65 silvertone

[timmy]

ok so i have another silvertone this one is a 65 and it works fine however i have a focus issue where when i turn it on as soon as the picture appears its sharp and clear but after about 30 seconds it gets blurry and out of focus and then after about a minute and a half its clear again and fine from that point on. i already replaced the rec stick , 66 meg, 6kv cap, and a 1 watt resistor, forgot what the value is but i changed it. is there anything else i should be looking at as a possible cause for this. i know it should not come on clear then go out of focus then clear up. its a though something warms up, the flyback is new and all the focus components except the focus coil.