In any case no signs of harmonic noise in your build down to the deepest levels you could test. Congratulations.
Aloha! Finished rebuilding parts of a BA-3 preamp fed by a set of Ultrabibs! I'm having a repeat issue, though; when connected to the BA-3, D1,2 on the positive board and D3,4 on the negative overheat. These are brand-new boards and components as opposed to sets from my previous post and I'm at a loss to understand why this is happening.
-The BA-3 is biased; used my DC power supply to feed it.
-Diodes do not overheat when a dummy load is placed at the DC-out (120R, 13W resistor). Output is set to 25V via dummy load.
-Grounds are tied to IEC ground.
Thanks for your help!
-The BA-3 is biased; used my DC power supply to feed it.
-Diodes do not overheat when a dummy load is placed at the DC-out (120R, 13W resistor). Output is set to 25V via dummy load.
-Grounds are tied to IEC ground.
Thanks for your help!
Attachments
AnTek AS-1224: 100VA, 120VAC in, two 24VAC secondaries. And yes I'm using the correct secondaries lol!
Fascinating! Since you asked, I put a separate winding on each reg board and that seems to have fixed it! I had asked many many moons ago if I could use one transformer for two sets of bibs and was told that wouldn't be a problem. Obviously there were some details missing...sigh.
I have one set for the BA-3 and another for a Pearl 2. Can I use one set of windings for the two pos and the other for the negs? Or will I be back at a current-overdraw situation?
I owe you beer, thank you!
I have one set for the BA-3 and another for a Pearl 2. Can I use one set of windings for the two pos and the other for the negs? Or will I be back at a current-overdraw situation?
I owe you beer, thank you!
Enjoy your build!
You were actually shorting the diodes in the bridge rectifiers.
My advice is to get a separate trafo for the pearl. This way you keep away ground loops and other unwanted issues.
If desperate for one secondary per two same sections, one diode bridge shall be left unused. From C1 of one section continue to C1 of the other same polarity section. In other words, one AC feed one bridge then make a raw DC split.
That actually makes sense when thinking electrically. It's easy to think that AC in is AC in and forget that the rest of the circuit now sees what else is connected!