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獅子口
Guest
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 Posted:
Fri Dec 03, 2004 6:11 pm Post subject:
Help: how to connect the filaments of a tube rectifier and a |
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Help: how to connect the filaments of a tube rectifier and a regulator in a
common souce?
The tubes EZ80 and 12AT7 are connected as follow:
http://www.geocities.com/cycheu/supply.gif
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John Stewart
Guest
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| Posted:
Fri Dec 03, 2004 11:07 pm Post subject:
Re: Help: how to connect the filaments of a tube rectifier a |
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"獅子口" wrote:
You don't need to put DC on the heaters of the tubes. That simply
wastes money & applies an extra load to your transformer due to
the harmonic currents presented by the heater rectifier & cap.
Just connect the heaters direct to the 6.3 VAC.
The circuit as shown will not regulate since you have not provided
a voltage reference.
Cheers, John Stewart |
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獅子口
Guest
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| Posted:
Sat Dec 04, 2004 6:12 am Post subject:
Re: Help: how to connect the filaments of a tube rectifier a |
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A OD3 will be connected for reference.
How about the heater? Should I connect one end of the 6.3V
to the ground or some voltage around 250VDC, or just let it floating?
"John Stewart" <jh.stewart@sympatico.ca> 撰寫於郵件新聞:41B0AB4B.9C81CFCE@sympatico.ca...
| Quote: | You don't need to put DC on the heaters of the tubes. That simply
wastes money & applies an extra load to your transformer due to
the harmonic currents presented by the heater rectifier & cap.
Just connect the heaters direct to the 6.3 VAC.
The circuit as shown will not regulate since you have not provided
a voltage reference.
Cheers, John Stewart |
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John Stewart
Guest
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| Posted:
Sat Dec 04, 2004 12:05 pm Post subject:
Re: Help: how to connect the filaments of a tube rectifier a |
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"獅子口" wrote:
| Quote: | A OD3 will be connected for reference.
How about the heater? Should I connect one end of the 6.3V
to the ground or some voltage around 250VDC, or just let it floating?
"John Stewart" <jh.stewart@sympatico.ca> 撰寫於郵件新聞:41B0AB4B.9C81CFCE@sympatico.ca...
You don't need to put DC on the heaters of the tubes. That simply
wastes money & applies an extra load to your transformer due to
the harmonic currents presented by the heater rectifier & cap.
Just connect the heaters direct to the 6.3 VAC.
The circuit as shown will not regulate since you have not provided
a voltage reference.
Cheers, John Stewart
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Heater-Cathode insulation rating for the EZ80/6V4 is 500 volts
so connect one side of the heater winding to the 12AT7 cathode.
Cheers, John Stewart |
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獅子口
Guest
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| Posted:
Mon Dec 06, 2004 6:14 am Post subject:
Re: Help: how to connect the filaments of a tube rectifier a |
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Thanks
"John Stewart" <jh.stewart@sympatico.ca> 撰寫於郵件新聞:41B19D0A.C47D134@sympatico.ca...
| Quote: | Heater-Cathode insulation rating for the EZ80/6V4 is 500 volts
so connect one side of the heater winding to the 12AT7 cathode.
Cheers, John Stewart |
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