[Milsurplus] Need help with ART-13

[BOB]

Bob,
        I run a time delay from the 115V input to kick in the 400 and 1200 
volt primary's on my P.S. The 28 volt supply comes on when the main switch 
is turned on. The orginal design had the delay tube turning on the primary's 
but I found that to be a problem. I am about to install a contactor 
activated by the delay to do the heavy lifting. Should work out much better
Good luck
There is a Yahoo Art-13 site that is great for this kind of info.

Bob
W1GTH


----- Original Message ----- 
From: "mac" <w7qho at aol.com>
To: "Robert Watson" <kn4hhptc at yahoo.com>
Cc: <milsurplus at mailman.qth.net>
Sent: Tuesday, March 08, 2011 7:00 PM
Subject: Re: [Milsurplus] Need help with ART-13


> Bob,
>
> The connection should (1200v) CT to one end of the 12.5 ohm resistor
> and the other end of the resistor should go to chassis ground in your
> PS.  Chassis ground in the PS should, in turn, be connected to both
> pins 5 and 9 on the ATC input connector.  There should also be a
> connection between the (1200v) CT  and pin 2 on the ATC input connector.
>
> Sketch of a PS I helped another guy build forwarded off list.  Rough
> but shows all essentials.
>
> Dennis D. W7QHO
> Glendale, CA
>
> ************
>
> On Mar 8, 2011, at 3:18 PM, Robert Watson wrote:
>
>>  There is a 12.5 ohm 10 watt shunt resistor on the centertap of the
>> power transformer supplying 1200VDC and is connected to pin 5 of the
>> ART-13 power connector.  The center tap is floating, at least to the
>> point where the shunt resistor is connected to pin 5.
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html