Fraid I don't get what is meant by a trippler modification in the last post.
I finished my work on her yesterday I replaced the 6.8 meg 1 watt resistor in my mod by taking four 6.8 meg 1 watt units and wireing the four as two paralel pairs efffectively making four 6.8 meg 1 wattters into two 3.4 meg 2 watters I then put these two in series with eachother and used them as a replacement for the 6.8 meg unit in my old mod. This restored the focus to working nicely.
While I was in there I took the time to examine the horizontal output tube. The first thing I noticed was that the yoke cable was touching that tube, and on closer examination it was clear that 3 of the wires had the insulation chared off at the contact point (a major short waiting to happen). So I electrical taped the bad spots and dressed the wire about two inches away from the tube. I could not get it farther as the cable is short and the chassis is laid out such that they practically force the wire to touch the tube.
I found out why the width was low it was indede the H output tube (type 6LB6 BTW) I had two spares one was labeled and the other was not, but the other tested good and had the same pinout so when the labeled one started glowing blue in the lower interior and causing a bad pin cusion I tried the other tube and it worked well. I was able to bring the width jumper back to the "normal" position from the "increase" position with plenty of overscan so I'm happy.
The output tube that was in there these past few months was testing at around 80 initally on my B&K 606, but quickly droping to 65 which is the upper border of the "?" zone. The new (well good used to be technical) one in there is rock solid at 92 so I now have a healthy tube in there.
I also had to relpace the original damper because to access where I made the mod I had to remove the tube and few mods and tests later I noticed that one of the damper pins stayed in the socket after I had pulled out the tube
