[R-390] Power Switch

Don Kammer norad2240 at gmail.com
Wed Feb 13 13:34:52 EST 2013


Good morning Chuck,

Do you know, or do you know of anyone else who would know, where I could
buy a replacement fuse assembly for the back of my R390-A?  Many thanks for
your help!

Don Kammer
KB0JTF
C: 719-244-5091



On Tue, Feb 12, 2013 at 10:11 AM, <chuck.rippel at cox.net> wrote:

> You can also take the power switch apart relatively easily, clean the
> contacts with a contact file and re-install it.  Putting a .05 @ 1KV across
> the switch might help supress the arc but as we've discussed here before,
> the inrush on the radio is fairly substantial.
>
> Besides removing the screws securing the switch assy to the FUNCTION
> cluster, there are also what appears to be aluminium rivets holding the
> switch body together.  These have a very low pitch thread on then and can
> be backed out.  Use a knife blade under the head, and pack them away just
> enough to get some purchase on the head.  Pull with a set of needle nose or
> small pliers; they will try and twist as they are pulled out. "Assist" the
> twisting action to remove them.  There are also 2 snap tabs on the switch,
> carefully disengage those and the switch can be taken apart like a
> clam-shell.
>
> CAREFUL!!!  Some of the parts inside are spring loaded and are capable of
> flying to parts unknown if allowed.  Take a small contact file and clean
> both sides of the switch contacts.  Re-assemble and enjoy.
>
> ---
> No  trees were killed to deliver this message.  However, a large number of
> electrons were terribly inconvenienced.
>
> Chuck Rippel
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