[Milsurplus] R-100/URR AC Power

[WA5CAB at cs.com]

John,

According to the schematic in TM 11-310, the ON-OFF switch is a DPST.  One of 
the NO contacts goes to B-.  The other goes to the AC-DC switch.  In the DC 
position, it goes to A-.  In the AC position it goes to fuse FS1 which then 
goes to one side of the AC line.  The movable contacts are tied together or the 
original switch may have been built with only one physical terminal for the 
function.  When the switch is ON and the AC-DC switch is in the AC position, one 
side of the AC line does go to the negative B-battery terminal through the 
switch, and to a ground symbol, which I assume is chassis since there's no note 
saying otherwise.

The other side of the AC line goes to fuse FS2 then to R26 and the 115-230 
switch.

I don't see any notes in what's in TM 11-310 indicating any changes related 
to Order Numbers.

In a message dated 1/1/2009 6:32:40 AM Central Standard Time, 
jpwatkins9 at yahoo.com writes: 
> Hi All,
> 
> Working on my R-100/URR, and found an intermittant 1 meg audio pot w/power 
> switch (now defunct).  I have another audio 1 meg pot w/switch coming from 
> Antique Radios, but noticed that the schematic has one side of the AC going to 
> the neg side of the 90V battery pack.  no other connection when in AC 
> position.  In AC position, that means that one side of the 115/230v line is open.
> 
> Can this be correct?  I realize that this is a transformerless set, and I am 
> not really familar with this type of setup.  Mine is a Phil 44-03 set with 
> the 115/230 switch.  Any help would be appriciated, have some time as the 
> package has to be re-sent to an APO before it gets to me here in Oman.
> 

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480
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