Shows the VFO Amplifier to Crystal Filter IR Path covered with tubing. Tests with colored tubing besides black has shown that only black tubing is effective blocking visible and Infra-red energy. |
Shows how the Bandpass to VFO IR circuit is covered with tubing. A notch is cut out of the bottom of the tube at the Photodiode side so the tube can slip all the way over the Photodiode. |
Shows positioning of Photodiode and IRED at the VFO.
Shows the use of Optic cable & Commercial IR devices.
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