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

[Roy Morgan]

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 --