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previous: mark durham cg, If you want to lower y... -- 5/16/2000 9:53 PM

Re: Transformer Boost/Buck Connections

5/16/2000 11:56 PM
CG	Re: Transformer Boost/Buck Connections Thanks Mark, that 1.41 makes sense. That brings me up to 211 mA. If I leave the rectifier and/or heater winding unused I'm sure I won't have any heat problems. I checked out the article at GEO about bringing the line voltage down with the 12.6V, but my B+ is going to be close enough, so I won't be doing that. What I'm really after is more B+ current capability. I just figured that since the rectifier winding is rated at 15 VA and the heater at 31 VA, that adding them to the plate would increase the ammount of current I could draw. Being a beginner is fuuny because you don't understand all the "rules" yet and you have to try to imagine them up as best you can. Logic and analogies from other parts of your life can only get you so far, so sometimes you come up with pretty odd ideas. It just seemed logical that all the secondaries could be joined together into one big seccondary and rectified, and then you could draw the full VA rating of the transformer on that one seccondary. In my case that would be 186VA divided by 436.3V = 426mA ! But maybe drawing power through more wire in the transformer is worse heat-wise than sticking to the plate winding alone and leaving the others unused? I don't know... just trying to sort it all out in my head. -cg

5/16/2000 11:56 PM

Re: Transformer Boost/Buck Connections

Thanks Mark, that 1.41 makes sense. That brings me up to 211 mA. If I leave the rectifier and/or heater winding unused I'm sure I won't have any heat problems.

I checked out the article at GEO about bringing the line voltage down with the 12.6V, but my B+ is going to be close enough, so I won't be doing that. What I'm really after is more B+ current capability. I just figured that since the rectifier winding is rated at 15 VA and the heater at 31 VA, that adding them to the plate would increase the ammount of current I could draw. Being a beginner is fuuny because you don't understand all the "rules" yet and you have to try to imagine them up as best you can. Logic and analogies from other parts of your life can only get you so far, so sometimes you come up with pretty odd ideas.

It just seemed logical that all the secondaries could be joined together into one big seccondary and rectified, and then you could draw the full VA rating of the transformer on that one seccondary. In my case that would be 186VA divided by 436.3V = 426mA ! But maybe drawing power through more wire in the transformer is worse heat-wise than sticking to the plate winding alone and leaving the others unused? I don't know... just trying to sort it all out in my head. :-)

-cg

Replies:

Graywater CG - As you well know RG is our buc... -- 5/17/2000 12:36 PM