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10-02-2006, 12:09 PM
| #1 |
| Junior Member Join Date: Sep 2006
Posts: 10
| Screen grit resistors
Stupid question, what are screen grit resistors? Thanks guys, Tom |
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10-02-2006, 03:03 PM
| #2 |
| Supporting Member  Join Date: May 2006 Location: Glasgow, Scotland
Posts: 2,413
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Unlike regular triode tubes (that have a plate, a grid and a cathode) power tubes tend to have an extra grid called the screen grid. It's charged with a high positive voltage, and designed to encourage the electrons to fly towards the plate and produce more power. But more often than not, they miss the plate and splatter back onto the screen grid. The screen resistor connects between the screen grid and the source of voltage, to stop it overheating if too many electrons happen to hit it.
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10-02-2006, 06:15 PM
| #3 |
| Junior Member Join Date: Sep 2006
Posts: 10
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Thanks alot mate, i have also now realised i spelt it wrong! Doh - but it was because i saw it spelt like that somwhere else! Cheers again, Tom |
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10-03-2006, 03:07 AM
| #4 |
| Senior Member Join Date: May 2006 Location: Lansing, Michigan, USA
Posts: 9,263
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And make sure never to get grit on your grid.
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| Thread | Thread Starter | Forum | Replies | Last Post |
| 5E7 Screen Grid Resistors? | JohnLochner | Guitar Amps | 7 | 09-03-2006 03:25 PM |
| Distorting CC resistors | dave////irongater | Theory & Design | 13 | 07-27-2006 08:35 AM |
| Significance of Screen Grids? | Justin Thomas | Theory & Design | 10 | 07-19-2006 03:10 PM |
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