thing when starting, applicable for both amps:
be sure that trimpot in buffer negative rail (lower JFet group source) is set to max position, prior to first powering up - check that measuring across parallel 39R resistor - reading must be close to 28R
/////////
another thing - remove that silly blue collar from needle wire terminal you got from me - either use heat gun or heat it with solder or lighter ...... then pull it
all wires need to be crimped then soldered in wire terminals, then heatshrinked, to look nice
///////// ( you can see from these slashes that I spent some time recently struggling with Arduino
)for 2SK77B - lucky bstrdz having these - all 3W resistors in Mu part of amp - they are still 1R/3W , no change ........... Iq 3A2, output node or SIT Drain (what's easier to reach for measurement) set at approx U/2
///////////
edit 27.07.2020. - SIT Singing Bush startup procedure , post #29
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