I'm just going with the flow ...... no use of being exclusive
bummer is when you can't get a part ..... and as long I can , I'm not fussy
bummer is when you can't get a part ..... and as long I can , I'm not fussy
Sorry if it asked before ...
- is there a german source for the „mounting kit“ for the THF?
- how hot can the THF run? Didn‘t find a datasheet that this contains, i‘m a fan of „hot“ amps. ;-)
Thanks!
- is there a german source for the „mounting kit“ for the THF?
- how hot can the THF run? Didn‘t find a datasheet that this contains, i‘m a fan of „hot“ amps. ;-)
Thanks!
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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BD13916STU has the Collector in the centre, is this correct?
are Bourns PV36 trimmers ok?
PV36Y101C01B00
After further inspection it looks like I need PV36W to fit board. Y is staggered.
So W is top, inline, 25turn, 2.5mm spacing.
are Bourns PV36 trimmers ok?
PV36Y101C01B00
After further inspection it looks like I need PV36W to fit board. Y is staggered.
So W is top, inline, 25turn, 2.5mm spacing.
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
Oh yeah
Fugly!
🙂
don't skimp on accolades ....... and more impressions
edit: I really don't measure resistors when packing ....... wakoo anyone who made them !!
Fugly!
🙂
don't skimp on accolades ....... and more impressions
edit: I really don't measure resistors when packing ....... wakoo anyone who made them !!
the only problem is that now I have too much gain with my tube pre (beloved) .... therefore I had to leave the Sissy to drive my equally beloved Lightspeed alone ..... I'm trying .... I'm afraid that I will have to give up my pre
There is an easy step down transformer option, you can use something like the Edcor PC 10k / 600. 🙂
the reconstruction of the acoustic scene is one of the most marvelous features in the Sissy ..... but it is one of the aspects.
there is detail .... air between the instruments, accurate timbre ... dynamic. Nothing is neglected
there is detail .... air between the instruments, accurate timbre ... dynamic. Nothing is neglected
great suggestion 😉. 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.