Quote from: jward on May 31, 2019, 12:27:58 AMQuote from: regorsky on May 30, 2019, 06:00:43 PMbetter control--same twin coil mechanism. The old control is a push button and if you hold it down too long it burns up the coils. The newer one is a capacitive discharge switch and much easier on the coils
Capacitive discharge in a switch control box? i highly doubt it. Who told you that?
The size of the necessary capacitor would make this almost impossible to do. A usable CD unit has a very large capacitor. Mine has one about the size of a Pepsi can, and the kits i've seen have one about half that size just to provide enough oomph to throw one switch motor. You can't fit that into a switch control box, and even if you could, it'd probably add $20 or more to the price. The control box would be so large it would be almost as large as the entry level power packs in train sets.
WHatever the "Improvement" you think you're seeing in those control boxes, a CD unit ain't it.
[/quote]
OK, I surrender--my guess is the date of manufacture is not discoverable. Thanks to all