[Arran]

Thanks , Morzh.  Thought so, but have never seen one possibly till now.  schematic says 300 0hms, meter says 150 ohms.  Can't even tell what colors are on this thing.  Old dog bone.  Well it gets replaced anyway.  Thanks again.  Ed

 It sounds like this 300 ohm resistor of yours was overheating, probably due to excessive current draw, that can cause the value to drift downward sometimes if it doesn't burn out entirely. The reason that many of those "Dogbone" style resistors go up in value is because the connection between the resistive element, and the outside world, is often just a wire wrapped around the end of a carbon composition rod, if it gets a bit loose the joint builds up a greater resistance. It also does not help that the materials used in making the rods were often unstable themselves.
Regards
Arran