Today a BIG box arrived from Luxembourg, containing the 21660 green/yellow Jagermeister railbus that I had purchased from Pugwash (thanks Puggy, it's very nice!). This colour version was a one-year-only (1998) non-catalogued variant that was made right at the end of the main run of 20660 red/cream 'buses; unlike the later re-issued 22660 (MTS chipped), these earlier ones were of course analogue-only, but they did have the special "EAV" circuitry which means they won't start to move until about 5 volts minimum is present on the track.
Now, I have an LS all ready to go in this, complete with the lovely chuggy petrol motor sound file. I'm wondering if anyone on here has direct experience in chipping one of these older analogue railbuses, in particular where and how to connect the decoder wiring to the unique circuit board that these have - the square one with central gap that sits around the motor in the underframe. Obviously I will need to bypass most of the factory electronics, because I need to take the EAV circuitry and voltage stabilisation out of the picture - but as the circuit board itself forms part of the motor locating hardware, it is not a simple job of ripping the old board out and discarding it completely.
There is also a relatively complicated lighting setup in these, with both a red and a white bulb at each end for the directional head/tail lights (through the same lenses, using clear plastic prism "light guides") - so any advice on how to rewire the lights would be appreciated.
Mike's old post in the DCC fitting compilation thread doesn't actually help much with this one, because that is just for piggybacking sound onto a later-model railbus that already has factory MTS fitted - I need to do a sound and driving decoder install from scratch.
So, can anyone help please?
Jon.
Now, I have an LS all ready to go in this, complete with the lovely chuggy petrol motor sound file. I'm wondering if anyone on here has direct experience in chipping one of these older analogue railbuses, in particular where and how to connect the decoder wiring to the unique circuit board that these have - the square one with central gap that sits around the motor in the underframe. Obviously I will need to bypass most of the factory electronics, because I need to take the EAV circuitry and voltage stabilisation out of the picture - but as the circuit board itself forms part of the motor locating hardware, it is not a simple job of ripping the old board out and discarding it completely.
There is also a relatively complicated lighting setup in these, with both a red and a white bulb at each end for the directional head/tail lights (through the same lenses, using clear plastic prism "light guides") - so any advice on how to rewire the lights would be appreciated.
Mike's old post in the DCC fitting compilation thread doesn't actually help much with this one, because that is just for piggybacking sound onto a later-model railbus that already has factory MTS fitted - I need to do a sound and driving decoder install from scratch.
So, can anyone help please?
Jon.
