mpmarino said:
poor ZM between crazy Yank and crazy Dutchie
anyway . .... that pcb haven't any mistake , at least not any in Oly's pattern ; mistakes were made on pcb vendor side....dunno , maybe just temp program glitch or something like that; it doesn't matter much, just because just 3 pcs are made,for prototyping.
in any case - that pcb is not good anymore,just because initial schmtc is not valid anymore, and pcbs were made for it ; there are few radical changes in schm, so pcb also need radical change .
also- my goal was to make Pumpkin with non- unobtaniumumumumumum bugs ; if you check - you'll probably find all parts in first Tobacco store ( say my hello to Harvey , anyway ).
I made both Pumpkin main and reg schematics published ( here, where else) ; I'll not share pcb patterns , just because I intent to became dreky Crez selling them ..........
(tip: rest of story can be concluded via PM)
jacco vermeulen said:
you lost me there............
mpmarino said:......................
none of those left here either!
what?
you at least saw Harvey?
anyway- J309/310 aren't rare ,at least in Europe
same for LM thingies
for little BC critters use whatever you have in drawer ........
so- my plan is to sell combos in which you can find these goodies:
pcb preamp channel - pcs 2
pcb ± 36V ser/shunt reg - pcs 2
J310 matched pair x 2 (so- 2 + 2)
BC546C matched pair x 2 (so- 2 + 2)
J310 (CCS for led string ) kom 2
LM336Z-5 - pcs 4
BF245C - pcs 4
all that ( or just ?! ) for 100E
in price is included worldwide shipping
pcbs - two sided ,blue stop lack ,white overlay
as I told ya before......... PM ..........
Magura said:
Vix married ?? My concolences
Magura
Zen Mod said:
July 1. was D-day..........
I was told not to worry, there are worse things than that ...
Then there is a joke: " You know, marriage is like a can, on top it is filled with honey, and then the rest is sh*t"
And a married guy replies: "Oh, I must have reversed the can when I opened it, I have not reached to the honey yet!"
Vix
Cascoded Current source
Sorry, what I meant was that you could cascode the main current source of your supershunt-reg. Since you have about 10 Volts across it (46 --> 36) you should have enough headroom to do so. This would substantially increase the bandwidth and the impedance of the CCS.
?
Sorry, what I meant was that you could cascode the main current source of your supershunt-reg. Since you have about 10 Volts across it (46 --> 36) you should have enough headroom to do so. This would substantially increase the bandwidth and the impedance of the CCS.
Re: Cascoded Current source
you're right , but with ~ 150mA per leg I was in situation to choose between even greater overkill or schematic not too much critical regarding parts .
nice bjt (easiest choice for lower element in cascode) is not easy to find for that current ............ or is it........ ?
really depends of type of CCS you choose
but- like I always see from various Papa's schmtcs ............ some things are nothing less than compromises, some things are more than good when they're "good enough"
MRupp said:
you're right , but with ~ 150mA per leg I was in situation to choose between even greater overkill or schematic not too much critical regarding parts .
nice bjt (easiest choice for lower element in cascode) is not easy to find for that current ............ or is it........ ?
really depends of type of CCS you choose
but- like I always see from various Papa's schmtcs ............ some things are nothing less than compromises, some things are more than good when they're "good enough"
Magura said:
My concolences
Being married myself, I'm here to tell you that if you get the right one the DIY stuff gets better, not worse.
Kids, on the other hand, can take a few hours out of your day.
It's my understanding that one of my JFET customers has daughters who help him with his projects. Perhaps I'll get to that point in a few years. For now, all the energy flows one way: Out of me and into the kids.
Grey
GRollins said:
but we know that you know that we know that you know that is in fact more than enough better than that.............
like a
........hehe- take it as purely graphical illustration , not as a sign of my religious blindness.... I don't have any ........ (blindness or religion ?
)
GRollins said:
edit: Yes, it's so true. I found that I'm most affected in that I now have great difficulty in learning something new outside of paying work. For example, I would love to teach myself to design a nice pcb layout. Prior to kids I'm sure it would have been fairly simple. But now, time is so fragmented and focus is so blurred, it's near impossible.