hi,
I designed this circuit in Multisim but there is a voltage drop in transformer. I think there is a problem with a transformer model.
can any one help please
here is the circuit reference : http://www.gtlab.net/gtlab2/filemanager/userpix/igor/low_anode_2.pdf
I built this circuit and it's working I used this transformer
I appreciate your help thanks
I designed this circuit in Multisim but there is a voltage drop in transformer. I think there is a problem with a transformer model.
can any one help please
here is the circuit reference : http://www.gtlab.net/gtlab2/filemanager/userpix/igor/low_anode_2.pdf
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
I built this circuit and it's working I used this transformer
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
I appreciate your help thanks
Last edited:
Actually, both your model's figures and your results are likely correct.
Your audio transformer probably has a primary DC resistance of around 300 ohms, so feeding 33mA through it will drop about 9 to 10 volts.
In the article, they use a big transformer, likely with a primary DC resistance around 30 ohms, so they will only drop 1 volt.
You solution could be to use their transformer, or feed a voltage of 37 or so volts to the top of the transformer you have. Either will give the near 27 volts on the anode.
Gary
Your audio transformer probably has a primary DC resistance of around 300 ohms, so feeding 33mA through it will drop about 9 to 10 volts.
In the article, they use a big transformer, likely with a primary DC resistance around 30 ohms, so they will only drop 1 volt.
You solution could be to use their transformer, or feed a voltage of 37 or so volts to the top of the transformer you have. Either will give the near 27 volts on the anode.
Gary
hello ,
your use mode " Penthode " or " Triode " ... ?
your build is limit power out to 8 Ohms up 1 W ... !
so possible use OPT 3.5 K / 8 Ohms for +/- 250 V= HV .
the idéa for possible build to mode " Triode " ...
http://www.diyaudio.com/forums/tubes-valves/254613-me-clone-proto-el-pl-504-a.html
your use mode " Penthode " or " Triode " ... ?
your build is limit power out to 8 Ohms up 1 W ... !
so possible use OPT 3.5 K / 8 Ohms for +/- 250 V= HV .
the idéa for possible build to mode " Triode " ...
http://www.diyaudio.com/forums/tubes-valves/254613-me-clone-proto-el-pl-504-a.html
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