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Old 10th August 2012, 11:07 PM   #21
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Originally Posted by imnewbie View Post
Shuguang 350C "carbon plates". Looks like 807 with 1.6 A filament current.

http://www.tubeampdoctor.com/images/File/350C.pdf

Here is it's datasheet. It has 400V plate voltage.

Are plate voltage and B+ same thing?
anode is the same as plate . This a 6l6 with it lower voltage plate or anode than a 807. If the price is good it a though for a 6l6 amp.
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Old 11th August 2012, 01:18 AM   #22
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Originally Posted by imnewbie View Post

Are plate voltage and B+ same thing?
Not always. In a cathode biased amp, the plate (anode)-to-cathode voltage is a bit less than B+ since the cathode R is dropping some volts. In a fixed bias setup, they are just about the same, as there is negligible cathode resistance to drop volts.

See Tubelab's comments in post 39 here:

Simple SE 6l6 tube types
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Old 11th August 2012, 01:21 PM   #23
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Originally Posted by boywonder View Post
Not always. In a cathode biased amp, the plate (anode)-to-cathode voltage is a bit less than B+ since the cathode R is dropping some volts. In a fixed bias setup, they are just about the same, as there is negligible cathode resistance to drop volts.

See Tubelab's comments in post 39 here:

Simple SE 6l6 tube types
True but based on my understanding of the question to view them as the same is the safe guide line .
I was answering it not as an absolute but as a good guide line for max voltage on this tube.
In this case 400volts the real plate voltage will be less because of your example and tubelab work.
I though the nuance of subtracting the cathode bias voltage would confuse the question as I understood it was asked. Regards
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Old 11th August 2012, 01:51 PM   #24
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Originally Posted by Triodethom View Post
True but based on my understanding of the question to view them as the same is the safe guide line .
I was answering it not as an absolute but as a good guide line for max voltage on this tube.
In this case 400volts the real plate voltage will be less because of your example and tubelab work.
I though the nuance of subtracting the cathode bias voltage would confuse the question as I understood it was asked. Regards

Triodethom: No worries, I was just attempting to further clarify things for imnewbie.
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Old 11th August 2012, 07:57 PM   #25
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Triodethom: No worries, I was just attempting to further clarify things for imnewbie.
Cool did not want to over load the newbies to soon .
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