Will someone please sell me or trade for a double field ion trap assembly suitable for a 10BP4 crt. I have posted before in confusion of what is the right trap. My tube came with a single trap and the brightest raster was with the thing pushed all the way against the tube base. The 1949 set seemed to have had crt work when I got it and a single field trap was just laying on the chassis. It looked as if my troubles are picked up where someone else left off long ago. Someone told me that if I used no trap and got any raster at all that a newer gun had been used on a rebuilt tube that does not reqire ion trap. Well I got a raster without a trap but I am still skeptical. I dont want to ruin a good tube! I know the old manuals call for a double field ion trap and there has to be a reason. I see no evidence of an aluminised screen on my crt which I think is required for tubes with no trap. I feel like I should try a correct trap. Any advice or ion traps will be highly apreciated.