[Hallicrafters] SX-100 Mk2

[WA1KBQ at aol.com]

Have you considered a good desoldering gun? Hakko 808 works very well right 
 out of the box, will pull a lot of solder and make disassembling circuits 
a  cinch. Heat soak time is minimized and point to point wiring can often  
be reassembled with original lead dress. Avoid brand-x cheapies also on the  
market, I have tried most of them. Goot is also a good tool but  they have a 
.028" diameter transfer tube which is too small for point  to point wiring 
and stop up quickly due to slag and debris. I drilled my  Goot's tube out to 
.040 so a Hakko 1mm push wire can be used which fixed that  problem. 
Smaller diameter push-wires don't work well and bend too easily rather  than clean 
the transfer tube. The Goot also takes longer to reach operating  
temperature so I moved it to teardown where it does not on-off-on  temperature cycle 
as much.
 
-Greg
 
 
In a message dated 1/7/2013 12:23:25 P.M. Eastern Standard Time,  
dhallam at knology.net writes:

Well, my  SX-100 Mk2 is on the bench.  I have installed a real line cord 
with  an under chassis fuse and AC bypass capacitors.  Now I am waiting 
for  the recap kit from Tom, N0JMY.  It appears that all the paper  
capacitors are CD Tiny Chiefs.  At least the filter capacitor can  isn't 
solidly soldered to the chassis and won't need a blow torch to get  it 
loose.  I've had a couple of HT-37's where it looked as if the  filter 
capacitor was the first thing installed and then completely  soldered to 
the steel chassis.  Trying to get enough heat to melt the  solder without 
destroying lots of other things was a real job.

All  of the sealing enamel on the adjustable coils and transformers 
appears  intact so I guess no one has done any fiddling around with the  
alignment.

I will start checking resistors while I wait for the  capacitors.  I see 
a couple of scorched  ones.

David
KW4DH

-- 
A democratic government is the only  one in which those who vote for a tax 
can escape the obligation to pay  it.
Alexis de  Tocqueville

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