CRT Question - Old Calculator

There have been a lot of comments about this thread, all of which I appreciate. Here's some more information: -> There are definitely two pairs of wires going into the coils around the neck of the CRT. Both of these pairs of wires terminate on the circuit board that has the deflection amplifiers on it. -> The display is most definitely not raster-scanned, it is vector, though it is scanned in a regular pattern. The vectors are generated by sine-cosine waveforms. The display is drawn as digits circulate through the delay line, digit at a time, with offsets fed into D to A networks that are based on the register being displayed, and the digit within the register. -> The high voltage supply does not appear to have a flyback transformer, which, from what I understand in the various comments, is typically used in a regular raster scan environment. -> I can't read the model number of the CRT, as it is covered up with a glued-on rubber gasket that goes around the CRT to isolate it from the frame that holds the face of the CRT. The monitor was manufactured by Video Color Corp, of Inglewood, California. It appears to have yellow-orange phosphor based on color advertising photos of the calculator. -> The main power supply in the machine is linear. There is a large transformer, big rectifier diodes and computer-grade filter capacitors, and a circuit board with zener diodes, small-signal transistors, and some big power-transistors mounted externally to the board on big heatsinks. The +12, -12, and -30V supplies definitely come off of this circuit board, as well as one other voltage that I've not been able to identify as yet. (I know the other three voltages from nomenclature on the logic boards). deflection would be the likely candidate for this type of display. The coils around the tube, though, tend to indicate magnetic deflection. There have been those that indicate that the coils could have something to do with potentially aligning the display -- there do appear to be some adjustment potentiometers on the deflection board that involve centering and rotation of the display properly. Could the coils be involved in that? I would think that rotation of the display (to account for physical alignment issues with the tube) would be difficult to do through the logic, so perhaps these coils are used to do this? The mounting of the CRT isn't very well-suited to adjusting the rotation of the CRT. Centering (vert & horiz) could be done by simple adding/subtracting horizontal and vertical potentials to the deflection to move the display up/down or right/left. Based on what I have read here: -> If the high voltage for the CRT is generated through use of an oscillator and diode/capacitor doubler circuitry, then it would probably be OK to run it without the CRT connected to anything (other than the HV connector), other than to make sure that the earth grounds for the CRT are in place to prevent a charge buildup and uncontrolled discharge (the grounds are in place and secure). -> Since there appears to be no switching aspects to the power supply (other than possibly as mentioned above for the high potential supply), running it with no load on the supplies shouldn't cause any damage. For testing purposes, I will probably fashion some dummy loads out of automobile lighting bulbs to put some load on the supplies to make sure that they are regulating properly, and to check ripple levels. I'm going to go ahead and try powering it up with everything disconnected by the HV connection to the CRT, and hope for the best. For the benefit of those that were interested, I'll post my results here. Thanks to all for the input on this. Rick Bensene