In article i,
Iain Churches wrote:
Indeed - the 'BBC' way I was taught on setting bias in the early '60s
was to increase the bias until the level peaked (using 1kHz tone) then
carry on 'till it dropped by 1 dB. Which was a reasonable compromise
for the standard tape the BBC used in those days.


Later, a 10kHz tone was used, and bias set at 3dB over peak.
This was recommeded by AGFA for PEM468.

Indeed - but the practice I was taught was from the days when machines
struggled to make 10kHz on BBC standard tape.

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