- Favorite electron tube circuit? - 1 Update
- ADM-3A Wonky Until Warm - 1 Update
| Jon Elson <elson@pico-systems.com>: Jun 23 01:07PM -0500 root wrote: > I was looking through an old copy of Seely's book. My favorite tube > (on the basis of clever design) was the Phantastron. Really slick. Brilliant use of a tube designed for a different purpose. They were used as the ramp generator for horizontal sweep in oscilloscopes. Likely used in radars as well. Jon |
| Jon Elson <elson@pico-systems.com>: Jun 23 01:04PM -0500 Tom Lake wrote: > turn it off back on, the display is still fine as long as I don't let the > ADM cool off first. Does anyone know what the problem might be? What to > look for? Ohh, that's the exact signature of a bad elecrolytic cap in the vertical drive circuit of the monitor. Many monitors of that vintage had bipolar electrolytic caps in the vertical circuit. These may be hard to source, but you should be able to find a suitable replacement. Jon |
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