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When I was building the linear amplifiers I could not find a source for the Amperite Time Delay Relays. The 3CX series tubes require a 3 minute delay before application of High Voltage. The 3CX1500A7 has a further enhancement where there is a 3 second delay built into a step start circuit on the filament circuit. Thus out of necessity I designed and wrote the code for a time delay relay using the PIC Micro-Controllers as a basis for the timing. The code is written for both the PIC16F84 as well as the PIC12F675. |
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