Unusual connector on Oahu lap steel

[Brad Bechtel]

I don't recognize this connector type. Anyone else have a clue?

Good evening.

I just cleaned up my Dad’s Oahu (in the closet for 58 years). Has an odd output jack. Is there an adapter or chord available?

Thanks in advance for your help!

Bryan J. Trenholm

[Jon Light (deceased)]

There's so....nothing....there. Makes me wonder if it's an Amphenol jack with the meat of it torn off.

[Tony Oresteen]

No, but it shouldn't take much to convert it to a 1/4" jack.

Any idea what year it was made?

[Stephen Cowell]

It looks like a bayonet bulb socket. See the notches for the ears of the light bulb? First use I've seen for this.

If that's what it is, you can just break a lamp and solder to the base. Crazy!