😀 Yes, daily meditation and yoga are the secrets to becoming more Zen! 
😉
My internet level just went up by 10 points! I am an intermediate interneter now!
😉My internet level just went up by 10 points! I am an intermediate interneter now!
I finally started this build (R2) after lots of reading and first building the Sony VFET. Tnx to Papa and ZM!
avoid using gargantuan size resistors, where smaller ones are intended
in most cases that means thicker pin wires, which means unnecessary stressing metalisation of pad holes (vias)
I mean - if resistor legs/pins are going easy in, ignore me , but - if you need to persuade them to go in, it's just mess
in most cases that means thicker pin wires, which means unnecessary stressing metalisation of pad holes (vias)
I mean - if resistor legs/pins are going easy in, ignore me , but - if you need to persuade them to go in, it's just mess
Those were the only 100r I had in my stash. I believe you kit did only include 8 pieces of 100r resistors. They got in without any stress on the pads, still some wiggle room left. They are Dale metal film 1%, should be fine for R21 right? (As long as SIT is on shortest leash).
for SIT - you can put shortie on board (in place of resistor) and gate resistor on flying lead , near to SIT gate
however - nothing critical - gate resistor for SIT can be anything between 22R and 100R , and for mosfet anything between 100R and 470R
however - nothing critical - gate resistor for SIT can be anything between 22R and 100R , and for mosfet anything between 100R and 470R
Hum, do we have to populate the 100r for SIT in pcb AND flying 100r, or only one?
Schematic says both.
Schematic says both.
well, schematic ........ who drew that one?
it really isn't critical - having one (preferably flying), or both or just one on pcb ........ as long SIT is behaving and wires are short, pretty much no difference
one, flying - preference
if you did in any other way, just chill
it really isn't critical - having one (preferably flying), or both or just one on pcb ........ as long SIT is behaving and wires are short, pretty much no difference
one, flying - preference
if you did in any other way, just chill
Okay.
Won't blame Pa.
I'll remove the pcb ones some day.
I have a very small hum, will tidy the power wires.
Won't blame Pa.
I'll remove the pcb ones some day.
I have a very small hum, will tidy the power wires.
good enough, tried and confirmed
if you ever get Keratherm 86/82 sheet from conrad.de , replace it
if you ever get Keratherm 86/82 sheet from conrad.de , replace it
Well spotted! I still need to do the second one (clean it with rubbing alcohol).
And these need cleaning as well:
And these need cleaning as well:
Ok, I will refrain from trying to explain why I like the SissySIT so much but it is definitely the best/most special I have built so far. Oh and the best I have heard for that matter😱
I was wondering, with future P iterations coming, is it possible to "P" (active FE) my R.2 iron FE?
I was wondering, with future P iterations coming, is it possible to "P" (active FE) my R.2 iron FE?
I'm getting around to building my R1 SissySIT, however my current (Abbas Audio) DACs have hot outputs, around 4.5 Vrms (according to Mr. Abbas, i have not measured them), and i'd rather not throw most of the signal away by attenuation. Unsure of the output impedance of the DACs, i will try to find out (tube buffers on output). I guess i could wire the autoformer differently to lower the gain, very grateful for any suggestions.
with these xformers, it's really either 4x gain or 2x gain
2x gain would end with 9Vrms (OK, smidge lower, output not really being 1x, as all followers) , and that's 10W at output
4.5rms , with regular gain of 4x ( smidge less) should end with, say , 17Vrms, which is 36W ...... which Sissy can't reach of course
conclusion - you'll still need to attenuate, no free lunch
good thing in entire calculus is - majority of music (except modern crap) is rarely reaching exact 0db of digital level
2x gain would end with 9Vrms (OK, smidge lower, output not really being 1x, as all followers) , and that's 10W at output
4.5rms , with regular gain of 4x ( smidge less) should end with, say , 17Vrms, which is 36W ...... which Sissy can't reach of course
conclusion - you'll still need to attenuate, no free lunch
good thing in entire calculus is - majority of music (except modern crap) is rarely reaching exact 0db of digital level
