antenae for very vintage AM tube radios

Could be, depending on the model, its vintage, and how long the wire is.

Tabletop radios from the mid-1930's and earlier commonly had or required a long piece of wire as an antenna, and sometimes had (externally) a small cardboard form which the wire could be wound around for convenient storage when not in use.

Sets from the late 1930's, the 1940's, and later commonly had a cardboard back, with the antenna consisting of a long piece of wire permanently routed multiple times around the periphery of the inside of the back. That back is commonly missing when those radios are found today, so what you may be seeing is the short piece of wire which connected between that antenna and the circuits in the chassis. If that is the case you can probably get it working reasonably well by soldering a long piece of wire (say 10 or 20 feet) to that stub, and extending the wire over as long a distance as you can without it being obtrusive.

If you can indicate the make and model of the radio, I can probably be more specific.

Regards,
-- Al

There are a couple options here: (http://www.tubesandmore.com/), if you are not concerned with an actual restoration. Click on, "Radio Parts and Restoration", then on, "Antenna" for their offerings.

Awsome responses. Just what the doctor order and to think I had fear of snooty audiphiles dissing these mono crackling boxes. I'll have to find me a cardboard wind-y thing but will use a long modern speaker wire for now, I have 2 philcos one wood w/faux aligator skin and a handle, and one darker wood and vert very deco. Also from Los Angeles manufacture apparently neat light wood bodied Hoffman has stickers from LA stations many of which still are on Air. All three are bookshelf size and work.