and the complete curcuit(+)
my first proto board build, and looks easy, but have to say, more tricky than I expected
Cool build
Cool build
thanks
got power on now
and I guess it works, since I have +15V from a 12V trafo
but no light from the LED
Attachments
Are you sure is well oriented?
as per schematic
but I don't understand how it's working
from what I can see in schematic, both ends of the LED are connected to +
Attachments
got it, thanks...it works
tricky, because those caps must be some kind of small wonders, since they seem to hold voltage almost indefinately
drained the caps with a reisistor....and he LED flashes nicely on power up
thought I wouldn't need a LED/res supply drain/bleeder, because of the LED in curcuit, but seems I have to mount one
will use for powr on indicator on front panel
ripped from a wallmount supply
tricky, because those caps must be some kind of small wonders, since they seem to hold voltage almost indefinately
drained the caps with a reisistor....and he LED flashes nicely on power up
thought I wouldn't need a LED/res supply drain/bleeder, because of the LED in curcuit, but seems I have to mount one
will use for powr on indicator on front panel
BTW, that's a super-stylish trafo there.
ripped from a wallmount supply
Attachments
Neat! You turn it into gold. Is that wood? At first I thought it may be something nifty and esoteric but now I realize it's just to hold the trafo in place? For the top part it looks like you drilled holes and cut it out with a band saw? I need to learn this sort of resourcefulness.
I am starting to cllect parts for the Kmultiplier I am going to use with the JG Paradise.
The Paradise uses shunt psu and draws 150mA on each positive and negative PSU, working at +-18V.
Due to availability I would like to use D45H11 power PNP instead of 2SA1930 for the positive kmultiplier.
For the negative one I have D44H11
Can I use those instead ?
Best regards
The Paradise uses shunt psu and draws 150mA on each positive and negative PSU, working at +-18V.
Due to availability I would like to use D45H11 power PNP instead of 2SA1930 for the positive kmultiplier.
For the negative one I have D44H11
Can I use those instead ?
Best regards
That transistor is a whole lot slower and I don't know about its quasisat behavior. I would have ordered some to test out but they were out of stock when I last had the chance. I tried some other outputs but the C5171/A1930 seem to be important to the specs of this design.
Ok... I will order some
Do these need to be heatsinked ?
For the other trannies I have the BC337/327.
I read your text describing the circuit but I am having difficulties following all parts purposes.
What is the purpose of the 820u cap ? Does it get multiplied as in a darlington C multiplier ?
Do these need to be heatsinked ?
For the other trannies I have the BC337/327.
I read your text describing the circuit but I am having difficulties following all parts purposes.
What is the purpose of the 820u cap ? Does it get multiplied as in a darlington C multiplier ?
Is that wood?
hey, I suppose you mean the brown trafo 'chassis' ? ... I think it's Pertinax
its hard pressed paper/glue, and very strong
I just cut with an ordinary metal handsaw, and dress with a file
edges are difficult, and splinter easily...could be better
the rest of the box is scrapped digital 'something', modified a bit, and some plywood
it's really way too much work for what it is, but whatever, its great fun
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