[R-390] R-390 Power-on micro switch

[Scott, Barry (Clyde B)]

5) Leave the switch in the "StandBy" position and use an external switch.

I constructed a back panel for my desktop rack with a rocker switch that controls power to the radio and the DC supply for the fans.  The microswitch is good in this radio, but I think it doesn't hurt to leave it alone.  Yes, I do have inrush limiting as well.  I do need, however, to add a bucking xfmr.

Barry(III) - N4BUQ

> At 11:40 PM 7/29/02 -0700, Bill Smith wrote:
> >Interesting venture tonight. ... the notorious micro switch 
> had failed.   ...
> >Hopefully the R-390 will run with the repaired switch for a while.
> 
> 
> Bill and others,
> 
> I believe that we can help our radios by some improvements:
> 
> 1) Add inrush current limiting
> 2) Add a line voltage bucking transformer to reduce modern 
> 122-125 volt 
> line voltages down to the design target of 115
> 3) Add fans, ESPECIALLY in the R-390 non-A
> 4) Add a line relay that is operated by the microswitch and 
> turns on the 
> rest of the radio.
> 
> All these things could be combined into one modification and 
> most likely 
> done with no holes drilled.
> 
> I'm looking for my round tuit to get started on this project.
> 
> Roy
> 
> 
> - Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
> 7130 Panorama Drive, Derwood MD 20855
> Home: 301-330-8828 Work: Voice: 301-975-3254,  Fax: 301-948-6213
> roy.morgan@nist.gov --