Hey guys I havent posted for a while. Just a reminder there is a swap meet at the O'Connor Scout in Hovea Street on the 7th of March.

I have recently been restoring a Lekmek 406 . Its been a interesting resto and thanks to the generosity of a few members of the HRSA its about to be completed.

Welcome back. I was thinking just the other day if you were still about.

Done some refurbishment of a few Lekmek's, fairly straight forward.

Photos uploaded.

If I'm reading the stencils correctly, the valves are 6A7, 6B7S, 6F6, 80.

That would make it a 3/4 reflex 406

Filter caps 8mfd may be paper, if not they have to go 8 to 10 μF 600V

Any cap 0.x will need to go any Mica leave well alone and the 0.01μF on the plate of the output tube is best with a KV rating.

They are all done. I'm just waiting on a proper field coil speaker and am planning on replacing the grommets on the tuning cap. It goes well at the moment.

Finding a serviceable field coil speaker may be fun. I recently machined the bobbin off one and used that, as the rodents had decided the cone was ratatouille. Make sure its cone side down on steel. Set came in from an auction with no sound: Funny that!

Don't forget that if you used Electrolytic filters in place of paper? You may need to use a 473 or 104 caps on "B", preferably close to the RF to compensate for the fact that electrolytics do not decouple RF well.

I was lucky enough to find a field coil speaker with a hum bucket coil on it. It works a treat. Fully restored now and ready to enjoy.

Never heard of a hum bucket coil!
If that was an attempt at humour, I'll laugh!

I think you might be referring to a speaker with a field coil. All such speakers had a hum bucking coil - a few turns of wire placed in the speaker field, wired in series with the voice coil, to cancel the effect of hum in the magnetic field from the field coil, who's purpose was also to act as a filter choke.

Field coils had a resurgence in the US during the Korean war when cobalt for ALNICO permanent magnets was in short supply, and before they invented ferrite magnets.

I have the circuit of a Kolster-Brandes receiver which shows the hum bucker coil as the secondary of a transformer, the primary being the field coil. Obvious when you think about it, but more obvious when shown in a circuit!