"PANEL DC3"

Radio Record, Volume VII, Issue 52, 5 July 1935, Page 16

"PANEL DC3"

Pulse of Empire Exchange | Broadcasts —

]DC8 was used for the first time duting the 1984 Christmas _ broadcast, or,.as it is better known, the Empire Exchange, and is the third dramatic contro! panel to be installed in .Broadcasting House. This panei, which embodies many features not included in. the two earlier panels, was designed by

Mr. J. A. G, Mitchell, one of the B.B.C. designs engineers, The DC rooms at Broadcasting House are ‘equipped with red.and blue lights, inside and out of. each room, and the wiring of each room provides for rehearsal or actual transmission. © Indicators for return lights, to operate from studios in which orchestral music is performed co-jointly with: dramatic items, are provided, as also‘is‘a loud’ speaker’ to enable the production to be heard. A telephone and microphone are installed as part of the equipment of each panel. The two earlier DO panels at’ Broadcasting House had -11 fade controls, DC3 has 15. The-centre.

of the panel contains a master fade control, on.each side of which is a group of seven. There is more in DC8 than in the. previous controls, for it is a central exchange. For a broadcast as that of the jubilee, the return circuit for DC8 is often by radio link, An oscillating howl is always a possibility during the feed-back of a programme to its source ‘along a transmission chain, but DC3 does not allow. howls because, while an individual programme source is operating, it cannot be fed back to its associated return circuit. It is one of those masterpieces: of Broadcasting House which must not-be.described in detail.