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DIY HiFi Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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DIY HiFi Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: Re: MV Rectifiers - Ugh! posted by Derick on February 21, 2003 at 13:39:26:
I worked at Eimac between 1974-79 and I know their tubes quite well. One thing that concerns me; however, is that tubes such as the 75TL/H, 304TL/H, etc. are designed to operate at realatively high voltages (2000-3000 VDC). At 8 watts out I am sure that Josh is running them at lower voltages. I see in the photo that tubes are showing no "color". These tubes have no getter in them and impurities and small amounts of gas are "gettered" by the tube running at a minimum of a visually red hot plate and preferably a bright orange. The tubes are desihned to run this way. If run at lower plate voltages this gettering process does not occur and eventually the tube will go gassy.
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Follow Ups
- Gassy Tubes - Lance 21:08:10 02/21/03 (2)
- Re: Gassy Tubes - Ivan303 21:45:11 02/21/03 (1)
- Re: Gassy Tubes - Lance 22:11:02 02/21/03 (0)
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