| 摘要 |
1336469 Delay lines INTERNATIONAL STANDARD ELECTRIC CORP 28 Oct 1971 [9 Nov 1970] 50085/71 Heading H3U [Also in Division H1] Two printed circuit boards with grounded copper strips 2 on their outer sides form a coil former of a luminance delay line for colour TV. The winding ends 9 of the unbraided R.F. litz wire coil 7 comprising a plurality of mutually crossed layers, whose pitch 8 determines the high-frequency delay characteristic via interlayer capacitance are initially placed in slots 4 prior to dip soldering of foot 3 which enables mounting in a further printed circuit board. The strips 2 are simultaneously dip-soldered to ground area 6, the dip soldering serving to connect the delay line to an external circuit. |
