|Here is the restoration work (the
RE-CAPPING STAGE) underway.
|I leave the old capacitor lead in the
circuit. I don't usually unsolder it and
solder the new component in. What I do
is clean the lead (remove oxide) either
with a special fiberglass tip lead
cleaning pen (as in the picture) or I use
a knife and scrape the lead to remove
the old oxide. Then I make a loop in the
leads and crimp them together so the
connection is tight ..then solder.
In this old radio..I found some leads at
soldered junction points that were just
hanging in mid air. Not a good practice
and it doesn't look good.
I have some insulated anchor standoff
junctions that I use to secure these
I also check for shorts or loose particles
that could short out the circuitry.
|AFTER.. the cleaning, inspection, wax paper capacitor replacement and
spray cleaning the switch/variable capacitor with contact cleaner, tube
testing ..I DECIDED TO TRY THE SET OUT TO SEE IF IT WOULD
FUNCTION AT ALL. I powered the radio up and thought I heard some
light little crackles but no audio at all...not even a hum in the speaker.
GOOD NEWS IS..no smoke either. I inspected the underside and all the
components including the new capacitors I had inserted. All was well.
NOW ON TO THE NEXT STAGE..
|Part way through the restoration process and already I'm
running short of parts! The radio had quite a few 0.05 uf
capacitors. I only had a few in my junk box. I had quite a few
0.02 uf and 0.03 uf values so..I paralleled some values in
order to get the desired 0.05 uf.
NOTE TO SELF..BUY SOME MORE CAPACITORS!!!
FOR CANADIANS ..there is a place in Scarborough ..JUST
RADIOS dot com I think it is that sells lots of capacitors and
other goodies for radio restoration.
In the US there is quite a few good places to get parts.
I'll try and assemble a list of good links later.
I got my documentation, technical details and schematics
through http://www.nostalgiaair.org/ -- what a great site and
resource that is!!
I notice they also have a TUBE CROSS REFERENCE which is
((in case you need them!!)
otherwise..just use your
------>>>a free on line magazine -->PAGE 3 ---- CLICK HERE-->
|www.hamelectronicsmagazine....article from my old web
site www.earlandrews.com (re-worked July 30 2011_