How to use a relay to switch the Hot switch gain mod.
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This the the schematic for the
DPDT 5 and 12 volt relay's that I stock.
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This is a relay power power
supply board. The white wires
are the 6.3 vac coming from the amps heater supply. To
relay coil + goes to the relay coil positive. The relay coil minus is
what you ground with a switch to turn the relay on. I used 4700uf/25V caps
because that's what I had on hand. I stock 4700uf/16Volt caps to use on these
relay power supplies.
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This is the schematic for the
relay power supply board above. I have two 4700/16V filter cap and I
have them separated by a 180 ohm 1/2 watt resistor. The 180 ohm resistor drops
the supply voltage to the relay down close to 5 volts. Without out it I was
closer to 7 volts. You can adjust the value of this resistor to suit your
particular amp.
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