Tam Valley MFJ003U DCC Mono Frog Juicer (polarity reverser for frogs) (Scale=ALL) TAM-MFJ003U
For all DCC systems including NCE PowerCab. This board is an automatic polarity reverser for a single frog. Setup is simple, connect two wires to the DCC bus and one wire to a frog. The frog should be fully isolated. When a train crosses the turnout and the frog is the wrong polarity, the frog juicer will reverse the polarity so quickly that the train and the rest of the DCC system will never notice. Should not be used with boosters over 5 Amps. See the Dual Frog Juicer for 10 Amp boosters.
Please note - Frog Juicers are DCC (Digital Command Control) devices ONLY. They will not work with DC or 3-rail. They will work with most all DCC systems, Lenz, Roco, NCE (including the PowerCab), Digitrax, Zymo, MRC, CVP. If you don't see your DCC system here, don't worry, there are just too many to list them all!
Alas, they will not work with the Bachmann EZ-DCC system or the SPROG II as they do not have enough power to reach the 1.7 Amp switching threshold. However, if you use one or our boosters then you can use frog juicers and other auto-reversers with these systems.
Peco Electrofrog Update- All Frog Juicers work with Peco electrofrog turnouts without any modification to the Peco turnout. The same applies to other power-routing turnouts (e.g. older Shinoharas). You still need to insulate the Peco electrofrog turnouts as in the instructions that come with the turnout. For a normal turnout, that mans using insulated rail joiners on the 2 rails leaving the frog.
Peco Insulfrogs do not need a frog juicer as the frog is plastic and cannot be powered.
5 Reviews Hide Reviews Show Reviews
Great gadget to switch a dead frog to a live one. Three wires and you're done. No problems with circuit breakers.
Looking forward to installing and watch it do its magic.
I have a large layout with a number of Shinohara switches, as well as some others. Switches with a "dead" frog cause my DCC powered locomotives to stall on the switch. The solution was simple. A small Frog Juicer under the layout is connected to the two wires of the power buss. A wire soldered to the switch frog connects to the third terminal on the Frog Juicer. This simple and inexpensive device has resolved all my switch problems. It automatically changes polarity when the locomotive passes over it, and it eliminates dead frogs completely.
Pros: This product does exactly what it is supposed to do; polarity changes instantly, no hesitation, no stalling Cons: The wiring scheme requires power from DCC booster WITHOUT any circuit breaker in between booster and juicer; as my DCC wiring already included CB's for each power district, I had to run an addition feed directly from the booster, with no CD, to the juicer. Made for a lot of additional wiring. If you have a lot of juicers in different areas of the layout, like I do, extensive extra feeders will be necessary.
I hand lay my track and could not live without theses guys! They make wiring switches easy-peasy and operations smooth.