--- In TekScopes@..., "kd8dey" <kd8dey@...> wrote:
I bought a 2235 on E-bay because it had the DMM/Freq counter and the digital display is bad.
I am wondering what other models have the DMM/counter BUT display on the scope itself?
The 2236 also had the same display. I believe it added delta time measurement, or something similar to the display.
Are you sure the display itself is bad? The device is a VFD. There were no real standards for these, so it will be nearly impossible to find a drop fit replacement. However, other than the glass breaking or the filament going open (which is not likely as they run very low power through the filiment), there is not much that can go wrong with them.
More likely the problem is in the drive circuit This display will use multiplexed digits, with the individual segments bussed between the same segment in all the digits. There is a small control grid used to select which digit is being active during its display window. Should be easy to troubleshoot. The voltages will be around 20-30 volts.
- Steve
