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In Reply to: RE: 5amp at 2.5volts if in parallel posted by Tre' on November 24, 2014 at 12:45:20
Are you saying if you wire the filaments of two 2A3s in series you will only draw 2.5 amps? Each one draws 2.5 amps doesn't it?
Follow Ups:
Yes.
All the parts in a series chain have the same amount of current flowing through them.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
So you could run six 2A3 filaments in series and only have to use a 2.5v/3A filament transformer?
No, 6 would take a 15 volt 2.5 amp transformer.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Very interesting. I guess its the same as with water, you need more pressure to maintain the same flow rate if you ad more hose length. Am I correct in thinking this is a result of I=E/R, where the R is increasing with each filament so you have to increase E to maintain I?
You've got it.
If you think in terms of watts, one tube...2.5 volts and 2.5 amps is 6.25 watts
Two tube in parallel....2.5 volts and 5 amps is 12.5 watts total, 6.25 per tube.
Two tube in series......5 volts (2.5 volt for each tube) 2.5 amps is 12.5 watts total, 6.25 watts per tube.
6 tubes in series.....15 volts (2.5 volts for each tube) 2.5 amps is 37.5 watts, 6.25 watts per tube.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Another one for the notebook. Thanks!
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