Thanks. That lines up neatly with the opening paragraph on the Kmultiplier webpage (in my signature).
Morgan Jones volume 4 has some high voltage c multiplier in it . The circuit is not as forgotten as you thinks . your k-multiplifer is still a well done circuit non the less.
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
maybe I have too much voltage drop for the LED to function ?
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
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 ?
The 820u cap is multiplied like in a C-multiplier.
The C5171/A1930 should not need a heatsink at 150mA since they are dissipating only 300mW.
The C5171/A1930 should not need a heatsink at 150mA since they are dissipating only 300mW.
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 😛
Thanks for the pictures. I can't imagine using a hand saw and getting something to fit together as a box. If I knew of a way of a way to cut wood well enough for boxes I'd have my own sealed speakers probably.