"Dave Plowman (News)" wrote in message
...
In article ,
David Looser wrote:
"Dave Plowman (News)" wrote

I was told the land line to Brookmans Park used for R2 (light prog) on
247? metres was originally installed for pre-war TV sound which was
'advertised' as being of better quality than radio. And had about
double the bandwidth of a normal circuit. All that came from a BBC
lines person in the '60s. FWIW. After I asked why my Quad AM tuner
sounded so much better on R2 than other AM stations.


Brookmans Park was used to transmit Baird 30-line TV from 1930 to 1935.
And that required about 13kHz to give equal vertical and horizontal
definition. It's possible that one of the lines to BP was specially
upgraded for that use.

The pre-war TV sound that was advertised as being of "better quality"
(-3dB at 10kHz) was that from the "high-definition" (405-line) station
at Alexandra Palace.

It's quite possible the BP circuit was routed through AP.


Nope. BP came into service in 1930; whilst AP wasn't even chosen to be the
site for the "high-definition" service until 1935. I've never heard any
suggestion that cables to BP were re-routed to go via AP after 1935 and
there would have been absolutely no point in doing so. BP was a MW radio
transmitter whilst TV was broadcast only from AP. BP did not, could not,
broadcast TV sound. The pre-war TV service from AP was very largely
independant of BBC radio, but if they did need to link up with the world of
BBC sound radio they had direct lines to BH.

David.