Hi Goofy

I Don't have this BR 193 but I have another example the SNCF 241 A 65 which has wheel current pick-up on 2 front driving axles and on the rear 2 tender axles.
It seems this evolution is coming from joint Märklin- Trix developments where 2 rails and 3 rails design differences are kept to a minimum.
So Märklin uses now current pick-up on locomotives more than before. Märklin is not better / worse than others but with aging (corrosion, dirt) locomotives need serious cleaning and check about wheel contacts (example VT 798 item 39970 -Schienenbus with C sine).

So a good practice on top of keeping rails and wheels clean is to check mass continuity with an ohmmeter (I discovered that a BR 45 item 37450 was supposed to have current pick-up not only from tender wheels but also from loco wheels). This helps discovering wheel pick-up failures or brocken cables
Cheers

Jean

The wheels is not isolated from the locomotives under frame so there is no reason of why with extra copper feeder as wheels contact for the Märklin locomotive.
The wheels feeds contact to the copper feeder? (If the wheels are isolated from together?)

One side is; JohnjeanB told you why.

Per.

Several years ago Märklin started using the same wheelsets for both Trix and Märklin models. These wheelsets have plastic axles and the locos have plastic trucks, so they need wheel sliders that make electric contact to the wheels.
The centre-rail sliders are plugged in - and some users converted those locos with a manual switch inside that makes them suitable for two-rail and three-rail operation.

Exactly


Now start thinking.................. ( Reading JohnjeanB and H0 again might help you. )

Per.

...and a slider underneath.

This thread started off not exactly serious but the last post has shown just what Marklin have in store for us in the future and it does look good. I have heard though that the Apple deal could come as soon as next year and this will pave the way for a new Apple controller which will not require any wheels to be contacted to the track. However a slider underneath the Tesla ...not a chance as we know it will be catenary driven.

You ..... are a gem!

Kimball

Brilliant - I had never seen that before and it is hilarious!

Ah the pre-python days. Its such a shame that across so many television networks in the world there is so much material that was lost from so many great programs.
It was the transition from shooting on film to shooting on video tape, and the early tapes were so massively expensive that after a series/season had aired some time ago the tapes were reused and old programs recorded over. Such old gems from those eras are to be treasured.

I think everybody here treasure all old gems / members

Per.