Rework is not Repair and Audiophiles

Have changed the ramp board timing capacitor part - I wanted to extend the maximum reset time from 500 ms to 5 seconds (felt 500 ms a bit short for analog meters etc); and the maximum ramp time to 100 seconds. The latter needed a 100 uF polypropylene film capacitor (dark grey).

The red ones are 1 uF - some sort of 'audiophile' capacitor (tight tolerance useful for me (timing), but I never understand why - instead of worrying about capacitors - audiophiles don't worry about their speaker cable connectors' impedance - I mean someone could introduce a line of (expensive) 8 ohm coaxial (gold?) connectors (and cable) to match the 8 ohm speakers rather than using 300 ohm or whatever cabling...any textbook of electromagnetics gives the necessaries...). (Usual reply is that 'impedance argument only applies at high frequencies' - despite the coaxial line impedance not being frequency dependent...)

Another rework: Stand By (STBY) mode now turns the 2N2222 transistor on (Ramp board) thus setting the feedback capacitor voltage to zero. This means that the computer when switched from STBY to COMP in REP mode will start the ramp voltage at zero. The initial design just had the thing free running.