G scale K-27 revolution train engineer install

paul delany

Registered
30 Mar 2018
116
0
53
Dublin Ireland
Hi folks has anyone here I stalled a revo sound receiver in a bachmann K-27 as I need some help please...
 

dunnyrail

DOGS, Garden Railways, Steam Trains, Jive Dancing,
25 Oct 2009
18,587
3,794
72
St.Neots Cambridgeshire UK
Have 3 sone and the installation is pretty simple. But are you talking Battery or Track Power? I would imagine the K27 has plenty of room in the tender it will be all about how many wires come into the tender and what they are. My jobs were a couple of Railcars and an LGB Unita Mallett.
 

Neil Robinson

Registered
24 Oct 2009
9,422
540
N W Leicestershire
Hi folks has anyone here I stalled a revo sound receiver in a bachmann K-27 as I need some help please...
A few words of caution, if you intend using Bachmann's chuff sensors. These are wired unconventionally on the K-27. Bachmann changed this on their other, later, introductions but AFAIK never changed the K-27.
This link http://www.phoenixsound.com/pdf/BachK27.pdf to instructions on installing Phoenix units may be of some help, in particular page 12.
 

Greg Elmassian

Registered
8 Mar 2014
4,661
687
San Diego
www.elmassian.com
In addition to the Phoenix instructions, the physical chuff timing is adjustable, there is a moveable piece of plastic that interrupts the opto sensor, and it can be adjusted to get the chuff timing exactly on.

Also the comment in the file that you need a transistor to "boost" the chuff signal is incorrect, the chuff logic is backwards, and the addition of a single transistor will invert and correct the logic. (chuff trigger should be pulse to ground, but in the K-27 is is pulse to positive)

There are other documents that tell you where to put the transistor, but you can use a simple NPN switching transistor.

Greg

(after this false start, where an individual tried to establish a new convention for the trigger logic, the C-19 was produced with the industry standard logic)
 

paul delany

Registered
30 Mar 2018
116
0
53
Dublin Ireland
Have 3 sone and the installation is pretty simple. But are you talking Battery or Track Power? I would imagine the K27 has plenty of room in the tender it will be all about how many wires come into the tender and what they are. My jobs were a couple of Railcars and an LGB Unita Mallett.
Hello thankyou for the replies,, my concern is,in relation to controlling the lights and smoke..the reason being,,,apparently the motherboard on the k27 does not have forward voltage for the lighting and smoke,one the train engineer receiver is fitted apparently
 

paul delany

Registered
30 Mar 2018
116
0
53
Dublin Ireland
Hello thankyou for the replies,, my concern is,in relation to controlling the lights and smoke..the reason being,,,apparently the motherboard on the k27 does not have forward voltage for the lighting and smoke,one the train engineer receiver is fitted apparently
So I'm assuming I will need to use the auxiliary harness supplied by crest to control the lights etc ..
 

PhilP

G Scale, 7/8th's, Electronics
5 Jun 2013
27,307
2,818
Tamworth, Staffs.
Pretty sure there is a fairly comprehensive thread on here about this? - I know we went into chapter and verse on inverting the 'chuff' signal..
:think::think:
 

paul delany

Registered
30 Mar 2018
116
0
53
Dublin Ireland
Pretty sure there is a fairly comprehensive thread on here about this? - I know we went into chapter and verse on inverting the 'chuff' signal..
:think::think:
I have done a few searches on here but found no posts on the subject..
 

paul delany

Registered
30 Mar 2018
116
0
53
Dublin Ireland
The modification was to the chuff lead on the original Bachmann board... the "free lead" on the transistor goes to the chuff input on the Revolution.

Greg
Hi Greg thankyou for your reply, on the question of battery conversion for my Shays can you think of any reason why I couldn't use a 14v Lipo battery to power my revo receiver for my Shays?
 

Greg Elmassian

Registered
8 Mar 2014
4,661
687
San Diego
www.elmassian.com
I would only use Lithium batteries in any conversion, more power in smaller space, but get the right charger and treat them well.

You said specifically Li-Po, so if you are using cells in pouches, you need to ensure no way they can get pinched or punctured.

Cylindrical batteries best for self installs in most cases.

Greg