[Test-Equipment] Tektronix PS 503A

[David]

The smallest mainframe with a high power slot is the TM504.  The TM503
is compatable with the PS503A but it will be limited to 400mA in every
slot.

On Tue, 25 Sep 2012 17:33:11 -0700 (PDT), Brian Harris
<cosmophone at yahoo.com> wrote:

>David,
>
>Thank you for the quick reply.  I have only a TM503, 3 slot cabinet.  In it is a DM501 DVM and the PS503A.  The LED remains on in the middle and right most slot.  I did not try it in the left most slot.  Maybe the TM503 is not compatible with the PS503A?  I'll try to find a manual for both and lube the power switch and put some Fader Lube on the pots.
>
>Thanks again,
>
>Brian Harris, WA5UEK
>cell 214-763-5977
>email cosmophone at yahoo.com
>
>
>________________________________
> From: David <davidwhess at gmail.com>
>To: Discussion of Electronic Test Equipment <test-equipment at mailman.qth.net> 
>Sent: Tuesday, September 25, 2012 6:56 PM
>Subject: Re: [Test-Equipment] Tektronix PS 503A
> 
>On Tue, 25 Sep 2012 16:01:40 -0700 (PDT), Brian Harris
><cosmophone at yahoo.com> wrote:
>
>>I just bought and received a Tektronix PS 503A power supply and have a few questions and needs.  
>>
>>First, it appears to be operating....at least there are adjustable voltages available on the +/- 0-20V outputs.  The RED LED in the middle of the printed box that says 400mA max is always lit.  Is this correct?
>
>Yes.  The plug-in needs to be used in a high power slot, like the
>right most slot of a TM504, to support 1 amp and then the LED will go
>out. 
>
>
>>Second, the overcurrent LEDs flash a little when I move the current limit pots.  I suspect this is normal and may be dirty pots.  I expect they should only be on constantly when there is an actual overcurrent situation.  
>
>Sounds like dirty pots.
>
>>Third, the 5V output has voltage present when I press the button titled OUTPUT, which behaves like it's a momentary on switch rather than a toggle on/toggle off switch.  Is it supposed to be momentary action or is this switch defective? 
>
>I would clean and lubricate the power switch.
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