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Tech Help - Projects Page / Re: Total Recall no modulation
« on: February 06, 2021, 09:26:37 AM »
OK, so I traced down the siren to the delay pot:
edited with new info:
Replaced that and it’s quiet. Now my 4047 pin 1 reads 0V and pins 2 and 10 read -15.2. Voltages seem fine on the 4047 socket if the IC is removed. So does the delay pot (-15.2V). I get delay on pin 3 of the bbd but it is very weak. Have to find the next issue
edited with new info:
Replaced that and it’s quiet. Now my 4047 pin 1 reads 0V and pins 2 and 10 read -15.2. Voltages seem fine on the 4047 socket if the IC is removed. So does the delay pot (-15.2V). I get delay on pin 3 of the bbd but it is very weak. Have to find the next issue
