[Hammarlund] Need HQ140 restoration help
Jim Pruitt
wa7duy at charter.net
Sat Dec 1 20:42:32 EST 2012
I recently acquired a very poor shape HQ140X from a friend. He bought it to
restore and cut open the filter cap and put new caps in it but went no
further. I now have to figure out how to get the filter cap back into one
piece but what I am looking for is advice on what is needed for this beast.
The previous owner had stored it in a barn or garage (from what I understand
from the person I got it from) and mice had used it for a bathroom. There
is a bad rust spot in the back middle top of the chassis and on the back
side (outside). I have sanded that spot but the rust appears to go pretty
deep. Also the front lip inside the chassis has white corrosion all the way
along it from mice urine (I assume). What should be used to remove the rust
and what should be used to protect the chassis so the rust does not return?
I am also unsure what to replace and what to keep. I started trying to
replace all resistors but there are only 2 that appear to be original. The
others look more like 60's vintage carbon and most are 5%. I have had
trouble finding replacement 1/2w resistors but found a few at Fry's
(although their selection is horrible) and did not get enough 2.2k. I also
wanted to replace the 1watt resistors. So far only 1 of the 5 or 6
resistors I have replaced has been out of spec. One of the 2.2k 1/2w
resistors was 4k. I would like to replace the old resistors but they are
the hard ones and I suspect that if the others were replaced before these
were not replaced because they are in a hard spot to replace. Does anyone
know of a good source for replacement 1/2w, 1w, and 2watt resistors and what
type should be used (carbon film, metal oxide, flameproof, etc)?
The paper caps are a no brainer and I am replacing those and the one loan
electrolytic but the question is the same, what should and should not be
replaced on general principals?
Thank you.
Jim Pruitt
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