bulging resistors in a 38-116

[murf]

(04-19-2012 03:56 AM)SteveJB Wrote:  

(04-19-2012 03:38 AM)murf Wrote:  

(04-19-2012 03:18 AM)SteveJB Wrote:  What would cause a resistor to bulge out in the middle? I have several like this on a 38-116 (125) that I just started to restore. I haven't seen this before. Is it a manufacturing defect that occurs over time or a sign of overheating or some other trouble with the set?

Thanks,
Steve

My guess is that they must have gotten a little warm over the years.
I have found about 15 resistors out of tolerance on the 38-116 I am working on.
Did you notice if you have those 2 resistors I asked you about earlier?
I found in the sub chassis there is a really fine hair like wire attached to a cap that was not really connected too great.radio was cutting out due to this.
If you see that hair like wire,be extremely careful.
It is kind of buried in the middle section of the sub chassis.
Good luck with your restore.
These are a bugger to work on.
murf

Hi Murf,

I haven't seen that wire yet, but I do have a code 125. Do you mean two caps or resistors? I can't find that thread, but I do have one cap buried in the back of the sub chassis, looks like a .05.

Maybe it would be a good idea to show some pics. This weekend i'll have more time for that. I am just starting on this so I haven't gotten too deep into it yet.
Steve

They are resistors #78 and 79 on the schematics.78 being a 70k and 79 being a 14k wirewound resistor.
I can only find the 79 on mine.
Thanks
murf