Quote:
Originally Posted by upinflames  If anyone wants to explain changing the diodes to LEDs I'll give that a try. |
The 160X doesn't use them, It uses a low leakage 10 uf cap off pin 4 for RMS timing. The XT went with the "non-linear capacitor" circuit. It uses a couple of caps and an opamp to emulate a fast and slow timing capacitor at the same time.
A couple of 1N4148 diodes are used. Replacing them with 3mm green led's helps as it places the diode conductance at over 2 volts, it's under 2 volts with the silicon diodes. Remember to use a Sharpie to black out the LED's as they can conduct leakage current from external light sources.
Jim Williams
Audio Upgrades