You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

Well only partially true. Open filament is the only sure test for a meter and maybe if the tube has a hard G-F short, but most G-F shorts more often than not, won’t show on a meter. This is because most G-F shorts only show up when the filament is heated and migrates ( moves) and touches the grid or vice versa. Nor will a meter pick up a gassy tube that will arc and blow up unprotected parts. You may be lucky to pick up a short with a meter if you affix the meter leads to the tube pins and slowly roll the tube on a flat surface. An analog meter works best.

[QUOTE="BlowinSmoke, post: 607001, member: 49983"] Well only partially true. Open filament is the only sure test for a meter and maybe if the tube has a hard G-F short, but most G-F shorts more often than not, won’t show on a meter. This is because most G-F shorts only show up when the filament is heated and migrates ( moves) and touches the grid or vice versa. Nor will a meter pick up a gassy tube that will arc and blow up unprotected parts. You may be lucky to pick up a short with a meter if you affix the meter leads to the tube pins and slowly roll the tube on a flat surface. An analog meter works best. [/QUOTE]

Top Bottom