Presenting thread here : https://www.diyaudio.com/forums/pass-labs/349248-singing-bush.html
Please , keep all tech. questions there.
Now , the Meat:
in case of kits , there are 3 elements :
A: Mu pcb with all parts , except mosfet puck and big output electrolytic ; which means - pcb , opto , trimpot , small elco , few MF resistors , handful of 3W MOX resistors , polycarbonat 1uF caps , zener ......... in short - everything , including wire ring and needle connectors (tip: I'm not crimping , but soldering them)
B: SIT gain pcb with all parts , except SIT , of course ; which means pcb , input JFets smd presoldered , reg , elcos , trimpots, Graetz, MFilms , small mosfet , bjts , zeners, LEDs , diodes ....... in short - everything , including wire ring and needle connectors (tip: I'm not crimping , but soldering them)
C: Schade gain pcb with all parts , except Mos puck and Iron ; which means pcb , input JFets smd presoldered , regs , elcos , trimpots, Graetz, MFilms , MOX, bjts , zeners, LEDs , diodes ............. in short - everything , including wire ring and needle connectors (tip: I'm not crimping , but soldering them)
so , 2 different kits (each being Stereo , of course) :
Option 1 : SIT Singing Bush = A+B (with Mu 3W MOX resistor set optimized for THF51/2SK182 as gain part, so 0R4 up and 0R2 down) ....... price 110E**
Option 2 : Schade Singing Bush = A+C (with 3W resistor set optimized for Mos Puck as gain part , so 0R2 both up and down) .......... price 110E**
Option 3 : Should I stay or Should I go SIT or Schade = A+B+C (with augmented 3W resistor set for Mu pcb - one 0R4 group and two 0R2 groups , which covers both SIT and Schade Singing Bush) ....... price 160E**
Option 1 down : just pcbs of Option 1 , no parts , smd JFets presoldered on gain pcb ....... price 70E**
Option 2 down : just pcbs of Option 2 , no parts , smd JFets presoldered on gain pcb ....... price 70E**
Option 3 down : just pcbs of Option 3 , no parts , smd JFets presoldered on gain pcbs ....... price 100E**
For any option above , if you don't want smd JFets ( you have your own stash) , shave 20E from final price
**Paypal fee and P&P , tracked for anywhere - included in said prices
'cause I still have some space in post , here is list of parts :
A - MU PCB:
********
Caps:
1uF MKC Philips - 12pcs
3300uF/16V Pana - 2pcs
Resistors:
MF 600mW - 6pcs
MOX 3W - 20pcs
Trimpot multiturn - 2pcs
Semis:
ZD 8V2 - 2pcs
4N35 - 2pcs
Misc:
ring wire conn.- 2pcs
needle wire conn.- 4pcs
PCB - 2pcs
B - SIT PCB:
*********
Caps:
1uF MKC Philips - 2pcs
10uF/25V Pana - 6pcs
470uF/35V Pana - 4pcs
1000uF/16V Pana - 2pcs
Resistors:
MF 600mW - 32pcs
Trimpot multiturn - 4pcs
Semis:
LED 3mm green - 10pcs
1N4148 - 4pcs
ZD8V2 - 2pcs
1N4001 - 2pcs
IRF510 - 2pcs
LM317T - 2pcs
2SK2145BL - 12pcs on board
Graetz DB1 - 2pcs
Misc:
ring wire conn.- 6pcs
heatsink for IRF – 2pcs
PCB - 2pcs
C - SCHADE PCB:
***********
Caps:
1uF MKC Philips - 2pcs
10uF/16V Pana -4pcs
470uF/35V Pana - 8pcs
1000uF/16V Pana - 6pcs
Resistors:
MF 600mW - 34pcs
MOX 3W - 2pcs
Trimpot multiturn - 6pcs
Semis:
2SK2145BL - 12pcs on board
ZD8V2 - 2pcs
BC517 - 2pcs
LM317T - 2pcs
LM337T - 2pcs
1N4001 - 4pcs
Graetz DB1 - 2pcs
Misc:
ring wire conn.- 6pcs
needle wire conn.- 4pcs
PCB - 2pcs
contact , either via PM , or directly >zenmodiyaudio@gmail.com<
Important: I resorted recently to making pcbs at our Chinese Brothers pcb factory , strictly from quality reasons ( getting tired expecting local fab to get that funny new machine doing Ping! , so I can finally see decent stop lack on my pcbs). Thus - things can be somewhat slower ........ but I wasn't fastest before , so there is no surprise ; slow, but sure ......
Please , keep all tech. questions there.
Now , the Meat:
in case of kits , there are 3 elements :
A: Mu pcb with all parts , except mosfet puck and big output electrolytic ; which means - pcb , opto , trimpot , small elco , few MF resistors , handful of 3W MOX resistors , polycarbonat 1uF caps , zener ......... in short - everything , including wire ring and needle connectors (tip: I'm not crimping , but soldering them)
B: SIT gain pcb with all parts , except SIT , of course ; which means pcb , input JFets smd presoldered , reg , elcos , trimpots, Graetz, MFilms , small mosfet , bjts , zeners, LEDs , diodes ....... in short - everything , including wire ring and needle connectors (tip: I'm not crimping , but soldering them)
C: Schade gain pcb with all parts , except Mos puck and Iron ; which means pcb , input JFets smd presoldered , regs , elcos , trimpots, Graetz, MFilms , MOX, bjts , zeners, LEDs , diodes ............. in short - everything , including wire ring and needle connectors (tip: I'm not crimping , but soldering them)
so , 2 different kits (each being Stereo , of course) :
Option 1 : SIT Singing Bush = A+B (with Mu 3W MOX resistor set optimized for THF51/2SK182 as gain part, so 0R4 up and 0R2 down) ....... price 110E**
Option 2 : Schade Singing Bush = A+C (with 3W resistor set optimized for Mos Puck as gain part , so 0R2 both up and down) .......... price 110E**
Option 3 : Should I stay or Should I go SIT or Schade = A+B+C (with augmented 3W resistor set for Mu pcb - one 0R4 group and two 0R2 groups , which covers both SIT and Schade Singing Bush) ....... price 160E**
Option 1 down : just pcbs of Option 1 , no parts , smd JFets presoldered on gain pcb ....... price 70E**
Option 2 down : just pcbs of Option 2 , no parts , smd JFets presoldered on gain pcb ....... price 70E**
Option 3 down : just pcbs of Option 3 , no parts , smd JFets presoldered on gain pcbs ....... price 100E**
For any option above , if you don't want smd JFets ( you have your own stash) , shave 20E from final price
**Paypal fee and P&P , tracked for anywhere - included in said prices
'cause I still have some space in post , here is list of parts :
A - MU PCB:
********
Caps:
1uF MKC Philips - 12pcs
3300uF/16V Pana - 2pcs
Resistors:
MF 600mW - 6pcs
MOX 3W - 20pcs
Trimpot multiturn - 2pcs
Semis:
ZD 8V2 - 2pcs
4N35 - 2pcs
Misc:
ring wire conn.- 2pcs
needle wire conn.- 4pcs
PCB - 2pcs
B - SIT PCB:
*********
Caps:
1uF MKC Philips - 2pcs
10uF/25V Pana - 6pcs
470uF/35V Pana - 4pcs
1000uF/16V Pana - 2pcs
Resistors:
MF 600mW - 32pcs
Trimpot multiturn - 4pcs
Semis:
LED 3mm green - 10pcs
1N4148 - 4pcs
ZD8V2 - 2pcs
1N4001 - 2pcs
IRF510 - 2pcs
LM317T - 2pcs
2SK2145BL - 12pcs on board
Graetz DB1 - 2pcs
Misc:
ring wire conn.- 6pcs
heatsink for IRF – 2pcs
PCB - 2pcs
C - SCHADE PCB:
***********
Caps:
1uF MKC Philips - 2pcs
10uF/16V Pana -4pcs
470uF/35V Pana - 8pcs
1000uF/16V Pana - 6pcs
Resistors:
MF 600mW - 34pcs
MOX 3W - 2pcs
Trimpot multiturn - 6pcs
Semis:
2SK2145BL - 12pcs on board
ZD8V2 - 2pcs
BC517 - 2pcs
LM317T - 2pcs
LM337T - 2pcs
1N4001 - 4pcs
Graetz DB1 - 2pcs
Misc:
ring wire conn.- 6pcs
needle wire conn.- 4pcs
PCB - 2pcs
contact , either via PM , or directly >zenmodiyaudio@gmail.com<
Important: I resorted recently to making pcbs at our Chinese Brothers pcb factory , strictly from quality reasons ( getting tired expecting local fab to get that funny new machine doing Ping! , so I can finally see decent stop lack on my pcbs). Thus - things can be somewhat slower ........ but I wasn't fastest before , so there is no surprise ; slow, but sure ......
I'm tempted to try this beast.
If I understand it correctly and 2SK77/2SK77B are nowhere available what is the best option from available SIT's to choose? THF51T or 2SK182ES? Any specific vgs to shoot for when ordering them?
Do I understand correctly, that shade version is not meant for those SIT's, but for some ixys current production FETs?
If I understand it correctly and 2SK77/2SK77B are nowhere available what is the best option from available SIT's to choose? THF51T or 2SK182ES? Any specific vgs to shoot for when ordering them?
Do I understand correctly, that shade version is not meant for those SIT's, but for some ixys current production FETs?
re-read origin thread again , everything explained in linked Papalecture
THF51 or 2SK182 or 2SK180 - whichever is easier to get
no particular range of Ugs , only - it is better to have them closest possible , if not thoroughly matched by Ugs ...... that way channels will be close in performance
THF51 or 2SK182 or 2SK180 - whichever is easier to get
no particular range of Ugs , only - it is better to have them closest possible , if not thoroughly matched by Ugs ...... that way channels will be close in performance
Hiatus, Kits shipments
Just replied today to Soren , and realized that I didn't wrote that "officially" , so:
Do not worry ....
Dunno what's situation with Corona in every particular country , but Serbia is, as majority of Eu, almost totally closed - no flights out and in , so I resume that Post Service isn't exactly functional
Better wait a little , than trying unnecessary ..... somehow I'm calmer if parts are on my shelf than rotting in some Cargo Storage ; in this moment I have 5 shipments to me rotting at Serbian Customs , and 3 on the way to Serbia ..... nobody knows where are they....go figure ......
Hiatus
stay well and be safe!
Just replied today to Soren , and realized that I didn't wrote that "officially" , so:
Do not worry ....
Dunno what's situation with Corona in every particular country , but Serbia is, as majority of Eu, almost totally closed - no flights out and in , so I resume that Post Service isn't exactly functional
Better wait a little , than trying unnecessary ..... somehow I'm calmer if parts are on my shelf than rotting in some Cargo Storage ; in this moment I have 5 shipments to me rotting at Serbian Customs , and 3 on the way to Serbia ..... nobody knows where are they....go figure ......
Hiatus
stay well and be safe!
ha!
was sitting in front of Post Office for 3 days, with bunch of bubbly envelopes, waiting in line to get inside
due to Covid (still not exactly over, will it be ever?), it's allowed just to one person to go inside in PO
dunno how is in big Towns, mine is small so PO is also small, working hours (just) to 14.00 each day
lines in front of PO are because of pension payments and also some Covid related help-payments, and ppl are funny looking at me - wtf. is in these envelopes
so, Friday, Sat and Mon are 3 days I tried , they say lines are going to vanish this week ( no more mentioned ) , while I'm gone out of town entire week, doing some resto work on pair of really big Tannoys
hope to stop testing both your and mine patience ...... hate to be buried in bunch of shipments I still have to make, bunch of emails and messages I can't catch with
besides that (not really relevant, just boring), got some back pain,wasn't careful enough while moving one big damn Tann box
so, in short, I'm ready, trembling in start block,just waiting to hear starting pistol
(I'm really trying to be one of Good Guys, even if not successful all the time)
was sitting in front of Post Office for 3 days, with bunch of bubbly envelopes, waiting in line to get inside
due to Covid (still not exactly over, will it be ever?), it's allowed just to one person to go inside in PO
dunno how is in big Towns, mine is small so PO is also small, working hours (just) to 14.00 each day
lines in front of PO are because of pension payments and also some Covid related help-payments, and ppl are funny looking at me - wtf. is in these envelopes
so, Friday, Sat and Mon are 3 days I tried , they say lines are going to vanish this week ( no more mentioned ) , while I'm gone out of town entire week, doing some resto work on pair of really big Tannoys
hope to stop testing both your and mine patience ...... hate to be buried in bunch of shipments I still have to make, bunch of emails and messages I can't catch with
besides that (not really relevant, just boring), got some back pain,wasn't careful enough while moving one big damn Tann box
so, in short, I'm ready, trembling in start block,just waiting to hear starting pistol
(I'm really trying to be one of Good Guys, even if not successful all the time)
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