From: Eric Webner 
Subject: Re: [drakelist] R4C xtal bank bad


Eric Webner  made an utterence to the drakelist gang
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Hi Joe,
 
Have you made any progress on your radio? I didn't see any responses on drakelist.
 
It seems the crystals are ok, so it must be a wire or more probably, a
switch contact. The wafer switches on these radios seem to corrode a bit,
with the metal parts turning black. You might be able to clean the rotary
switch contacts sufficiently with De-Oxit, but I used a more thorough
method on all the switches in my T-4XC. Check out
http://www.wb4hfn.com/DrakeArticles/CleaningSwitches/CleaningSwitches.htm
for details. 
 
BTW, this web site is very well done and you will want to explore the other
articles on it. Good luck.
 
73,
 
Eric KA8FAN

Joe Roth  wrote:

"Joe Roth" made an utterence to the drakelist gang
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I've added a lot of xtals to my R4C. I began to use position 11 which is now 
in the 3 (bottom most) row. The entire row for positions 11-15 will not 
work. The receiver acts as if the xtal sockets are empty. The xtal works 
fine in other positions. I've swapped all combinations around and I know 
there is a problem with the row. I looked at the obvious solder joints on 
the switch and traced the connections of 3 wires going to the underside of 
the chassis. Everything appears to be okay.
I now need to get in to it deeper and trace some lines with the VOM. Does 
anyone have suggestions to narrow things down?
TNX
Joe/N4ARI
www.n4ari.net


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Hi Joe,
 
Have you made any progress on your radio? I didn't see any
responses on drakelist.
 
It seems the crystals are ok, so it must be a wire or more
probably, a switch contact. The wafer switches on these radios seem to
corrode a bit, with the metal parts turning black. You might be able to
clean the rotary switch contacts sufficiently with De-Oxit, but I used a
more thorough method on all the switches in my T-4XC. Check out http://www.wb4hfn.com/DrakeArticles/CleaningSwitches/CleaningSwitches.htm for" target="new">http://www.wb4hfn.com/DrakeArticles/CleaningSwitches/CleaningSwitches.htm">http://www.wb4hfn.com/DrakeArticles/CleaningSwitches/CleaningSwitches.htm">http://www.wb4hfn.com/DrakeArticles/CleaningSwitches/CleaningSwitches.htm for
details. 
 
BTW, this web site is very well done and you will want to
explore the other articles on it. Good luck.
 
73,
 
Eric KA8FAN
Joe Roth
<n4ari{at}msn.com> wrote:
"Joe Roth"
made an utterence to the drakelist
gang----------------------------------------------------------------------I've
added a lot of xtals to my R4C. I began to use position 11 which is now
in the 3 (bottom most) row. The entire row for positions 11-15
will not work. The receiver acts as if the xtal sockets are
empty. The xtal works fine in other positions. I've swapped all
combinations around and I know there is a problem with the row. I
looked at the obvious solder joints on the switch and traced the
connections of 3 wires going to the underside of the chassis.
Everything appears 
---