PRR J1a 6-28078 smoke upgrade

How about using the Super Chuffer II from GRJ? You'll get the chuff and idle smoke.

@Coalguy posted:

I would like to put a fan driven unit in the J1a. Bought the 27ohm smoke unit with bracket for the K4 of the same vintage. I was talking to John and he gave the pin out to me. Questions

Can I just connect it to the existing smoke unit wiring? I know it will not chuff, and is an ac regulator needed?

Or can I utilize the the chuff switch on the mother board to chuff the fan? Maybe a 5v relay?

thanks again

pat

Which ever way you go, do not put anything on the chuff wire input on the mother board....that’s a ground signal reference to command the radio board to produce a chuff....if you put voltage on that line, very bad things will happen....I’d listen to Chuck and go with John’s Chuff Stuff, ....all the added benefits sure out weigh any costs,....take advantage of Rule 17 lighting, ...have smoke at idle, and have clear how to instructions for install...........it’s not that bad to install them....after you’ve done one, it’ll be second nature.....

Pat

One problem with a simple relay, when you stop with the relay open, the fan doesn't run.  However, the smoke heater still runs and starts cooking the smoke unit.

So can I directly connect the fan driven unit to the existing wiring from the puffing unit? I know it will be always on.

thanks

Yes, just connect the fan power to the same wire, you'll have on/off control from the TMCC/Legacy remote but no chuffing.