Dave Holt's Blog

Great work Dave, a real milestone, I bet you can't wait to get the other bord up and running.

Like the Ivatt, tells us more about it.

How long has it taken to get to this point from the first cut of material, it doesn't seam that long.

Hi, Both,

 

Larry, yes, I see what you mean. I think it's partly because the outside steam pipes and push-pull gear are missing - and the poor lighting. Quite some way off a train service - haven't done anything on electrics on the other boards. They're all still at the workshop, more or less in storage, just now.

 

Phil, I've sent some info on the Ivatt, off line. Regarding how long it's taken to reach this stage, I honestly can't remember exactly when I started cutting wood. Some time in the middle of last year, I think.

 

I've spent a chunk of time this morning filing off excess solder from the rivets on the point in preparation for fitting cosmetic chairs. Rather laborious, I must say. Also keep finding broken soldered joints at the track ends, where they cross the joints to the next boards. Seem to be chasing my tail with this problem but I'm sure the track will give in, eventually!

 

Cheers,

 

Dave.

Can you tell me what you are using for your AJ uncoupler.

Can you tell me what you are using for your AJ uncoupler.

 

Dave, sorry, no I can't! So far, I'm just making provision for a power supply via push-to-make switches for the electro-magnets. The question of AJ uncoupling magnets seems the least explained aspect of their use. We've got lots of info on the hook and various approaches to its mounting and now there are various jigs available to aid production and mounting, but the magnets remain a bit of a mystery (to me).

Dave Booth's excellent book on AJ's does give some information and I believe he and others use ex-posyt office relay coils operating on 24V DC. I'm not sure if these are still available or where from. Otherwise, it looks like winding your own using a cut down 4" nail as the armature and (it suggests) 5000 turns of 36 SWG wire. I've bought the nails but not got any further!!

 

Regards,

 

Dave.

Hello Dave,

I have been following your excellent thread with interest as it is a superb piece of modelling.

 

On the subject of coupling electro magnets have you considered those available from MSE ?

The core is 5mm diam. and the coil is 12v, I have used them for my S & W couplings for some years using an electric pencil to fire them.

I would imagine they would be ok for your AJ's, perhaps Major Clanger of this forum who markets them could advise on that score ? They are of course a more expensive option than making your own from nails and winding your own coils.

 

Cheers,

Geoff

Hello Dave,

I have been following your excellent thread with interest as it is a superb piece of modelling.

 

On the subject of coupling electro magnets have you considered those available from MSE ?

The core is 5mm diam. and the coil is 12v, I have used them for my S & W couplings for some years using an electric pencil to fire them.

I would imagine they would be ok for your AJ's, perhaps Major Clanger of this forum who markets them could advise on that score ? They are of course a more expensive option than making your own from nails and winding your own coils.

 

Cheers,

Geoff

 

Geoff,

 

Thanks for this. I wasn't aware MSE did such things. I'll make some enquiries because I'm not keen to have to make my own!

 

Cheers,

 

Dave.