[ARC5] A hardly relaxing oscillator
Mike Hanz
aaf-radio-1 at aafradio.org
Tue Feb 3 07:59:52 EST 2015
Success! I've been looking a long time and finally found a term that
yields no results in google - "Almanox"! Must be the down-under
equivalent of Italian regional liqueurs - made within a 20 mile radius
of Brian's QTH...heh, heh...
A more widely available equivalent in North America might be Noalox or
Burndy's Penetrox, which *will* yield google results on this side of the
planet. But I think the difficulty here is in the two different forms
of the English language. Tweek (or tweak) - to me - means loosening the
screw counterclockwise a half turn or so and then retightening it to its
former tightness. Unless your shack is under an open cabana with a salt
spray environment, it's unlikely that you will need more. It will also
tell you whether there is potentially a need to do more - if there is a
white powder emanating from under the screw, some investigation is in
order.
If the screw head breaks off completely, you will *definitely* need to
do more...:-)
73,
- Mike KC4TOS
On 2/3/2015 5:20 AM, Brian wrote:
> Giving all the screws a little tweak may solve a present problem, by
> biting through an electrolytic corrosion cell that has developed
> between aluminium (chassis), steel (lock washer) and brass (screw). If
> you or your inheritors continue to give little tweaks, the screw will
> eventually break.
>
> The better, and more permanent solution is to remove each screw, dunk
> it in Almanox (or similar conductive, anti-corrosive grease) and then
> return it, tightening it to its required torque. If the set has had an
> inadvertent swim, remove the screws, clean between the pieces (ie,
> remove any corrosion) being held together and then apply a smear of
> Almanox.
>
> 73 de Brian, VK2GCE.
>
> On Tuesday, February 03, 2015 3:12 AM , Dave said:
>
> <snip> If the receiver is motorboating, two most likely suspects are
> either a bypass cap open or, more and more common, you have a Hi-Z
> ground point somewhere. Any chassis connection or screw is suspect.
> In the last 5 years I have cured many problems by finding every screw
> or binder that grounds something to the chassis by giving it a little
> "tweek." Last one was weak receive in a Mackey Marine receiver. It
> was the screws fastening the front panel. I normally go over all such
> screws and bolts first thing but forgot these. One fractional tweek
> and the problem was cured.
More information about the ARC5
mailing list