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Re: Astron RS-35A Problem



Joel -

It sounds like you are going to have to replace a few components in your
Astron power supply.  To repair your Astron, remove your modifications, then
troubleshoot.

You indicate that you purchased a "lighted" 12 V 30 A switch.  Not knowing
what you bought --- my experience has always taught me to test lighted power
switches with a VOM or VTTM before using / installing.  Let's say that I
have found a few mfg of these switches that did not function as advertised.

G. Beat


----- Original Message -----
From: <jbblack@mindspring.com>
To: AMSAT BB <amsat-bb@AMSAT.Org>
Sent: Thursday, November 11, 1999 4:12 PM
Subject: [amsat-bb] Astron RS-35A Problem


> Ok all you gurus out there, tell me what happened when I did the
following:
>
> Had today off and thought I'd do some antenna work.  Cleaned up my
> connections and re-did the one on my 2m antenna.  I also decided to hook
up
> my polarity switcher on my Cushcraft 738XB.  Well, in my shack, there is
> very little room so I decided to mount my polarity switch in my power
> supply - on the front.  I bought a lighted 12V 30A switch for this.  I ran
> my cable from the switch box at the antenna to the shack.  I then mounted
my
> switch in the power supply and connected the cable from the antenna to the
> switch.  Inside the PS, I connected GND to GND, load to the center
conductor
> on my cable to the switch box, and power to the red lead in my PS.
>
> I then turned on my pretty, little, red switch and nada, zip, zilch,
> nothing!  I checked for 12V, again nothing.  I checked the output on my
PS -
> 0.387VDC.  The positive and negative leads are not shorted.  I have 120VAC
> input to the PS and into the transformer.  I don't know what the
transformer
> steps down to as I don't have a schematic.  I really hate to think that I
> blew away my PS by just jury-rigging a switch into my PS.  I suppose
> stranger things have happened though.
>
> Thanks in advance for the help.
>
> 73,
> Joel
> -----------------------------------------------------------------------
> OM:  Joel B. Black, K2SAT          XYL:  Kristie H. Black, KF4CHN
> Eutaw, AL...............EM62bv          kahblack@mindspring.com
> AMSAT member #32589
> AMSAT Local Area Coordinator
> www.mindspring.com/~jbblack
> k2sat@amsat.org
>
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