[morzh]

Mike,

This one looks like it actually "burned" burned, not just heated over long time.


Steve,

It is interesting phenomenon. Yes, dogbones, 95% I encounter or so, they increase in value over time, from 20-50% to all the way 100-150%.

But.

There is that place in some sch, where those are used as the immediate bucking resistors/dividers right after the power supply, and they conduct some significant current. Those are often 1W or 2W larger and large dogbones.

Like these in my RCA140: (R5/6/7) at the top of this picture

   


Or in Philco 60 (and some other Philcos) R19, 22 and 24. 

   

I have always found these dropping in value, unlike the rest of the resistors within the same radio.