[Lowfer] A power supply head scratcher

Andy - KU4XR ku4xr at yahoo.com
Fri Apr 16 23:38:58 EDT 2010


First, Thanks for all the responses to the antenna insulator question.
J.B. had the one i'd never of thought up, The broken pole vault pole.

I do have a head scratcher here. To get around 35 volts DC, I have
connected 2 wallwarts in series. One is a 10 volt, and the other, 
a 24 volt. Connected together I have 37 volts DC. *** This is the first
time I have ever tried this method before, so I have no previous 
experience to go by. I simply connected them 10 volt positive open, and
the negative connected to the 24 volt positive, with the negative open.
The problem I'm having is that everytime something in the house turns
OFF, it kicks off the beacon....hmmmm. AC goes off, and so does the
beacon, fan in the room goes off, beacon does too. connect the HF ant.
to the radio and it kicks the beacon off. I have filtered the hound out
of it. But can't stop this problem. It seems to be coming in on the
ground line. These 2 wallwarts were 2 pronged plugs, and would not work
the circuit until I connected a 3 prong plug with the ground wire going
to the DC negative wire. The warts are SMPS. Even though I have the
voltage I want, something is amiss. It is getting spiked somehow.
Has anyone tried this before, and had a similar experience ?? If so,
were you able to fix it, and how did you do it ?? I may have something
wired the wrong way, or maybe missing a capacitor where one should be.
I don't have a schematic for a circuit like this, and can't find one
on the net. I'm wondering if I have a floating ground issue between the
2 wallwarts.
Any input will be appreciated, and thanks for your time.

73 everyone ::: 


Andy - KU4XR - EM75xr - Friendsville, TN. USA
LOWfer Beacon " XR " @ 185.29875 KHz ( QRSS-60 )
Coordinates:  N:  35º 43' 54" - W:  84º 3' 16"
http://www.myspace.com/beaconxr
http://webpages.charter.net/ku4xr/


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