The EHT stabiliser valves (tubes) used in early CTVs are inherently Xray generators. 25kV on the anode and up to 1mA of current means that Xrays will be generated. It's a question of suitable shielding.
In UK and Europe we came relatively late to colour so only first generation sets had a shunt stabiliser (Mullard PD500).
X radiation from CRTs was sorted out by the time we had colour. Correct shadowmask materials and enough glass to stop the remaining radiation.
People have used the PD500 in home built Xray apparatus:
http://www.kronjaeger.com/hv-old/xra...500/index.html