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[frank]

I've narrowed down my latest problem to a small 110VAC to 12VDC power supply for a PTZ camera.  When I unplug the power supply all is well.  But when I plug it in, two appliance modules do not work.  I think it is a matter of signal shunting rather than signal noise.

I would like to build a low current "xppf" for the power supply.  Do we have a schematic for it?  I've read it has two ea. 115 uH inductors in series, but I don't know what the, perhaps three capacitor values are.

The best price I've found for the xppf is around $20.  Maybe I'm looking in the wrong place.  I probably have enough parts to breadboard one.

Thanks,

Frank

[Brian H]

http://www.idobartana.com/hakb/index.htm
On the left panel.
Schematic 6287/8 choice.
The 6288_Schematic_vA.pdf is the Leviton 6288. That X10Pro's Cross Reference Chart says is a XPPF.
It shows three inductors and having looked inside a XPPF can verify it uses three inductors. That get warm if pushed to the rated 5 amps.
Please use care. The capacitors should be rated for AC Power Line use for safety.

[frank]

Great information.

Might be tough to buy the parts and to build a filter like that in a proper manner for $20.

Thanks Brian,

[JeffVolp]

Might be tough to buy the parts and to build a filter like that in a proper manner for $20.

Yes, $20 for a filter isn't a bad price.  Parts for the F10 cost $24.43, not including shipping.  ($4.90 just for the plastic case)

Jeff

[frank]

Jeff, which filter is the 'F10'?

For a couple of years, I had been moving breakers to keep the X10 devices on the same leg of the 220.  Finally decided to use the .1 & 18uh series network across the legs.  When I did that, some distant devices on the 'original leg' quit working.  However, the devices I had installed on the 'new' leg did, indeed, begin working.  I then determined that a camera power supply on the breaker with the new devices was shunting the signal.  Not enough to shunt the signal to the new devices, but enough to shunt the signal to the distant devices on the 'original' leg. 

Thus far, it seems that only one device in the entire house significantly shunts the 120 kHz signal.  Does that seem odd?  I have a house full of electronic and electrical stuff.

[Brian H]

The XTB-F10 is Jeff's designed X10 filter.
http://jvde.us/xtb_index.htm

[frank]

Thanks Brian.

Lots of really nice looking and well designed equipment on that site.

[Brian H]

Having both a XTBM and an XTB-IIR. I agree 100%. Good stuff.