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Re: tube rectifiers [message #8330 is a reply to message #8317]

Sat, 17 July 2004 21:59

metasonix
Messages: 103
Registered: May 2009

Viscount

it is a problem for power tubes. If you apply plate voltage when the cathode is still cold, it can damage the cathode coating. It becomes a problem only above 400v plate voltage. Some of my references claim it's a phantom, because (supposedly) modern tubes have good cathode coatings. But current production tubes aren't as well made as 20-30 years ago, so it's better to be conservative in this area.

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[Message index]

		tube rectifiers By: rohit on Wed, 07 July 2004 17:31
		Re: tube rectifiers By: metasonix on Wed, 07 July 2004 23:17
		Re: tube rectifiers By: Manualblock on Thu, 08 July 2004 06:41
		Re: tube rectifiers By: metasonix on Thu, 08 July 2004 22:43
		Re: tube rectifiers By: rohit on Fri, 09 July 2004 17:34
		Re: tube rectifiers By: metasonix on Sat, 17 July 2004 21:59
		Re: tube rectifiers By: Manualblock on Fri, 09 July 2004 20:44
		Re: tube rectifiers By: metasonix on Sat, 10 July 2004 02:44
		Re: tube rectifiers By: Manualblock on Sat, 10 July 2004 12:39
		Re: tube rectifiers By: rohit on Thu, 08 July 2004 16:59

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