I have just taken delivery of a lovely little high voltage power supply unit that I stumbled upon recently.
The unit is made by the venerable Spellman conmpany of Hauppauge, NY and is designed for applications that require a variable voltage and variable current output with the specification 0-30KV/0-300uA. I do not have an immediate use for it but at £25 delivered, I could not resist it.
It appears very similar to the HV power supplies commonly found in high performance X-Ray systems and could be employed in that role, albeit within the 300uA current limit.
The joy of this unit is its compactness combined with ease of control. It requires a 24VDC supply and the V/I output is set using a control voltage range of 0-10V on the Vset and Iset control pins. The 0-10V range represents 0-100% of maximum output. Nice and simple. It also has the surprising capability of a 'HOT' switchable output polarity. That is to say its output can go from +30KV to -30KV in less than a second, under the control of the polarity select pin. Pretty neat capability
I removed the cover on the unit and it appears to be in great condition inside. The HT section is encapsulated in a silicon insulation as would be expected in a compact 30KV supply. I will not be delving into the encapsulated section and it is likely just a ferrite cored HV transformer and rectifier diode pack anyway.
The unit even came with its HV cable and special connector.... joy
Enjoy the pics, though sadly there is not a great deal to see in these units. Their true beauty is in their small size, ease of use and the many HV related applications to which they may be applied. Not bad for £25
I also attach the data sheet for those interested in the specs etc.
Aurora