I am building a four track O guage layout. My current transformer is a Lionel 1033 and a Lionel CW-80. I have thought about going to the lionel 620 watt transformer. I run 1950's F3 trains and a few celebration f3s and they need a little more juice than normal
Do you think the 620 is overkill? Would I be able to run all four tracks plus be safe with the various f3's
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What kind of track; about how long will each loop be; and will they be separated or connected ?
Two tracks are 8 by 8 and two are 6 by 6. I run vintage F3s with two motors and a couple of post war celebration F3's
Only you can tell us what trains will be running at the same time, and how many other items will be drawing current. The 1033 is too small. The 620 may be overkill. The conventional ZW is a good compromise, if you don't need all the latest electronic features. The size, length, and number of tracks is not important. The maximum simultaneous current draw is.
Do you have an ammeter? I suggest that you measure the current draw of the twin-motor F3's, at medium speed. Then measure the other trains, with the passenger cars, if any, all lit.
Figure out the wattage you need, using the simple equation of watts = amps x volts. Use 12 volts as an example.
90 Watts is the input power rating, not its output. The transformer will deliver maybe 75% of that. That equals about 68 Watts. Divide 68 by 15 volts, and you get around 4.5 amps. If your total is more than 4.5, the 1033 will be overtaxed.
I agree with Arthur, your 1033 and CW80 will be quickly overwhelmed. If you are going to run 4 trains you are going to want 4 control handles which means 2 transformers. I would shop for 2 reconditioned KW’s or ZW’s. This will also give you 4 terminals to power your accessories.
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