"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.

David.