[Hallicrafters] update SX-101 resistors

[Jim Wilhite]

Bob if it works and continues to perform as it should, then don't change 
anything.  However do check after restoration and burn in time to be sure of 
the repairs.  Being as you are working for yourself, then how long you keep 
it on doesn't matter.  If you were restoring for another person the burn in 
time would be more limited.

In many cases the resistor changes are not going to make a significant 
change unless the circuit is operating marginally or are like the case I 
previously stated.  Just use you good judgment and ask any question you 
wish.  As for the resistors, if the carbon comp you are buying are meeting 
tolerance then by all means use them, but then again check them after you 
use the radio for a while.  Most likely those NOS carbon comp are near 50 
years old and are subject to change as the ones in your radio may be.

I try to do preventative maintenance on my equipment once per year.  I pull 
it out of the case and inspect it for any visual or changes in odor then do 
basic voltage checks, clean it then put it back in the case.  Just a habit 
from my land mobile days.

Jim
W5JO


-----Original Message----- 


Great advice Jim,

I do run all of my boat anchors on a regular basis. I fire them up
whether or not I put them on the air or not. I do that mainly just to
make sure they are still working. I have a couple I like better than the
others but love them all regardless. I was curious as to what kind of
resistors I should use to replace the old ones while I was checking out
the radio. We have a place in Boulder Colorado called "JB Saunders".
They have a very large supply of carbon composition resistors like the
ones in my radio. I have been buying them when needed and they all seem
to check out fine and work fine. So far anyway."Just Radios" is another
place I have bought numerous caps and resistors but they have a $25.00
minimum so JB Saunders works out well for small purchases. It would
really be nice to listen to a radio that has been restored and the owner
feels it is good as new. I do feel the radio I have is working great,
but still think it has room for improvement. I will see how it goes over
the next few weeks and maybe start picking up some new resistors and
slowly replace the old ones as time goes on. I know many of the guys I
speak with say "if it aint broke,dont fix it". I kinda agree, but after
replacing all of the caps in this radio and seeing how much better it
runs and sounds, I think a resistor overhaul would be fun and nice to
see how much improvement it shows. It isnt all that hard to do and
components that are nearly 50 years old have got to be wearing out if
not now, certainly in the near future. Im one of those guys that think
something works good, but I think it can work better. So, with that
said, we will see how the next few weeks go with this thing and I will
let you all know how it works out. BTW, would love to qso with some of
you sometime soon. I will admit, Im pretty much a cw guy, but do like to
get on phone occasionally just to brag that I am using 50 year old
equipment. It cause some nice pileups believe it or not.


Thanks-Bob-W0YBS