If you meant the details for a plain dipole, it was a length of copper tube - a resonant half-wavelength - split in the middle and fed with coaxial cable. Use placcy pipe to hold the two halves together.
There's a thread
here that describes it a bit.
If you want to fabricate your own, drop me a PM and I'll send you the exact dimensions etc. It's not difficult.
The hard part is getting the antenna up high enough and clear enough to pick up airband transmissions. The radio horizon in statute miles is 4/3 the square root of the height above ground in feet - so you don't hear many ground stations unless they happen to be on hilltops.