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LO 0)I'-I 0 _,,,.

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We report radio (NRAO VLA and Australia Telescope Compact Array), soft X-ray (Rossi X-Ray T iming Explorer ASM), and hard X-ray (Compton Gamma Ray Observatory BATSE) observations of a 1998 outburst in the recurring X-ray transient 4U 1630[47, where radio emission was detected for the Ðrst time. The radio observations identify the position of 4U 1630[47 to within 1A. Because the radio emission is optically thin with a spectral index of D[0.8 during the rise, peak, and decay of the initial radio event, the emission is probably coming from an optically thin radio jet ejected over a period of time.