Euan Show full post »
Euan
Sorry to be a bit of a numpty but I'm still a little unsure how I physically wire the bulb into the layout. Looking at pictures online, this type of bulb looks like a small bayonet type with a contact on the base. I get that I need to, in effect, wire the bulb between the dropper and the bus what I am not sure about is where I solder the 2 wires to the bulb (1 that will connect to the dropper and 1 that will connect to the bus).

Many thanks, Euan
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AHJAY
OK... it will be an incandescent bulb. (Not any other type)

It will either have two pins (a plug-in type), a centre pin and a shield/bayonet thread ( A screw in type) OR be a festoon type with a metal cap on each end. In each case its simply one wire to each contact.

regards, Ahjay
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Euan
A related issue - am having a few issues with the new TTS decoder. Installed ok but keep getting 'cannot read cv' when programming. I'm using an NCE Powercab so managed to work round this, programmed the decoder and all works. The problem that has emerged is that the loco suddenly accelerates (with no warning and no pattern to this occurrence ) when moving at a very low speed.
I have tried the following;
  • reprogrammed after carrying out a factory reset (cv 8 set to value 8)
  • reprogrammed on the programme track but connected directly to the Alpha box (rather than the NCE power)
  • tried changing the cv 29 value to 34 - didn't work
  • tried reprogramming in 'programme on the main' mode and even used the 'configure' to alter the various bits of cv 29
The manufacturer and decoder info also did not display when programming the decoder - any ideas?
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AHJAY
Most TTS setup is done via program on the main.

Re program track: It is not so clear from your post, but are you trying to use Program track with it also passing through the Apha Box?

Program track use is current and power level limited so it should always/only be ysed directly from the PowerCab, not via the Alpha Box.

regards, Ahjay
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Euan
Hi Ahjay - I have a small piece of track, mounted on a piece of wood that I use to progamme locos.

My standard approach has been to plug the Powercab into the original NCE power supply and then link my stretch of wood mounted track to this. Up until now, this has worked well.

As I kept having the 'cannot read cv' message, I trawled the internet and found reference to the need for more power when progamming TTS decoders. I then plugged my length of progamming track into the Alpha box and tried that approach using both 'program track' mode and then 'program on the main' mode when I received the 'cannot read cv' message yet again. This didn't work either!

The sudden acceleration is incredibly intermittent - can discern no pattern to this.
thanks - Euan
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AHJAY
Not all TTS seem to be able to be read on many systems - a decoder issue. I'd try a 100 ohm resistor in series with one wire to the program track OR just work with POM all the time with TTS.

The surging or sudden acceleration IS an issue that will almost certainly be decoder based. Either setup OR perhaps just a problem decoder.

regards, Ahjay
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Euan
Thanks for the reply Ahjay. Have re-programmed using POM - time will tell if the glitch has gone! The loco ran at no.1 on 28 step speed step without any sudden lurch but will only know if it has disappeared after running it for a while. If the problem re-occurs I will contact Hornby. Thanks for all the help
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