Taking a stand in the name of democracy | Brief letters
John Bercow | LP cartridges | Rugby populations | Problems with a North Channel rail tunnel | Weetabix
Congratulations to John Bercow, the Speaker, for his brave and principled refusal to provide the historic platform of Westminster Hall to a man who preaches racism and sexism, and who dismisses a fundamental principle of the US constitution, the rule of law (Trump unfit to address MPs, says Bercow, 7 February). In these troubled times, the courage to uphold democracy and individual liberty is of the first importance. John Bercow deserves our respect and support.
Liberal Democrat, House of Lords
• Ned Newitt (Letters, 7 February) confuses the issue. There are two types of cartridge used to play LPs: moving coil (MC) and moving magnet (MM). The output of an MC is lower than an MM and therefore requires its own phono amplifier through which its signal is then fed to the main amplifier. The higher output from an MM cartridge can be fed direct to the phono input on the modern amplifier to which he refers. However, in both instances the deep bass line derives from the LP. Otherwise how could the reproducing equipment detect when it occurred?
Harrogate, North Yorkshire
Source: Guardian Transport