BOM unchanged, ZM? Could you modify the first post in order to sticky the schematic and the BOM? Thanks
no such changes, practically just swapped Edcor pins 5 & 7, in circuit
BOM?
who needs stinkin' BOM, make your own
BOM?
who needs stinkin' BOM, make your own
Hi All,
I am more or less coming to the point of firing up this build. Just waiting on some trim pot to replace the ones I ordered with the incorrect adjuster placement.
But with this one I am a bit more concerned about blowing it up as I have with a few of the projects on the first go. As parts are getting harder and harder to get mistakes take a lot of time to recover from.
The question here is about the wiring of the transformer to the board. The transformer is a Toroidy 230v/30va/2x18v and I am a bit confused about the correct wiring here. Should it go as such -> BLK-AC1 / BLK-CT / RED-CT /RED-AC2?
Also If anyone sees anything stupid I may have done please do not hesitate to criticize.
I am more or less coming to the point of firing up this build. Just waiting on some trim pot to replace the ones I ordered with the incorrect adjuster placement.
But with this one I am a bit more concerned about blowing it up as I have with a few of the projects on the first go. As parts are getting harder and harder to get mistakes take a lot of time to recover from.
The question here is about the wiring of the transformer to the board. The transformer is a Toroidy 230v/30va/2x18v and I am a bit confused about the correct wiring here. Should it go as such -> BLK-AC1 / BLK-CT / RED-CT /RED-AC2?
Also If anyone sees anything stupid I may have done please do not hesitate to criticize.
Attachments
Here it is:
http://img.toroidy.pl/kk_eng/TS30.pdf
Thank you in advance!
Just noticed there are no colour codes on that datasheet...
As per the sticker on the transformer:
Pri: 230v blue-blue
"0" green-yellow
Sec: 2x 18 black-black/red-red
http://img.toroidy.pl/kk_eng/TS30.pdf
Thank you in advance!
Just noticed there are no colour codes on that datasheet...
As per the sticker on the transformer:
Pri: 230v blue-blue
"0" green-yellow
Sec: 2x 18 black-black/red-red
Last edited:
Note that the order of the secondary wires is important. I think it goes like this - looking at the tranformer from the sticker side:
BLK - start of the winding
BLK - end of the winding
RED - start of the winding
RED - end of the winding
in any case, you need to connect it to have center tapped 36V winding, written often as 36Vct
so, it'll be:
BLK - goes to AC1
BLK+RED - goes to CT
RED - hoes to AC2
now, phasing (befor connecting to pcb) is easypeasy - this will help (left side of sketch is applicable for your needs):
so, it'll be:
BLK - goes to AC1
BLK+RED - goes to CT
RED - hoes to AC2
now, phasing (befor connecting to pcb) is easypeasy - this will help (left side of sketch is applicable for your needs):
Attachments
Hi Fellas,
Is there a preferred Idss range for the K170/J74 JFET’s in Iron Pre? I apologize if it was previously mentioned and I missed it.
Is there a preferred Idss range for the K170/J74 JFET’s in Iron Pre? I apologize if it was previously mentioned and I missed it.
As usual things did not go without issue. I finally got all the parts in but must have made some mistake somewhere on the V- side of the regulator. C4 was not happy and let out some smoke and M2 got very hot very quickly...that said I did have the DMM on during startup and there was about -11.38v during this event. Can anyone point in a direction to start trouble shooting this?
how to help without data?
pics please
usual routine - check proper placement and values of all parts
that includes orientation of parts, too
proper transistor in proper place etc.
pics please
usual routine - check proper placement and values of all parts
that includes orientation of parts, too
proper transistor in proper place etc.
what issues with R21/22?
I mean - they're designated as 8K2 but anything from 4K7 to 10K will work
I mean - they're designated as 8K2 but anything from 4K7 to 10K will work