you can buy nice and suprisingly cheap Keratherm (same as T0-247 pads) sheets at conrad.de ...
regarding isolation bushings for M4 ... that's tricky - I didn't found them at usual suppliers of electronic goods , but I hope you know your local situation much better than I know it
aha - THF temp ....... presuming it's on same heatsink with mosfet , or at least same side , as in Modushop 400deep (which is actually having two sinks per side ...... which is zero/nada/zilch/not problem) ....... you'll always taking care of mosfet while THF will be cozy , doing nothing , bored , calm , sleeping ....
and it will be exactly right temp for your amp
shortly - either ignore it or consider it as just another mosfet
regarding isolation bushings for M4 ... that's tricky - I didn't found them at usual suppliers of electronic goods , but I hope you know your local situation much better than I know it
aha - THF temp ....... presuming it's on same heatsink with mosfet , or at least same side , as in Modushop 400deep (which is actually having two sinks per side ...... which is zero/nada/zilch/not problem) ....... you'll always taking care of mosfet while THF will be cozy , doing nothing , bored , calm , sleeping ....
and it will be exactly right temp for your amp
shortly - either ignore it or consider it as just another mosfet
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I'll keep this short......
What BJT's are needed for #1 kit?
Whats the hole spacing for the capacitors. Im guessing 2mm, 5mm, 22.5mm?
C1,2,4 are all 10uf but listed at different voltages is there a reason?
Whats the best format to share a BOM for other greedy boys?
I'm doing a Digikey list that I could share but it doesn't look pretty.
Heres a link to the Borbley WCF measurements if anyone is searching......
https://www.diyaudio.com/forums/pas...teroids-aka-m2-xa25-bstrd-12.html#post5507119
What BJT's are needed for #1 kit?
Whats the hole spacing for the capacitors. Im guessing 2mm, 5mm, 22.5mm?
C1,2,4 are all 10uf but listed at different voltages is there a reason?
Whats the best format to share a BOM for other greedy boys?
I'm doing a Digikey list that I could share but it doesn't look pretty.
Heres a link to the Borbley WCF measurements if anyone is searching......
https://www.diyaudio.com/forums/pas...teroids-aka-m2-xa25-bstrd-12.html#post5507119
aha
BD139 and BD140 critters - beta isn't critical ........ though more is always merrier ; so - choose 16 suffix
practically any decent T0-220 bjt will do , take care of pinout
10uF caps at cascodes (C1 and C2) , 16V is enough , no size difference even with higher voltages
you can use anything from 10 to 33uF ; even more doable , but then some ramp-up during powering up is possible ...... even if practically irrelevant
pitch for them - 2.5mm
C5 is Elna Silmic II .... marked as 10uF/16V ; I'm sending 22uF Elnas SIlmic II , dunno which voltage 16 or 25V (don't have any near me now) .... nothing critical
and , what's better than 10uF Silmic ? - logically - double sized Silmic
same pitch as above
C4 and C12 - 15mm pitch ; though - anyone getting #1 is getting these with pcbs , being pretty important position
CB is 5mm pitch
C11 ...... 3m3 - 16V enough ...... 2m2 being absolute minimum , 4m7 being OK , pitch 5mm ; you have nice Pana caps in that format
BOM - dunno - hate these things and always will hate them .......... ok , hate probably too strong word , but anyway - I'm always doing my own list , ditto from schematic ; that's way of learning new things , not just playing with puzzles
BD139 and BD140 critters - beta isn't critical ........ though more is always merrier ; so - choose 16 suffix
practically any decent T0-220 bjt will do , take care of pinout
10uF caps at cascodes (C1 and C2) , 16V is enough , no size difference even with higher voltages
you can use anything from 10 to 33uF ; even more doable , but then some ramp-up during powering up is possible ...... even if practically irrelevant
pitch for them - 2.5mm
C5 is Elna Silmic II .... marked as 10uF/16V ; I'm sending 22uF Elnas SIlmic II , dunno which voltage 16 or 25V (don't have any near me now) .... nothing critical
and , what's better than 10uF Silmic ? - logically - double sized Silmic
same pitch as above
C4 and C12 - 15mm pitch ; though - anyone getting #1 is getting these with pcbs , being pretty important position
CB is 5mm pitch
C11 ...... 3m3 - 16V enough ...... 2m2 being absolute minimum , 4m7 being OK , pitch 5mm ; you have nice Pana caps in that format
BOM - dunno - hate these things and always will hate them .......... ok , hate probably too strong word , but anyway - I'm always doing my own list , ditto from schematic ; that's way of learning new things , not just playing with puzzles
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partial BOM or at least a few part #
are Bourns PV36 trimmers ok?
PV36Y101C01B00
BD13916STU. Q1
BD14016STU. Q2
RFS-25V220MF3#5. this is a 2.5mm pitch. C1,2,5
UKW1C332MHD. 5mm C11
1N5237B
TPC817C C9G. OK2
1N4148
LM336Z25. VR1
MKS2C032201B00JSC9. CB
FKP2C006801D00HSSD. C3
SPC02SVGN-RC. Jumper
are Bourns PV36 trimmers ok?
PV36Y101C01B00
BD13916STU. Q1
BD14016STU. Q2
RFS-25V220MF3#5. this is a 2.5mm pitch. C1,2,5
UKW1C332MHD. 5mm C11
1N5237B
TPC817C C9G. OK2
1N4148
LM336Z25. VR1
MKS2C032201B00JSC9. CB
FKP2C006801D00HSSD. C3
SPC02SVGN-RC. Jumper
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@ZM,
Yes, that's not the problem, enough at home.
Ok, will take a deep look and when not the i must go to the lathe ... but they are so small.
Ok, that was what i thought ..will use my test enclosure 3U/400mm ... if Papa Nelson hand test i can't do => Babysitter
BD139
BD140
that's all you need to know
if you want to know more , find their datasheet and read ....
edit:
consider "T0-220" mumbling of old fart .....
BD 139/40 are in T0-126 case , and what I meant but wrote clumsy - you can use there ant decent bjt part , in T0-126 and T0-220 , taking care of pinout ...... and polarity , of course
BD140
that's all you need to know
if you want to know more , find their datasheet and read ....
edit:
consider "T0-220" mumbling of old fart .....
BD 139/40 are in T0-126 case , and what I meant but wrote clumsy - you can use there ant decent bjt part , in T0-126 and T0-220 , taking care of pinout ...... and polarity , of course
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yup , BD - see attachment
that Bourns is OK
pins in line or staggered - who cares?
pcb pattern is in line , but you have small clips or tweezers , so you can form mid pin of staggered on - to be in line with two outer pins
just another thing less to worry about , if you already have to think about set screw needing to be on top
that Bourns is OK
pins in line or staggered - who cares?
pcb pattern is in line , but you have small clips or tweezers , so you can form mid pin of staggered on - to be in line with two outer pins
just another thing less to worry about , if you already have to think about set screw needing to be on top
Attachments
did a little warm up soldering and put the B1 nutube buffer together last night - now have a spread of notes and lots of little packets with everything clearly marked.
No offense to the "factory" but I measured all resistors to make sure sure coffee was working for the Majestic ZM, mighty is for sissies
very well put together, I can only begin to imagine the effort of doing this for everyone who was interested
..dB
No offense to the "factory" but I measured all resistors to make sure sure coffee was working for the Majestic ZM, mighty is for sissies
very well put together, I can only begin to imagine the effort of doing this for everyone who was interested
..dB
Greetings to everyone and in particular to ZM.
I completed the construction of the SissySIT. Basically I did a dual mono in one case. trafos Toroidy 300VA (18v x2 sec.). Power supply with caps BC Vishay and Mundorf AG. Mosfet IRFP9140 and SIT SK180. Wiring with Teflon-coated 16AWG cables. Only problem when I ran the bias was that R8 of a channel strangely had a completely wrong value (150K instead of 1 ohm .... I have no explanation: I had 4 all wrapped together .... the wrong one is the only one that does not I tested with DMM) .... and clearly I had to replace it. after which everything is regular, offset included both in out and on the Jfet.
interstadio trafo with Edcor 600 / 15K.
The listening test left me extremely surprised by the very high quality of reproduction .... I think it's the best amp that I have passed through my hands. My previous reference was an OTL (with 6C33) in the Circlotron configuration built 15 years ago.
All my admiration for the work of ZenMod .... I received a great gift with this SissySIT. Building it has been relatively challenging but the result is seriously beyond my expectations.
I had also built the MOFO .... a nice amp. But with Sissy you definitely enter another world. I did not expect
I completed the construction of the SissySIT. Basically I did a dual mono in one case. trafos Toroidy 300VA (18v x2 sec.). Power supply with caps BC Vishay and Mundorf AG. Mosfet IRFP9140 and SIT SK180. Wiring with Teflon-coated 16AWG cables. Only problem when I ran the bias was that R8 of a channel strangely had a completely wrong value (150K instead of 1 ohm .... I have no explanation: I had 4 all wrapped together .... the wrong one is the only one that does not I tested with DMM) .... and clearly I had to replace it. after which everything is regular, offset included both in out and on the Jfet.
interstadio trafo with Edcor 600 / 15K.
The listening test left me extremely surprised by the very high quality of reproduction .... I think it's the best amp that I have passed through my hands. My previous reference was an OTL (with 6C33) in the Circlotron configuration built 15 years ago.
All my admiration for the work of ZenMod .... I received a great gift with this SissySIT. Building it has been relatively challenging but the result is seriously beyond my expectations.
I had also built the MOFO .... a nice amp. But with Sissy you definitely enter another world. I did not expect
Attachments
There is an easy step down transformer option, you can use something like the Edcor PC 10k / 600.
great suggestionThere is an easy step down transformer option, you can use something like the Edcor PC 10k / 600.
. Do you have any ideas about the Cinemags? cinemag 2810....it could go well ?...10k/600 4:1
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I have no direct experience with cinemags, but the spec shows that it should work well.