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Howdy!

I'm rather new to O-Gauge and am learning fast but I ran into something that surprised me. Yesterday I modified one of my conventional control locos to TMCC using an Electric RR board (Pretty easy. Very good control). Anyway, as part of the troubleshooting process I put a volt meter on my track and found it was getting 13volts consistently around the small test track. I'm using a Lionel CW-80 transformer pushed to full power and an older (new to me) Lionel Cab-1 Remote and base. According to Lionel's site, the CW-80 is supposed to put 18volts at max. I did verify that I'm connected to track power and not to the variable voltage accessory side of the PS.

Anyone have any ideas?

Thx!

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It appears your CW-80 transformer is working just fine. 

 

Here is the "correction chart" for measuring the CW-80 output:

 

Originally Posted by lionelsoni:

Do you have a "true RMS" voltmeter?  Most AC voltmeters assume that you are measuring a sinusoidal waveform, which the CW-80 definitely does not put out.  Here is a correction chart for use with an ordinary voltmeter:

 

Meter          RMS 
  0          0
  0.5          1.6
  1          2.7
  1.5          3.7
  2          4.6
  2.5          5.4
  3          6.1
  3.5          6.9
  4          7.5
  4.5          8.2
  5          8.8
  5.5          9.5
  6          10
  6.5          10.6
  7          11.2
  7.5          11.7
  8          12.2
  8.5          12.7
  9          13.2
  9.5          13.7
 10          14.1
 10.5          14.6
 11          15
 11.5          15.4
 12          15.8
 12.5          16.2
 13          16.6
 13.5          16.9
 14          17.3
 14.5          17.6
 15          17.9
 15.5          18.2
 16          18.5
 16.5          18.8
 17          19
 17.5          19.3
 18          19.5
 18.5          19.7
 19          19.8
 19.5          19.9
 20          20

 

You can see that when the CW-80 is putting out its full 18 volts, an ordinary meter (which I'm assuming is what you've got) should read about 15 volts.

Thank you gentlemen. I appreciate all of the replies. I doubt my meter is a true RMS meter. I think I bought it at Lowes for testing house wiring when I was doing a little rewiring. I didn't check voltage with the engine under a load. just the track hooked to the volt meter. I can live with the 13 volts. Both of my engines seem to run just fine as it is. I was asking because the smoke unit on my one engine I had just added the new board to wasn't heating up and I had read that some engines may require as much as 14 volts before making smoke as they should. I probably burned the smoke unit out from lack of oil. It was my first loco and I wasn't schooled on how important it was not to let the unit go dry.

Thank you all again.

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