1920's home brew tuning coils

[Daventry 5XX]

I'm currently trying to re-build a 1920's 2 valve home made set , but can't work out the coil connections.

The coil assembly is a Colvern 'New Mullard Master Three Star'

It has two outside coils : the big one is about 100 turns and the small one at the bottom is maybe just twenty turns (difficult to count)

There is a third coil inside the main coil which I am assuming is the reaction,but I could be wrong, I usually am!

I'm thinking that the 100 turn coil is probably the aerial and maybe the internal coil is possibly the grid coil not the reaction

The base connections are numbered 1 to 6 but this is further complicated by the wavechange switches which inter-connect several of the coil pins underneath the base.

If anyone can shed some light on this or provide a wiring diagram it would be most welcome.

Alan

[Herald1360]

I would think that the large coil will be tuned and connected in the grid circuit and that the two small coils would be aerial coupling and reaction.

[Cobaltblue]

There is the picture of the baseboard of a Master 3 Star here an its showing 5 out of the 6 connections in use.

In the picture top right is the ground/earth connection, top middle goes to the grid via grid leak and also the tuning capacitor.

Top left looks as if it goes to reaction capacitor.

Bottom left to the Valve anode (reaction) and bottom middle to the aerial (via capacitor).

I can quite make out the connection numbers.

Cheers

Mike T