[R-390] R-390 (non A) power plug.

[Roy Morgan]

At 02:28 PM 4/9/02 -0400, Jim Temple wrote:
>My new r-390 (NON-A)
>
>I have obtained a length of 3 wire and am installing it now.

I assume you mean a three wire line cord with a grounded plug.

>1.  Does it matter which lead, hot or common, is attached to F101?

YES, it matters.

>  Would it
>be best to wire the hot (black) wire to  post "D", which is attached to
>F101, for purposes of efficient fuse protection?

SAFE is the word not "efficient". The hot wire (black in US Standard 
cables) goes directly to the REAR terminal of the fuse holder (through the 
line filter in the case of R-39x radios).  This does two things:

  1) Reduces to the minimum the amount of line voltage exposure inside the 
radio after the fuse blows.
  2) Protects you (to some degree) from contacting the line voltage as you 
replace the fuse.

>2.  Would the power plug ground (green) best be utilized by attaching it to:
>     a.  Post "C"?

Yes, (I assume contact C is the one going to ground..)

>     b.  The housing ground post?

Do you mean the threaded center mechanical clamping post?  NO.  Do not 
depend on that for grounding.. do not use it.

Roy


- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
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