[Hallicrafters] SX-100.

[kiyoinc at attglobal.net]

My SX-100 has a three wire cord on it with round connectors at
the radio.  This is the same connector as the Heathkit SB-303
three wire.  

Anyone know of a source for these things?   I found a similar
looking but much larger connector that is still in production.
Unfortunately it does not fit.   

I've heard that the Hallicrafters/Heathkit cord/connector was
used on commercial video equipment in the 1960's.