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 Post subject: Cathode resistor
PostPosted: Tue May 12, 2020 1:53 pm 
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Location: virginia
The data sheets don't have cathode resistor values anymore. 400 v on plate, what self bias cathode resistor for 6550?


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 Post subject: Re: Cathode resistor
PostPosted: Tue May 12, 2020 3:31 pm 
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The 6l6 setting is the 2 in parallel, giving 660 ohms. Shouldn't it be 250 or 200 ohms


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 Post subject: Re: Cathode resistor
PostPosted: Wed May 13, 2020 12:20 am 
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Location: Qualicum Beach, BC
750 ohms in parallel with 570 ohms is 323 ohms.


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 Post subject: Re: Cathode resistor
PostPosted: Thu May 21, 2020 1:38 pm 
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I have 368v on the plate of the 6550. Is that cool? I put a 200ohm resistor on the cathode.


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