Re: (ET) Question for the EE types

[Rob Brockway <GEtractor Yahoo com>]

Keep in mind the power loss with resistors used with the field is trivial. 
 Resistors used with the armature is significant.
Rob

Sent from my iPad

On Jun 22, 2012, at 5:43 PM, Charlie <medievalist gmail com> wrote:

> In at least three places in the Elec-trak's original circuitry,
> voltage is being dropped by resistors which waste a portion of the
> power as heat.
> 
> In theory, could a circuit be designed to substitute a less lossy
> voltage converter (buck-boost maybe?) using the original wiring and
> connectors?  A "plug in" replacement for that card full of resistors
> under my dashboard, or a "bolt in" replacement for the toaster?
> 
> I'm aware that an Alltrax would make this unnecessary, but I've got a
> late model I-5 in reasonably cherry condition and I don't want to
> install a potted controller (admittedly if I had a field reversing
> relay I'd drop in an Alltrax in a heartbeat).
> 
> --Charlie
> 
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